 | | Journal (article/letter/editorial) | | bauxite ore is composed of gibbsite in addition to goethite, hematite, and kaolinite. In general, the ore...Paragominas deposit, and two years later, Alcoa began to mine the Juruti deposit. The Brazilian Company for Aluminum...(3.5”). Abbreviations: Gbs = gibbisite, Gth = goethite, Hem = hematite, Kln = kaolinite. 1282 SCIENTIFIC...were (in order of abundance) gibbsite, hematite, goethite, kaolinite, rutile, muscovite, anatase, boehmite...Quantifications on the Same Sample Phase Gibbsite Hematite Goethite Kaolinite Amorphous Muscovite Anatase Boehmite |  | Ferreira, Amanda D., Queiroz, Hermano M., Kaneagae, Maira P., Nóbrega, Gabriel N., Otero, Xosé L., Bernardino, Ângelo F., Ferreira, Tiago O. (2021) Gypsum Amendment Induced Rapid Pyritization in Fe-Rich Mine Tailings from Doce River Estuary after the Fundão Dam Collapse. Minerals, 11 (2) 201 doi:10.3390/min11020201 | Journal (article/letter/editorial) | | Amendment Induced Rapid Pyritization in Fe-Rich Mine Tailings from Doce River Estuary after the Fundão...Compostela, Campus Sur, 15782 Santiago de Compostela, Spain; xl.otero@usc.es Grupo de Ecologia Bentônica, Departamento...Correspondence: toferreira@usp.br min11020201 Abstract: Mine tailings containing trace metals arrived at the...the Doce River estuary, after the world’s largest mine tailings disaster (the Mariana disaster) dumped approximately...Amendment Induced Rapid Pyritization in Fe-Rich Mine Tailings from Doce River Estuary after the Fundão |  | | Journal (article/letter/editorial) | | other hand, the association between phosphorus and goethite was clearly observed in the other samples. Keywords:...1999). For synthetic samples, it was found that goethite presents a much higher sorption capacity than...of the larger surface area and porosity of the goethite particles. The best approach to identify the association...diffraction difficult. Hematite (α-Fe2O3) and goethite (α-FeOOH), as well as kaolinite and quartz, are...Results for synthetic samples of hematite and goethite showed that phosphorus, probably in the * E-mail: |  | Varajão, C. A. C., Suckal, V., Vilela, R. A., de Melo, R. J., Bruand, A., Ramanaidou, E. R., Gilkes, R. J., Lagoeiro, L. E., da Costa, T. A. V. (2003) Bulk density as method of evaluating reducibility of hard hematite ore in direct reduction process. Mineral Processing and Extractive Metallurgy, 112 (1). 52-53 doi:10.1179/037195503225011457 | Journal (article/letter/editorial) | | (10–30 mm). Quartz, maghemite, kenomagnetite and goethite are minor components. Primary micropores (Å to...research programme supported by FAPEMIG (Fundação de Amparo à Pesquisa do Estado de Minas Gerais). The authors...hematite, secondary euhedral martite11,12 and goethite. Micropores associated with euhedral martite vary...features due to dissolution or associated with goethite. They are interconnected, very irregular and range... A. DECARREAU and A. J. MELFI : ‘Hematite and goethite from duricrusts developed by lateritic chemical |  | Carvalho-e-Silva, Maria Luiza, Ramos, Aline Yvette, Tolentino, Helio Cesar Nogueira, Enzweiler, Jacinta, Netto, Silvania Maria, do Carmo Martins Alves, Maria (2003) Incorporation of Ni into natural goethite: An investigation by X-ray absorption spectroscopy. American Mineralogist, 88 (5) 876-882 doi:10.2138/am-2003-5-617 | Journal (article/letter/editorial) | | 876–882, 2003 Incorporation of Ni into natural goethite: An investigation by X-ray absorption spectroscopy...Brazil 3 LMCP UMR7590 Paris, France ABSTRACT Goethite (a-FeOOH) is abundant at the Earth’s surface and...foreign elements are incorporated into natural goethite has implications for environmental and mining...environment around Ni in natural Ni-containing goethite (1.8–4.1 mol% Ni) from Vermelho lateritic deposit...structure. INTRODUCTION The special importance of goethite (a-FeOOH) in geochemistry results from the combination |  | Faulstich, Fabiