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- Silica Sand - Belmonte/BA | Brasil Mineração
High-purity Silica Sand from Belmonte, Bahia — ideal for glass, construction, and industrial applications. Partner with BR Mining for quality sourcing and supply. Silica Sand Belmonte - BA The area of mining process no. 871.411/2020 occupies 47.91ha and is located in the municipality of Belmonte, Bahia, Brazil. HIGHLIGHTS SILICA RESERVES From a surface area of 32.16 ha and with a useful sand thickness of 5m we obtained a measured reserve of 2,412,400 t. From the drilling work it was possible measure the reserves of useful siliceous sand existing in the area. For the Indicated Reserve, an additional 1,206,000 tons have been evaluated. GRADES 77.00% of the samples analyzed at the deposit show levels greater than 99.51% SiO2; with the main contaminants (Ti, Ca, Mg, Al, Fe, P, Na, Zr and K) not reaching, on average, 704 ppm when converted into their respective oxides. The analyzed ore presents a maximum silicon dioxide (SiO2) of 99.80%. LOCATION Around 200km from the port of Ilhéus/BA, its location is strategic for bulk exports. As a result, the reduction in logistical costs is drastically reduced, making it one of the most expensive aspects of mining. The port supports ships with a capacity of up to 30,000 t. POSITIVE FINAL REPORT Studies carried out in these areas, by BRM, were sufficient for proper qualification, granulometric characterization and quantification of the deposit of high purity siliceous sand. It is noteworthy that the work carried out attest to the viability of the technical and economic use of the reserves , enabling rational developed of a large scale industrial mining site. Tune in to our exclusive podcast showcasing the Silica Sand deposit in Belmonte, Bahia. Deep Dive BRM Podcast 00:00 / 17:48 LOCAL GEOLOGY The geology of the siliceous sand deposit in the studied area is the same as that of the others siliceous sand deposits in the region, that is, it is inserted in the Santa Maria Formation Eterna, so called by Lima et al. (1981). Even though they are so common in the region, coverings enriched with siliceous sand are more expressive, both in area and thickness, when located in elevated tabular terrain, with elevations close to those at the base of the Group's lithotypes Barreiras, like the Principal and Delson Araújo incidents. These deposits are considered the most preserved, true testimonies of the entire process of formation via in situ residual concentration of the sandy-clayey part of the metadolomites siliceous with quartzite intercalations, from leaching of the carbonate fraction. GEOLOGY AND GENESIS OF SAND DEPOSITS. The occurrence of siliceous sand within the limits of process 871.411/2020 was mapped, at an appropriate scale. This mapped deposit is located in the area dominated by the Santa Maria formation, in the Rio Pardo Basin, consisting of siliceous metadolomites with fine intercalations of quartzites. The research work carried out allowed some conjectures about the origin of sandy deposits. These deposits were probably formed by in situ residual concentration of the sandy-siliceous part, resulting from leaching of the fraction carbonate present in very siliceous dolomites. The process would have started at the time when the metasediments were covered by the Barreiras Formation. Surface water, infiltrated into the sediments, percolated through the carbonate-siliceous rocks, leaching the carbonate fraction gradually, from top to bottom (as the water table was lowered regional), widening fractures and leaving the compartments partially solubilized filled with siliceous residue. The process remains active to this day, even after removing the coverage of the Barreiras Formation. In the same way as the sedimentary cover, a substantial portion of the deposits formed was carried away by erosive action. Reinforced hypothesis due to the presence of preserved bodies, identified in the region. Fig 1. Local geology with rolling mesh and identified lithologies. The angular nature of the grains of sand and gravel, the occasional occurrence of small quartz crystals well formed in the middle of the sand, the absence of clay, the low compaction (high porosity) of the sand, the existence of filled sinkholes, the absence of signs of stratification in the sandy deposit, the morphology of the deposits and the verification of a “bottom” made up of “hard sand” (not disaggregated), are some of the aspects that reinforce the genetic hypothesis exposed above, eliminating the possibility of transporting grains of sand, for which only small displacements within the “gaps” of the dissolution cavities. DESCRIPTION OF SAMPLING HOLES GEOLOGICAL MAPPING. Aerial photographs, satellite images and GPS were used as auxiliary tools for geological mapping, resulting in the creation of a simplified map. No pits were dug in the area because it was only pastureland. A regular square grid of 100m x 100m was used to drill the holes, establishing a maximum depth of 6.00 m. The surface delimitation of the sandy deposit was made through direct observation in the field with the aid of GPS, adopting paths along the contacts between clean sand and the yellowish sandy-clay material, the latter considered the remainder unusable. It is worth noting that the transition from useful white sand to yellowish clayey sand is easily identified in the field, if we take into account the following contrasts: Exposure of the material brought to the surface by anthills; Thinner and more stunted vegetation in the areas of useful sand; Higher terrain with typical morphology of sand trays; Dry, porous terrain and a deeper water table in the sand areas Fig 2. Topogeological map and positioning of the sounding mesh and identified lithologies. DRILLING. The drilling work was preceded by office planning where, in light of the preliminary geological reconnaissance work, potentially promising areas were selected and points were designed for drilling holes with anchorages to the provisional markers plotted during the topographic survey phase. The equipment used was a shell-type auger, diameter 4” (10 cm), with a set of rods capable of reaching a depth of 6.00 meters. A square probing grid (100 x 100) m was adopted, establishing a maximum depth of 6.00 m, for operational limitations, due to the heavy rains that fell in the region at the time of the probing, although the deposit has evidence of having much greater depths. 38 holes were drilled, distributed as follows: 26 positive holes (on clean and high-purity sand), 2 holes at the contact interface between clean sand and dirty sand, while the remaining 10 holes were negative, since they intercepted gravel and dirty clayey sand. Fig 3. Positive Holes The positive holes were those that intercepted white, clean sand - reaching a maximum depth of 6.00 m - represented on the map above in green. Fig 4. Contact Holes The contact holes were defined as those that intercepted an intercalation (interdigitation) between clean and dirty sand, whose holes were drilled at a depth of 2.50 m - represented on the map above in blue. Fig 5. Negative Holes The negative holes are those that intercepted dark/yellowish sand, being interrupted after reaching a depth of 3.00 m - represented on the map above in red. Fig 3. Positive Holes The positive holes were those that intercepted white, clean sand - reaching a maximum depth of 6.00 m - represented on the map above in green. 1/3 SAMPLING. All the holes were sampled, however, samples from 13 holes were selected to be sent to the SGS Geosol laboratory for chemical and granulometric analysis, representing 48% of the holes drilled. The counter samples were catalogued and are stored, as are the cores from the other holes, totaling 38 specimens, including samples and counter samples. In the sample collection system, it was defined that the first meter of the profile would be discarded, as it was dark gray sand with roots and organic matter. After discarding the first meter, all the material removed from the hole was quartered, resulting in a reduction in quantity, and two 1 kg samples were taken, each duly labeled. One sample was sent to the laboratory and another counter sample was retained and stored for possible future use. Each sample was subjected to chemical analysis for SiO2, chromogenic elements (Fe and Ti), Al, Ca and Mg. Orientation analyses for other elements indicated values of little significance. The analyses were performed by SGS Geosol using ICP and atomic absorption spectrometry, with detection limits of 1 ppm. Each sample was subjected to dry particle size analysis using 5, 10, 14, 16, 18, 35, 80, 150 and 200 mesh sieves. Minerametric studies (minerals constituting the sand) and determination of physical parameters (density, moisture, porosity and swelling) were performed on samples from the studied occurrence, located near Santa Maria Eterna, whose data obtained, given the similarity of results obtained in nearby areas, were accepted and considered valid, due to the extreme similarity of the deposits and their surroundings. The natural density “in situ” adopted was 1.50 t/m3, including for calculating reserves. Other “in natura” parameters are: porosity = 42% and moisture = 3.3%. ASPECTS OF THE DEPOSIT QUALITY. In the description of the materials used in the auger holes, only the macroscopic visual aspect of the samples taken was taken into account, thus establishing a standard of the material to be computed as useful material in the hole profiles, in the sampling and consequently in the calculation of reserves. Sands with a high visual index of whiteness constitute the useful material, always presenting good contrast with the so-called impure sands, located at the top of the deposit, presenting a dark gray color and generally mixed with organic matter. It was also observed that the impure sand is located in a superficial layer up to 1.0 m deep. Useful sands have a very homogeneous appearance in terms of grain size and whiteness among the materials coming from different holes. Fig 5. Surface layer excavation Fig 5. Surface layer excavation 1/1 The useful sand has a fine and homogeneous grain size, with irregular and angular quartz grains, translucent to transparent (under a magnifying glass), with intervals of fine milky and angular quartz gravel (with occasional fragments of up to 4 mm). Well-formed hexagonal prisms of hyaline quartz up to 2 cm in length have rarely been sampled. The useful sand is very white and pure, with rare presences of gray or yellowish material, and when subjected to manual washing and subsequent drying, the color differences are not noticeable. Variations in humidity or even lighting can cause different impressions of whiteness in the same sample. Fig 6. "In Natura" Sand Fig 7. Manually Washed Sand Fig 6. "In Natura" Sand 1/2 QUALITY. Granulometric analyses carried out revealed that 91.71% of the sampled material was predominantly in the granulometric range of (-10, +200 mesh). CHEMICAL ANALYSIS. The results obtained lead to the following main observations regarding the chemical nature of the sand: Useful sands have a very homogeneous appearance in terms of grain size and whiteness among the materials coming from different holes. The results are relatively uniform for all samples analyzed. 77.00% of the samples analyzed in the deposit present levels higher than 99.51% SiO2; and the main contaminants (Ti, Ca, Mg, Al, Fe, P, Na, Zr and K) do not reach, on average, 704 ppm when converted into their respective oxides. Other elements studied (Mn, Cr, Li, Co, Ni, V and B) do not individually reach 1 ppm. The analyzed ore presents a maximum silicon dioxide (SiO2) of 99.80%, a minimum of 98.95%, a standard deviation of 0.22 and a variance of 0.05, reflecting the homogeneity of the deposit with regard to the SiO2 content. Titanium is the chromogenic contaminant with the highest average content, presenting an appreciable dispersion of values (maximum/minimum and standard deviation), unlike the other elements that show much smaller dispersions. Fe levels are low and relatively uniform, which helps to attenuate the chromogenic impairment caused by Ti. Other elements (Al, Ca, Mg, P, Na, Zr and K), due to their non-chromogenic nature and relatively low and homogeneous contents, do not compromise the quality of the sand for the most common industrial uses. Fig 8. Fig 8. 1/1 MINERALOGY. Regarding mineralogy, leucoxene is mainly responsible for the Fe and Ti contents, being dominant in the fraction smaller than 200 mesh. A discrete portion of Fe and Ti may be included or embedded in the quartz grains. Aluminum (Al), Sodium (Na) and Potassium (K) can be constituents of clay minerals, in the form of aggregates, more abundant in the fraction passing through 200mesh. Zirconium (Zr) probably originating from zirconite, with very fine grain and more abundant in the passing fraction at 200mesh. Calcium (Ca), Magnesium (Mg) and Phosphorus (P) do not show preferential levels in the three granulometric bands, and must be part of minerals included in the quartz grains. The siliceous metadolomite sheets indicate the existence of tiny carbonate granules included in the recrystallized quartz grains. The quartz grains, always angular, are milky to semi-transparent in the fraction retained in 35mesh and hyaline in the finest fractions passing through 35mesh. These grains occasionally appear grayish, due to fine inclusions (rutile, Fe oxides) or encrusted on the surface with Fe and Ti oxides. GEOLOGICAL MODELING. To determine the volume of available sand, several interpretations were made based on the survey data carried out by the company. As a result of the drilling work, a map of the influence of the drill hole grid was generated, with potential depth, indicating the ore contents and contents of the main chromogenic elements iron (Fe) and titanium (Ti) present in each drill hole analyzed. To carry out the modeling process, data from drilling holes drilled into the sand body were used to determine the geometry and thickness of the sand body. Fig 9. (SiO2) Fig 10. (Fe) ppm Fig 11. (Ti) ppm Fig 9. (SiO2) 1/3 GRANULOMETRY. In the sample collection system, it was defined that the first meters of the drilling profiles of each hole would be discarded as they contained roots and organic matter. Two composite samples were taken from each hole (reduced to approximately 1 kg each, by quartering) and sent to the SGS Geosol laboratory. Each sample was subjected to dry granulometric analysis using a Tyler sieve of #20, #28, #48, #100, #200 mesh. SURVEY MESH. A regular 100x100m grid was planned and executed, which proved to be quite adequate, providing good spatialization of the area and demonstrating the continuity of the material. As a result, a map of the survey carried out in the area of this research project was generated. ANALYSES ON THE ECONOMIC FEASIBILITY OF THE DEPOSIT The deposit in the area in question was studied, mapped and subjected to an auger drilling program, with systematic sampling, followed by granulometric analyses by the SGS Geosol laboratory, whose set of samples from the Project were sent to the laboratory after being labeled with their respective names of the holes drilled in the area of interest, allowing the quality of the sand to be assessed, adopting the market's quality criteria and requirements. At the end of the field work and office processing, a measured reserve of 2,408,400 tons and an indicated reserve of 1,206,000 tons were reached, which together result in 3,614,400 tons of good quality useful sand. Below is a summary of the research work carried out on and around the sand deposit, process ANM 871.411/2020. PRELIMINARY AREA RECOGNITION. Aiming to make geological mapping work more consistent, a bibliographic compilation of existing information about the lithologies that outcrop in the study area was made. In the field, geological reconnaissance was carried out across the entire area, aiming to identify potentially promising targets for sand for subsequent geological detailing and definition of the survey grid. DEFINING THE POSITIONING OF THE HOLES. A square auger drilling grid was designed, with spacing of 100 x 100 m, covering most of the surface domain of the useful sand, as illustrated in the maps presented in this report. Each borehole was located using GPS, with wooden markers placed for easy identification by the drilling team. The borehole opening heights were taken using GPS. EXECUTION OF THE SURVEY. The holes were drilled with a shell-type mechanical auger to a depth of 6.00 m. The first meter of the drilling was discarded due to contamination, with only 5 meters being considered useful sand. The sampled material was collected and placed on a clean tarpaulin for quartering, generating, at the end, two composite samples representative of the hole, each weighing approximately 1 kg. GEOLOGICAL MAPPING. The geology, origin, morphology and some boundaries of the sandy deposits in the research area have been well established with the regional research work described in this report. The surface delimitation of useful sandy deposits for the research area was carried out directly in the field, with the aid of GPS, through careful walks along their contacts with yellowish clayey sandy material and white sand. The transition from useful white sand to yellowish clayey sand is clear in the field and can be easily identified from a short distance, based on the following contrasts: Appearance and color of material exposed by anthills; Thinner and more stunted vegetation on useful sand; Typical morphology of trays in useful sand; SAMPLING. A rectangular auger drilling grid was designed, with spacing of 100 x 100 m, covering most of the surface domain of the useful sand. Each survey point was located with GPS and identified with a wooden stake. Every useful sand sample collected by drilling was reduced by quartering into two samples of 1 kg each, with one sample sent to the SGS Geosol laboratory and the other sample retained to meet future needs. CHEMICAL AND GRANULOMETRICAL ANALYSIS. Of the total number of holes drilled in the area, 13 holes, corresponding to 48% of the total, were selected for chemical and granulometric analyses at the SGS Geosol laboratory. The samples were subjected to chemical analysis, including SiO2 (%) and Al, Fe, Ti, Ca, Mg, Na, K, Zr (ppm) by ICP spectrometry. The particle size analysis was performed dry on meshes #5, #10, #14, #16, #18, #20, #35, #50, #80, #140, #200. SAND QUALITY. The granulometric analysis resulted in 53.31% of the material in the range - #35 to + #200. The chemical analysis shows the average contents of SiO2 (99.51%), Al (275.46 ppm), Fe (142.15) ppm, Ti (132.62 ppm), Ca (56.54 ppm), Na (31.08 ppm), K (25.54 ppm), Zr (22.23 ppm), Mg (18.08 ppm). The macroscopic characteristics, granulometry, chemical and mineralogical nature of the sand studied in this area are approximately equivalent to those found in the mining district of Santa Maria Eterna. RESERVE CALCULATIONS. Measured reserve (MR) was calculated considering the product of the useful sand interval sampled in each positive hole, by the area of influence of the hole within the mapped limits of useful sand and by the density of the dry sand base “in situ” (1.50). From the surface area of 32.16 ha and with a useful sand thickness of 5 m, we obtained a measured reserve of 2,412,400 t. From the drilling work it was possible to measure the reserves of useful siliceous sand existing in the area. Fig 12. Fig 12. 1/1 Indicated reserve (IR) calculated by considering half the product of the average thickness of the holes, by the area of influence of the hole within the mapped limits of sand using times the density of the dry sand base “in situ” (1.50). To calculate the indicated reserve, the area immediately below the measured reserve area was used, given that the holes were drilled using a technical option to a depth of 6 meters and, below this depth, there is still the presence of sand, a fact proven by the fact that all the holes drilled in the area did not reach the end of the sand body. Fig 13. Fig 13. 1/1 FINAL CONCLUSIONS Brasil Mineração Ltda, aware of the potential of the silica ore deposit existing within the limits of the polygons defining the processes under its ownership, channeled technical and financial efforts with the aim of quantifying and qualifying the high-purity silica sand deposit that occurs in the rural area of Belmonte, in the vicinity of the district of Santa Maria Eterna. The technical and financial capacity of Brasil Mineração Ltda. is also noteworthy, as it is sufficient to carry out the research work carried out in the area, as well as the studies and analyses of the substance that is the object of the research, namely, high-purity silica sand. It is worth noting that the results obtained provide positive elements that recommend the implementation of an industrial-scale mine for continued supply to the consumer market. Intended to make good and rational use of high-purity silica sand ore in the area under study, it intends to implement a Processing Unit for the ore of interest. The chemical and granulometric characteristics of the ore, the existing logistical conditions in the project's surroundings, the low operating cost and the growing demand for high-purity silica sand to meet the demands of the energy transition encouraged Brasil Mineração to move forward in the search for regularization and in-depth studies in the area. The research carried out ensures reserves that support operations for 20 years with a production of 120,000 t/year in highly competitive conditions on the global scene. GALLERY Geologia Local Descrição dos Buracos de Amostragem Aspectos do Depósito Viabilidade Econômica Conclusões Finais Galeria
- Mica | Brasil Mineração
High-quality Mica for industrial applications, including insulation, paints, plastics, and rubber. BRM ensures consistent purity, particle size, and reliable export supply. Mica Mineral Powder for Industrial, Commercial, and Agricultural Excellence Unlock the full potential of a high-performance mineral trusted across global industries. From precision manufacturing to soil improvement, our Calcium Carbonate delivers purity, consistency, and versatility in every shipment. Precision. Performance. Proven Versatility. Calcium Carbonate is one of the most widely used mineral compounds in the world, and for good reason. Extracted from select deposits and refined through advanced processing, our material achieves high purity and fine granulometry standards suitable for multiple industrial uses. With CaCO₃ content above 52%, it ensures superior performance in formulations, fillers, coatings, and pH control. In agriculture, it enhances soil quality and nutrient availability, improving crop yields sustainably. In the manufacturing sector, it serves as a critical raw material in plastics, paints, paper, and construction materials, where consistent particle size and chemical stability are essential. Our calcium carbonate is also available in specialty grades suitable for food, cosmetic, and pharmaceutical applications — meeting rigorous safety and quality standards. We maintain over 400,000 tons of available reserves, ensuring prompt delivery for both recurring and large-scale projects. Whether your need is bulk raw material or tailored supply contracts, our logistics team is ready to meet your demands with precision and efficiency. Let us help you optimize your processes with a mineral solution trusted across industries — reliably, sustainably, and at scale. Inquire Now Click below and ask us about this product. Contact Us
- Magnesite - Brumado/BA | Brasil Mineração
Magnesite from Brumado, Bahia — one of Brazil’s key regions for industrial minerals. BR Mining offers access to high-quality magnesite suitable for diverse applications. Magnesite Brumado - BA The area of mining process no. 870.963/2021 occupies 171.96ha and is located in the municipality of Brumado, Bahia, Brazil. HIGHLIGHTS RAIL LINES The VLI train line in Brumado, Bahia, plays a crucial role in the region's logistics and industrial operations, particularly supporting the transportation of minerals such as magnesite and other goods. VLI, a major logistics company in Brazil, integrates railways, ports, and terminals, optimizing the flow of raw materials and finished products across the country. GRADES Preliminary studies indicate that the MgO content in the region ranges between 90% and 94%, highlighting its exceptional quality. This high concentration underscores the region's potential and explains why major producers have chosen it as a hub for magnesite extraction since 1943. LOCATION The three largest companies involved in magnesite extraction in Bahia—IBAR Magnesite, RHI Magnesite, and IMI FABI—are strategically positioned near key mining region. IMI FABI stands out for its close proximity to mineral resources. This strategic clustering enhances logistical operations and supports the state’s prominence in the magnesite industry. GREEN BELT BRUMADO The GB Brumado represents the most prominent geological unit for a positive metallogenetic potential in the region. Below are the main lithotypes of the lower, middle, and upper sequences exposed in the Serra das Éguas, where the ANM process is located. Tune in to our exclusive podcast showcasing the Magnesite deposit in Brumado, Bahia. Deep Dive BRM Podcast 00:00 / 15:14 LOCATION AND LOGISTICS The mining process area No. 870.963/2021 covers 171.96 hectares and is located in the municipality of Brumado, Bahia. The access from the nearest city (Brumado) to the visited area is 13 km, via a well-maintained road comprising 4 km of asphalt and 9 km of well-maintained dirt road. It is important to note that the entire dirt road segment is maintained by the companies IMI FABI and RHI Magnesita, which produce talc and magnesite from mines located on the same mountain range as the ANM process area visited. Brumado is located approximately 540 km from the state capital, Salvador, Bahia. Fig 1. Local geology with rolling mesh and identified lithologies. Fig 1. Geographical Location of the Visited ANM Process Brumado offers excellent infrastructure in its urban center, providing robust support for mining projects of all sizes. The city features accommodations such as hotels and inns, workshops, restaurants, banks, quality medical services, and other relevant and positive aspects that make it well-suited for industrial and mining activities. GEOLOGICAL CONTEXT AND REGIONAL MINERAL POTENTIAL Regionally, the visited process is situated within a Granite-Greenstone geological context, specifically associated with the Brumado Greenstone Belt (GB Brumado), located in the southern sector of the Gavião Block, São Francisco Craton. The ANM process 870.963/2021 covers roughly 172 hectares over the Serra das Éguas, the main metavolcanic-sedimentary rock belt among the three subdivisions of the Brumado Greenstone Belt. This highlights an interesting preliminary potential due to the presence of large talc and magnesite deposits in the vicinity. Granite rocks and gneiss-migmatites are also found in the macro-region, though they have less relevance to the mineral potential of the visited area. Fig 2. Regional geology highlights the distribution of the Brumado Greenstone Belt and the gneiss-migmatites of the crystalline basement, which are the main regional influences in the area. As described, the Brumado Greenstone Belt represents the most significant geological unit for a positive metallogenic potential in the area. In this regard, the main lithotypes of the lower, middle, and upper sequences exposed in the Serra das Éguas, where the visited ANM process is located, are as follows. Lower Sequence: Ultramafic komatiitic flows, serpentized, tremolitized, and talcified, with narrow bands of BIF (banded iron formation), succeeded by mafic toleitic flows, amphibolitized, and horizons of calc-silicate rocks and felsic schists (bitotite and garnet). Middle Sequence: Felsic schists (metatuffs / metapelites / metavolcanics), cherts, and quartzites. Upper Sequence: A succession of metasediments represented by metacarbonates, quartzites, and BIFs. This sequence includes limestone, dolomite, and magnesite deposits. REGIONAL MINERAL OCCURENCES. Figure 3 below, illustrates the large number and frequency of talc and magnesite occurrences and deposits in the evaluated region, which have been cataloged by CBPM (Bahian Company of Mineral Research) and CPRM/SGB (Geological Service of Brazil). Other substances occur within the same geological context; however, they do not exhibit significant volume or quality like the aforementioned minerals. The operations of IMI FABI (talc extraction) and RHI Magnesita (magnesite extraction) in the same mountain range and geological context further confirm the presence of a highly positive regional mineral potential for the ANM process in question. Fig 3. Regional Mineral Occurrences Cataloged by CBPM and CPRM in the State of Bahia. Highlight to the very large volume of magnesite and talc concentrated in the study area, located to the west of Brumado (Serra das Éguas). In addition to the substances mentioned above, the field visit revealed evidence of rocks that may indicate potential interest in other occurrences in the area, such as quartzite and quartz, which will be discussed in the following chapter. Fig 4. Talc and magnesite mining operations are active in the macro-region of the visited area. Notably, all extractions occur within the same topography, known as Serra das Éguas. LOCAL GEOLOGY The field survey aimed to identify the most representative geological units on a regional scale but within the mining process area. Combined with pre-existing data, this allowed for the interpretation of the local mineral potential. In this context, 21 points were visited in the field, subdivided into "control" and "outcrop" categories. At these points, descriptions of the materials found, structural geology, interpretation of topography/relief/drainage, soil analysis, and sample collection were conducted. Fig 6. Map showing the locations of data collection points for geological reconnaissance. CRYSTALLINE BASEMENT ZONE – GNEISSES. Outcrops of rocks from this unit are frequent in the central sector of the visited process area, but they do not exhibit high mineral potential due to their compositional characteristics. These rocks are mostly stretched gneisses (with variations to augen gneisses) aligned along a local NNE/SSW trend ranging from N205° to N175°. They form structural contacts with other lithotypes of the metasedimentary unit of the Brumado Greenstone Belt, such as quartzites and calc-silicate rocks. The cataloged outcrops can essentially be described as: Crystalline rocks with high-grade penetrative foliation, composed of biotite, quartz, feldspars/plagioclase, and ferromagnesian minerals. They commonly feature quartz veins and narrow quartz stringers, particularly near contacts with adjacent units, indicating increased associated deformation. Fig 7. Examples of outcrops from the crystalline basement unit, central sector of the visited ANM process. METASEDIMENTS ZONE (BRUMADO GB) When interpreted alongside regional geological information, it is possible to infer that the field data represent all three stratigraphic sequences of the Brumado Greenstone Belt (lower, middle, and upper), as a wide variety of lithotypes were identified. This delineated unit presents the highest mineral potential in the area, justified by its metavolcano-sedimentary Greenstone nature (notably evidenced by metallic features observed in the field, such as the presence of manganese and iron metallic oxides) and metasedimentary rocks like well-recrystallized quartzites. Based on these observations, the main lithotypes identified during the geological reconnaissance are as follows: Calc-silicate rocks, characterized by a greenish color, very fine grain, and the presence of oxides in fracture planes. Foliated rock and quite representative within the unit. Quartzites and metarenites ranging from white to gray, with associated quartz veins and levels of chert present (likely between lithotype transition zones). BIFs (iron formations) present in a more localized manner, primarily consisting of metarenites/quartzites with thin laminations of hematite-rich layers. However, macroscopically, these rocks do not show significant potential for iron ore due to their volume/dimensions and modal composition with a high sterile/ore ratio. This unit is where the talc and magnesite extractions are located in the region, further demonstrating that these lithotype intercalations and their alterations provide greater mineral fertility within the Serra das Éguas. In the northeastern sector of the polygon, for example, points were visited that demonstrated high potential for magnesite. FINAL CONCLUSIONS ABOUT THE GEOLOGY AND IDENTIFIED MINERAL POTENTIAL, it can be concluded that: The region of the study area presents good mineral potential given the geological characteristics of the Brumado Greenstone Belt and Serra das Éguas.. The metasediment unit is the most promising, containing occurrences of metals, quartzites, and magnesite. ABOUT THE STRATEGIC POINTS, it is important to highlight that: The logistics for the potential extraction operation in the area are very favorable, given the existing infrastructure of roads, water, and energy, due to the active operations of the talc and magnesite mines nearby. GALLERY Localização e Logística Contexto Geológico Geologia Local Conclusões Finais Galeria
- Manganese - Campo Formoso/BA | Brasil Mineração
Discover high-grade Manganese from Campo Formoso, Bahia. BR Mining offers reliable sourcing and insights into one of Brazil’s key mineral regions. Manganese Campo Formoso - BA The area of mining process no. 870.997/2021 occupies 73.36ha and is located in the municipality of Campo Formoso, Bahia, Brazil. HIGHLIGHTS LOGISTICAL FRAMEWORK The location is suitable for water and energy supply, access, and transportation of ore, including the possibility of railway transport via the FCA – Ferrovia Centro Atlântica. If rail transport is not viable, highway transport to the nearest port is also plausible. The presence of the FCA railway is particularly valuable for large-scale manganese ore transport. GOLOGICAL CONTEXT Manganese concentrations in the region have a high frequency of other valuable metals associated with them such as iron and copper, and high-purity manganese is often found within high strain zones. The geological context and structures suggest a positive potential for other metallic elements like gold and chromium. LOCATION The region has excellent existing infrastructure to support the project. This includes well-maintained roads, hotels, specialized workshops, heavy equipment rentals, and other necessities such as banks and medical services HIGH MINERAL POTENTIAL There is a history of mining and prospecting of various substances including gold, quartz, gemstones, chromium, limestone, manganese, and quartzite in nearby locations. The Serra de Jacobina itself has significant metallogenetic potential, indicating diverse mineral substances may be found through more detailed research. Tune in to our exclusive podcast showcasing the Manganese & Quartzites deposit in Belmonte, Bahia. Deep Dive BRM Podcast 00:00 / 15:20 LOCATION AND LOGISTICS The area of mining process No. 870.997/2021 covers 76.36 hectares and is located in the municipality of Campo Formoso, Bahia, near the municipal headquarters. The nearest city is Campo Formoso itself, located 7 km away, with 5.5 km on well-maintained asphalt and 1.5 km on a dirt road, also in good condition. Campo Formoso is approximately 410 km away from Salvador, Bahia. Fig 1. Geographical Location of the Visited ANM Process Fig 1. Local geology with rolling mesh and identified lithologies. Fig 2. Map of main access routes to the visited site, highlighting the district of "Missão do Sahy," where the southern route begins (featuring gentler slopes in the mountainous terrain). The Campo Formoso region offers excellent infrastructure to support a mining project. In addition to the city having various options for hotels/guesthouses, specialized workshops, heavy equipment rental, and other positive aspects (such as banks and medical services), the neighboring city of Senhor do Bonfim is only 26 km away and also provides options to meet all the needs of a small-scale mining operation. Fig 3. The images illustrate the access routes to the visited area, consisting of dirt rural roads in good condition and mountainous terrain. GEOLOGICAL CONTEXT AND REGIONAL MINERAL POTENTIAL The visited mining site is located within the Contendas-Jacobina-Mirante Lineament, in the central part of the São Francisco Craton. The formation of this lineament, characterized by a mountainous relief extending 500 km in a NNE-SSW direction, is associated with the tectonic overlap of the Itabuna-Salvador-Curaçá Belt over the Jequié Block, both of which rest upon the Gavião Block. This geotectonic origin resulted in numerous deformational events that altered rocks, created geological structures, and enabled diverse mineral occurrences/deposits. This is the regional context of the so-called "Serra de Jacobina." As a result, the entire geographical terrain surrounding this mountainous zone exhibits favorable conditions for mineral fertility. Fig 4. Regional geology of the area under focus by the ANM process. Note that the predominant geological influence in the visited region is the Cruz das Almas Formation, which belongs to the Jacobina Group The main rocks present in the visited region that influence its geology are from the Cruz das Almas Formation (composed of metavillites, sandstones, quartzites, and schists) and the Missão do Sahy Formation (Metachert, manganiferous formation, BIFs, and phyllites). Mineral extraction is common in the region, with some cities having over 10 decades of activity in mining and prospecting, such as gold and quartz mining in Jacobina, gemstones in Pindobaçu, chromium and limestone in Campo Formoso, manganese in Senhor do Bonfim, and quartzite in Jaguarari. In this regard, the surroundings of the visited area are marked by a high mineral potential for various types of substances, as exemplified below, which are of great relevance for the technical observations that will be described in this report. Fig 5. Map of mineral occurrences, with a yellow highlight detailing the region of the visited area. REGIONAL OCCURRENCES OF MANGANESE. In the context of the Jacobina mountain range, which includes the surroundings of Campo Formoso and Senhor do Bonfim, the metallogenesis of manganese is similar: this substance was concentrated through hydrothermal processes along shearing structures, an origin that indicates characteristic for the quality of the ore in general: a high frequency of other metals associated with manganese, such as iron and copper. However, within high strain zones of the mineralized layer, it is usually possible to observe boudins with high-purity massive manganese. Fig 6. Example of a manganese mineralized zone in the region. In RED: Zone with Iron contamination. In BLUE: Zone rich in massive manganese. REGIONAL OCCURRENCES OF GOLD AND OTHER METALS. However, within high strain zones of the mineralized layer, it is usually possible to observe boudins with high-purity massive manganese. Some of the most famous metallic occurrences within the Serra de Jacobina are gold ore deposits, which are primarily more frequent from the city of Pindobaçu to the south of the mountain range (towards Miguel Calmon), where metaconglomerates and quartzites altered by hydrothermal activity host most of the gold mines and prospecting sites. The northern sector of the Serra de Jacobina, where the visited ANM process is located, near Campo Formoso, does not have a history of gold prospecting or extraction. However, the geological context and structures observed in the field suggest the possibility of positive anomalies, as the same geological processes of fluid alteration and element reconcentration occurred in the rocks present there. The existence of chromium deposits and copper occurrences less than 7 km away from the area, within the same geological context, also support the hypothesis of a positive regional potential for other metallic elements in the area. EXTRACTION OF QUARTZITES – QUARRIES IN OPERATION. In the last two decades, the Serra de Jacobina has been extensively explored for the extraction of ornamental stones, specifically quartzite. One of the most notable geological characteristics of the rocks in this mountain range is the concentration of Fuchsite in the quartzites and conglomerates of the Serra do Córrego, Rio do Ouro, and Cruz das Almas Formations, which gives the rocks a greenish color and adds greater value to the extracted material. The local topography allows for large volume deposits for quarry openings, and the center-north location in the state of Bahia favors the logistics of transporting these materials to other regions, such as Espírito Santo. The visited ANM process includes rocks of this nature, which may present feasibility for a quartzite extraction project. The cities of Jaguarari, Campo Formoso, Senhor do Bonfim, and Pindobaçu are examples of producers of blocks and are located near the evaluated region. LOCAL GEOLOGY The field activities allowed for the definition of 3 main geological compartments within the visited process, which are not defined here as Formations or individual units, but rather as zoning of distinct mineral potentials, making it easier to interpret and plan for the utilization of possible substances/ores in the area. ZONE OF MANGANESE-BEARING METASEDIMENTS. This zone covers the southern sector of the polygon and concentrates the main manganese occurrences in the area, with old prospecting sites and several outcrops enriched in the metal. As mentioned in the chapter above, the manganese concentrations in the Serra de Jacobina are associated with geological structures that altered the rocks and channeled fluids enriched with silica, manganese, iron, and other metals. The same typology was observed in the occurrences cataloged within the area: fine metasediments, such as phyllites and oxidized arkosic sandstones, sheared, with the presence of quartz veins/veinlets and many manganese and iron oxides precipitated in pockets and/or fracture planes within the rock, with pyrolusite and psilomelane being the main ore minerals present. In addition to this primary typology, there are also supergenic manganese concentrations above the enriched layers due to surface processes. This material, although of good concentration, has a smaller volume. The zone of manganese-bearing metasediments does not limit the occurrence of the metal to this region, but rather demonstrates the area within the polygon with the best characteristics of high strain shear zones containing manganese ore. It is in this zone that new exploratory studies regarding this ore should be focused. "Old excavation at point P26." "Old excavation at point P26." "Boulders of ore associated with supergene enrichment in soil." "Boulders of ore associated with supergene enrichment in soil." Example of a block of massive ore with few contaminants. Example of a block of massive ore with few contaminants. "Old excavation at point P26." "Old excavation at point P26." 1/3 "Outcrop of in situ ore N000° (N-S) at point P3." "Outcrop of in situ ore N000° (N-S) at point P3." "Showing details of iron oxide contamination in the material, a common characteristic of manganese i "Showing details of iron oxide contamination in the material, a common characteristic of manganese in the region." "Showing details of iron oxide contamination in the material, a common characteristic of manganese i "Showing details of iron oxide contamination in the material, a common characteristic of manganese in the region." "Outcrop of in situ ore N000° (N-S) at point P3." "Outcrop of in situ ore N000° (N-S) at point P3." 1/3 ZONE OF METARENITES AND QUARTZITES. This zone is bounded to the south by manganesiferous metasediments and to the north by crystalline basement rocks, thus occupying the entire central region of the mining process. The zone of metarenites and quartzites comprises a wide variety of siliciclastic rocks; however, ferruginous (oxidized) metarenites, white metarenites, and various quartzites (light-colored, greenish, and grayish) predominate. In addition to these rocks, large quartz veins are noticeable, along with fault systems, breccias, fractures, and shear zones, which may contain various mineralizations, such as manganese, gold, and other metals. Outcrop of dark gray quartzite at point P4 Outcrop of dark gray quartzite at point P4 Large white quartz vein identified near the ANM point at point P29 Large white quartz vein identified near the ANM point at point P29 Example of very fine-grained, heavily fractured oxidized metarenite at point P9 Example of very fine-grained, heavily fractured oxidized metarenite at point P9 Outcrop of dark gray quartzite at point P4 Outcrop of dark gray quartzite at point P4 1/3 The compartmentalization of this zone occurs along rock layers dipping steeply to the east, with layer orientation following the trend of the Serra de Jacobina, and foliation between N060° and N350°. Contact regions, where different lithotypes meet, are typically associated with structures that alter the chemical composition and physical characteristics of the rock. For this reason, in the northern contact zone with crystalline basement rocks, for example, alterations such as sericitization, kaolin formation, and other completely altered metasediments were observed. The zone of metarenites and quartzites thus presents a positive potential for: Identification of various metallic occurrences; Identification of quartz veins with high purity; Identification of rock masses for the extraction of quartzite blocks; Identification of other non-metallic substances associated with ductile and brittle geological structures. Fig 7. Outcrop of metasediments in a contact zone between geological units, with sheared, altered, and deformed rocks, including the presence of quartz veining and iron oxides—positive characteristics for identifying metals such as gold. Point P4. PREVIOUS MINERAL POTENTIAL AND EXTRACTION OF IDENTIFIED SUBSTANCES According to the preliminary data obtained, field data, and mining history information, it was possible to determine that the central and southern regions of the visited polygon are the ones of greatest interest in the short term for the advancement of various mineral exploration activities, as these areas host the main occurrences of manganese ore, quartzites, and other possible substances, as already described above. Based on this information, the following interpretations are made for each mineral possibility: MANGANESE ORE It presents positive and very promising mineral potential; however, some characteristics of the existing ore must be taken into consideration before determining the feasibility of its extraction, such as: Chemical quality of the ore: Although the samples appear to have few impurities, such as iron oxide and silica, the hydrothermal association of this metal leads to the possibility of contamination, as described in item 2.1. A more representative chemical characterization of the deposit is needed beyond the CHIP samples already collected in previous stages. Volume and waste/ore ratio: The mining process visited, in the southern sector, where the manganese ore occurs, is narrow, about 120m, which prevents other promising outcrops from being included in the reserve calculation for the deposit. In addition to this information, there is also the waste/ore ratio, which varies significantly at the visited points and may influence the calculation of the recoverable ore volume. In this regard, further research stages are required, which will be described and suggested. Fig 8. Example of a high-quality manganese ore sample obtained from the visited area, but still with the presence of impurities such as silica (yellowish colors). From a strategic perspective, the manganese ore is located in an area with favorable characteristics for water and energy supply, access, and ore transportation (including via railway, with the FCA – Ferrovia Centro Atlântica being present in Campo Formoso). Additionally, according to Mr. Jose Raimundo (guide during the field visit), the main surface owner is in agreement with the progression of research and extraction activities. QUARTZITE It shows positive potential due to the high likelihood of significant volume in different locations, as well as the surface characteristics of some outcrops found, such as point P30, which represents a micro-region with the presence of green quartzite (currently in high demand in the ornamental stone market). Despite these positive characteristics, when considering the idea of producing blocks from this material, it is necessary to take into account the constant presence of brittle structures (fractures and faults) that could compromise quarrying and the opening of pits, which were observed in many of the visited outcrops. Fig 9. Illustration of varied quartzite samples from different outcrops in the visited area. From a strategic perspective, access for production transportation, depending on the location within the area, would be via a secondary road to the south, through routes leading to the district of "Missão do Sahy," due to the steep slopes of the roads heading north toward Campo Formoso. Aside from this aspect, the area presents technical justifications for further development and investment in new research phases for this substance. OTHER METALS AND MINERAL SUBSTANCES As explained in the sections above, the local geological context allows for the possibility of mineralization of other metals in the rocks and geological structures. For example, samples were collected from a brecciated zone with manganese precipitation at point PXX, which, in addition to this material, includes evidence of hydrothermal activity—very promising characteristics for the identification of volatile elements, sulfides, and other base metals, for instance. Fig 10. It is possible to see in detail the angular fragments of white metarenite, quartz veins, and associated oxides. The Serra de Jacobina itself denotes significant metallogenetic potential, allowing for the identification of a wide variety of mineral substances in more detailed research stages. In the case of the area in focus, there is, for example, a possibility, albeit small, of quartz, gold, and chromium. ROCK SAMPLING During the field visit, 8 samples were collected, subdivided according to the objective of each, based on the principle of a more detailed description in the office, with cataloging for sending to the laboratory and specific chemical tests in the case of manganese ore and other specific rocks, as well as polishing tests to verify the aesthetic quality of the quartzites. GENERAL CONSIDERATIONS The previous chapters clearly indicate the existence of positive prior mineral potential for manganese ore and quartzite. Thus, the scenarios outlined below encompass research activities designed to advance work on both possibilities. MANGANESE ORE Due to the geological characteristics of the deposit type, as mentioned in item 6, it is recommended that complementary research stages be carried out for a more detailed assessment of volume, depth, surface occurrence, and mineral chemical quality. To achieve this, it is expected, in addition to a detailed mapping of the rocks and structures in the region, the development of sampling, and, at a minimum, geophysical acquisitions/modeling. ORNAMENTAL ROCK - QUARTZITES The sandstone and quartzite zone includes good occurrences and outcrops of quartzites with strong potential for advancing research, which should focus on the surface spatialization of the rocks and, mainly, on the structural characterization of the massifs. Detailed mapping should be used to identify the behaviors of the main fracture and fault families that could compromise the potential quarrying/extraction of blocks. OTHER OCCURRENCES Due to the positive potential of the region for the presence of various substances, a more detailed survey of the entire area is necessary, which will allow for the determination of the feasibility of advancing to more specific stages for other types of ore, such as those previously mentioned. FINAL CONCLUSIONS ABOUT THE GEOLOGY, it is concluded that: The study area is located in a region with occurrences of metasedimentary rocks and geological structures of high mineral potential from the Jacobina Group, predominantly consisting of quartzites, metarenites, and rocks altered by hydrothermalism. The geology of the area is favorable for the identification of different substances and ores. ABOUT THE CURRENT MINERAL POTENTIAL, it is concluded that: With the reconnaissance data, it was possible to define 3 zones of distinct mineral potentials, with the southern sector being of the greatest interest due to the large occurrences of manganese ore. The other two zones are secondary in terms of mineral potential, but they may still indicate the existence of economically viable substances (such as quartzites). Despite being promising, especially for manganese, the real mineral potential of the visited ANM process will be defined after the advancement of the activities proposed in Tables 3, 4, and 5, and the results presented, where the best strategy for continuity, production, or interruption of the projects will be determined. ABOUT THE STRATEGIC POINTS, it is important to highlight that: The logistics for the transportation of a possible block and/or gold extraction should be well planned, but initially, it presents good development conditions. The presence of FCA – Ferrovia Centro Atlântica Railway, 8 km away, facilitates the design of a large-scale transportation logistics for manganese ore. However, if this is not a viable option, transportation by highways to the nearest port (Aratu – 390 km) is also plausible. The area is close to a power source, while water should be sourced from the surrounding areas, without major difficulties. GALLERY Localização e Logística Contexto Geológico Geologia Local Potencial Mineral Anterio Amostragem da Rocha Considerações Gerais Conclusões Finais Galeria
- Limestone & Marble - Itapebí/BA | Brasil Mineração
Explore premium Limestone and Marble from Itapebí, Bahia. BR Mining connects you to high-quality Brazilian natural stone, ideal for construction and design projects. Limestone & Marble Itapebí - BA The area of mining process no. 872.297/2021 occupies 557,15ha and is located in the municipality of Sento Sé, Bahia, Brazil. HIGHLIGHTS LOCATION The area is located within a region known for its mineral potential. The report notes that the macro-region of the referenced mining area contains various active mineral extraction sites for marble and limestone, suggesting a minimum geological potential nearby. This region is part of the "Araçuaí Belt," which is known for its complex tectonic structures formed during the Neoproterozoic era. Additionally, the specific area of the mining process is within the Rio Pardo Group, which is favorable to the presence of carbonate and quartzitic rocks GOLOGICAL CONTEXT The eastern sector of the area shows promising signs for mineral exploration. The report specifies that the eastern sector has a substantially greater number of outcrops, which allowed for the interpretation of varied metasediments, quartz veins, and varying degrees of metamorphism. The rocks identified in this sector could potentially be sources for dolomitic or calcite limestone and high-purity quartz ECONOMICAL FEASIBILITY The presence of high-purity quartz veins is a significant positive finding. The report indicates that veins of high-purity quartz were observed in various points in the eastern sector, and that some of these veins show high purity due to their crystallinity and color. The report also notes that point P17 illustrates a high silica content. The report also states that these veins are common near metarenite occurrences HIGH MINERAL POTENTIAL There is preliminary mineral potential for both limestone and quartz, making further research worthwhile. The report concludes that there is a positive preliminary mineral potential for limestone and quartz. The report recommends conducting preliminary chemical tests on the collected samples of limestone to determine the viability of further technical research. It also recommends a more detailed assessment of the quartz occurrences to understand the feasibility of a mineral production project Tune in to our exclusive podcast showcasing the Limestone & Marble deposit in Itapebí, Bahia. Deep Dive BRM Podcast 00:00 / 12:21 GEOLOGICAL CONTEXT AND REGIONAL MINERAL POTENTIAL The visited mining area is part of the regional context of the "Araçuaí Belt," a Brasiliano fold belt that borders the São Francisco Craton through large zones of complex tectonic structures formed during its Neoproterozoic evolution. The Araçuaí Belt is extensive and covers a significant portion of southeastern Bahia and northeastern Minas Gerais. The visited area, more specifically, is located within the Rio Pardo Group, in a region close to the contacts between crystalline basement rocks and more recent sedimentary cover rocks. RIO DO PARDO GROUP. The Rio Pardo Group comprises metasedimentary rocks formed in continental, restricted marine, and open marine depositional environments. Within the group, there are two sub-basins: a northern one and a southern one, with the latter being of greater interest in this evaluation. The southern sub-basin of the Rio Pardo Group consists of three distinct rock formations: the Panelinha Formation, Serra do Paraíso Formation (where the evaluated area is located), Água Preta Formation, and Camacan Formation. Of all the formations mentioned, the Serra do Paraíso Formation is the most recent, having been the last to be deposited in the sedimentary basin of origin. It is composed mainly of various types of carbonates (with varying degrees of metamorphism) and quartzites, precisely as observed during the field visit for the area’s assessment. Fig 2. Regional geology of the area of the ANM process in focus. Note that the entire polygon is under the influence of the Serra do Paraíso Formation, composed of carbonates and quartzites. REGIONAL POTENTIAL FOR CARBONATE PRODUCTS. As mentioned in the "Rio do Pardo Group" section, the area has a regional context favorable to the presence of carbonate and quartzitic rocks, with the former being major sources of marble or limestone occurrences, for example. The macro-region of the referenced ANM process contains various active mineral extraction sites for marble and limestone, which already suggests some minimum geological potential nearby. Figure 3 below illustrates the location of the mining operations within the region of polygon 872.297/2021. Fig 3. Active ANM processes under mining application or concession, highlighting three operations that produce marble and limestone very close to the evaluated ANM process. WORK METHODOLOGY The methodology applied in this work is divided into four stages: (1) data acquisition, compilation, and analysis of existing data; (2) field surveys; (3) interpretation of information and discussion; and (4) report preparation. The first stage consisted of gathering information on the regional and local geology (focusing on the Rio Pardo Group and Serra do Paraíso Formation, which are part of the regional context of the Araçuaí Belt), where metasedimentary rocks are found, associated with basin closure structure and rock deformation/metamorphism; Various maps were developed after the photointerpretation of satellite images and SRTM data from the Topodata project with 30m resolution. All maps were processed and georeferenced in ArcGIS 10.8 software. The field surveys lasted 2 days and took place in October 2023. Outcrops and control points within and outside the mining process were visited. In each location with favorable physiographic features, descriptions of local structural geology and strategic aspects were made, along with sample collection (when necessary); In the third stage, interpretations of field data, bibliography, and interpolation with maps were developed; Finally, all technical information was processed, interpreted, and discussed to support the preparation of this report and the standardization of the data. LOCAL GEOLOGY The identification of the predominant rocks in the ANM process was made easier after subdividing the area into two sectors: West and East. This was due to the distinct differences in relief, soil, and land use, as well as the mineral potential of each, which shows varying levels. Therefore, the local geology will be described considering the two polygons, which can be more clearly seen in Figure 5. Fig 5. Map of the location of the subdivided sectors in the visited ANM process. GEOLOGY OF THE WEST SECTOR. Considering the west and east sectors, the geology of the visited ANM process can be characterized as a single unit, where the lithotypes vary according to their mineral composition but maintain the same metasedimentary origin. However, the major difference between the sectors outlined here is the degree of exposure of the outcropping rocks, as in the west sector, there are virtually no exposed rocks due to the topography and large eucalyptus plantations of Veracel Celulose. Points P12 and P14 were the only ones that allowed for the observation of rock within the survey conducted in this west sector, and they showed that the rocks present are basically: Foliated limestones, gray in color with very fine granularity, making it difficult to define their degree of purity, but apparently showing to be impure limestone with the presence of silica. Samples showed little reaction to hydrochloric acid, making it an inconclusive test for interpreting its composition. Iron-rich concretions in lateritic rocks, with iron oxides present, giving cohesion to the brownish-colored sand-silt matrix. Fragments of angular quartz are also common, likely originating from superficial fragments of quartz veins in the region. a) Outcrop of impure limestone at point P12, and b) Large boulder on the side of a hill with lateritic concretion, point P14. Correlation of map data and bibliography with field observations allowed us to infer that the geological pattern below the surface/soil in the west sector remains similar, even without many directly observed data. GEOLOGY OF THE EAST SECTOR. Unlike the previous sector, the eastern region of the visited ANM process is characterized by land use focused solely on livestock farming, with a landscape of extensive pastures, hills, and valleys (Figure 3). Fig 3. Overview of the physiographic aspects of the terrain in the East sector, viewed towards N200° from point P28. The physiographic characteristics of this sector allowed for the identification of a substantially greater number of outcrops, from which it was possible to interpret that they are rocks from the same micro-regional context, with varied metasediments, quartz veins, and varying degrees of metamorphism. In this regard, it is worth highlighting: Limestones: similar to those described in the west sector; however, they occur here with a greater variation in purity, tending towards calcarenite with fine granularity. a) and b) illustrate outcrops of impure limestone tending towards calcarenite, light in color and heavily fractured. Point P15. Metarenites: they occur friable and weathered, but certainly contribute a large volume to the metasediment package in the area, being in gradual contact with the limestone layers. They are light-colored (white to beige), with fine granularity and a composition mainly composed of sub-rounded quartz grains. a) and b) illustrate outcrops of friable metarenite at point P16. Quartz veins: these are common near the occurrences of metarenites, which are likely correlated. These veins were observed in outcrops up to 2 meters thick and/or boulders of small and large dimensions at various points. The physical characteristics of the material stand out here, showing a high degree of purity due to its crystallinity and white/transparent color. a) and b) illustrate outcrops of quartz veins, common in the eastern sector of the visited process. Points P13. PREVIOUS MINERAL POTENTIAL OF THE AREA AND ROCK SAMPLING Based on the data obtained, field data, literature, and mining history, it was possible to define that only the Eastern sector of the visited process deserves attention regarding the advancement of exploratory research. The rocks identified in this sector and described in item 5.2 can be a mineral source for the substances: dolomitic limestone or calcite limestone and high-purity quartz, and based on these informations, the following interpretations are made for each possibility: CALCIUM CARBONATE OR DOLOMITE AND MARBLE. The presence of carbonate rocks in the area allows for the possibility of anomalous levels of magnesium and/or calcium, giving rise to calcium carbonate minerals for soil correction and still zones of greater degree of metamorphism that allow for the formation of massive marble deposits. The occurrence of these rocks in various points also allows for the interpretation that there may be volumes beneath the surface that could enable some type of production, however, this type of mining tends to be more profitable and less costly when of the positive type, and the terrain of the eastern sector tends to provide a negative front. Another factor of great relevance for evaluating the viability of this type of undertaking is the logistics and local market, which in this case, does not show a very favorable disposition due to the poor conditions of access, a distance superior to 7km to asphalt and proximity of large quarries in operation, which present better logistics and excellent deposits for extraction/production of the mine. Finally, it is primordial to understand the chemical characteristics of the samples/rocks collected, these results are what can define the path to be followed in the course of a possible mining project of calcium carbonate. HIGH-PURITY QUARTZ. Veins of high-purity quartz were visualized in various points of the eastern sector of the ANM process visited, and in some of them it was possible to observe macroscopically a high purity, given the crystallinity and coloration of the material. For example, point P13 illustrates a vein of large proportions found, while point P17 illustrates the chemical quality of the rock, which appears to have a high silica content (see Figure 6 ). Preliminary information is not sufficient to understand the potential volume of these veins, however, the analysis and chemical characterization of these veins is fundamental for determining whether to advance or not with the idea of more detailed research on this substance. ROCK SAMPLING. During the field visit, 8 samples were collected and subdivided according to the purpose of each one, based on the principle of providing a more detailed description in the office, with cataloging for laboratory submission and specific chemical tests for limestone and quartz. GENERAL CONSIDERATIONS The previous chapters make it clear that there is a positive preliminary mineral potential for limestone and quartz. Therefore, the scenarios outlined below encompass research activities designed to advance work on both possibilities. LIMESTONE. Due to the geological possibilities of various metallic anomalies in this type of rock, the most appropriate course of action is to conduct preliminary chemical tests on the collected samples to then determine the viability of proceeding with new technical research stages. QUARTZ. As outlined in the items above, the quartz occurrences in the eastern sector deserve attention from the perspective of a more detailed assessment of their potential, as the initial visit already indicated its presence in different areas, all with good physical characteristics. Based on these observations, target definition will be essential to understand the feasibility of considering a mineral production project involving this substance. FINAL CONCLUSIONS ON THE GEOLOGY, it is concluded that: The study area is located in a region with limited geological variety, predominantly featuring metamorphosed metasediments of varying degrees, resulting in formations such as limestones, metarenites, and associated quartz veins; The eastern sector of the ANM process visited is the one that provides the most geological information regarding its mineral potential and possible product types. ON THE CURRENT MINERAL POTENTIAL, it is noted that: Based on reconnaissance data, only two types of substances have been identified as having potential economic value, depending on laboratory results: high-purity quartz and limestone; Despite its promise, the actual mineral potential of the visited ANM process will be determined after further research activities and the presentation of results, at which point the best strategy for continuation, production, or discontinuation of the projects will be defined. ON STRATEGIC POINTS, it is important to highlight that: The logistics of transporting potential limestone extraction should be carefully planned due to the distance from the asphalt and the quality of the existing access routes; There is a large quarry in operation near the area, managed by the company "Calcário BR-101," which operates approximately 2 km from the asphalt with productive and high-volume mining fronts. This could impact market competition for any potential product to be mined in the visited area; It is essential that, before proceeding with any research activities in any part of the areas, a formal agreement between the Titleholder and Surface Owners be established to clarify the intentions regarding mineral research and extraction in the region, considering the promising initial contact with the field team; The area has access to nearby energy sources, while water will likely need to be sourced locally, probably through tubular wells. GALLERY Contexto Geológico e Potencial Mineral Metodologia de Trabalho Geologia Local Potencial Mineral Prévio Considerações Gerais Conclusões Finais Galeria
- Interested in Project | Brasil Mineração
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- Magnesium | Brasil Mineração
Discover BRM’s Foundry Quartz: high-quality quartz with low impurities and excellent thermal resistance, ideal for metal casting, core production, and high-performance foundry applications. Magnesium Purity that Powers Industrial Innovation We provide versatile magnesium solutions tailored for demanding industries around the world. Our Magnesium Lumps and Oxides are sourced and processed to meet the most rigorous standards of purity, particle size, and performance. Whether used in metal production, refractory processes, or chemical applications, our products ensure optimal results and consistent supply. Available in both lump and powder forms, we adapt to your specifications and operational needs with flexibility and scale. High-Quality Magnesium Lumps & Oxides for Industrial Applications Magnesium plays a critical role in a range of sectors due to its reactivity, light weight, and versatility. Our Magnesium Lumps, with high MgO content above 90%, are ideal for the production of alloys, including aluminum-magnesium blends used in aerospace and automotive applications. Their high melting point and energy-efficient reactivity make them valuable for reducing agents in metallurgy and desulfurization processes in steelmaking. Our Magnesium Oxide (MgO) is finely processed for use in agriculture, chemical manufacturing, and the production of refractory bricks and linings. Its high thermal resistance and alkaline properties contribute to performance in environments with extreme temperatures or acidity. With over 15,000 tons available, we support projects of any scale — from continuous supply chains to urgent spot requirements. We offer both standard packaging and custom solutions upon request. Rely on our magnesium portfolio to bring durability, efficiency, and superior quality to your operations. Inquire Now Click below and ask us about this product. Contact Us
- Products | Brasil Mineração
Explore BRM’s portfolio of industrial minerals, chemicals, and raw materials for global industries. From high-purity silica sand and barite to calcium carbonate and beryllium, we deliver consistent quality, reliable supply, and export expertise for your business. Our Products Brm Trading offers a diverse range of products that we either produce or resell. Our portfolio includes, but is not limited to, High Grade Silica Quartz, Foundry Quartz, High Grade Silica Sand, Calcium Carbonate Filler, Fluorspar, Granites, Quartzites, Marbles, and Bauxite in various forms such as Sintered, Calcined, Ground, or Raw. Silica Sand High Grade Read More High Purity Silica Sand – Premium "in natura" SiO2 from Brazil. High Grade Quartz Read More Ultra-Pure Quartz (99.9% Purity) for High-Precision Applications Foundry Quartz Read More Premium Foundry Quartz for Metal Casting and Industrial Applications Magnesium Read More High-Quality Magnesium Lumps & Oxides for Industrial Applications Mica Read More Discover high-quality mica in powder, flake, and sheet forms, ideal for industrial, artistic, and commercial applications. Beryllium Read More High-Grade Beryllium Ore (>10%) from Aquamarine & Emeralds for Industrial Applications Calcium Carbonate Read More Calcium Carbonate – High-purity, versatile powder for industrial, commercial, and agricultural use. Fluorspar Read More Fluorspar (CaF2 91.0% – 95.0%): High-purity fluorspar in 60 mesh. Barite Read More Premium Barite Ore (4.1, 4.2) & Barite Powder for Industrial Excellence Rock Face Beige Bahia Read More Textured Limestone from Bahia for premium decorative and exterior cladding. Didin't Find a Product? Read More We're here to help!

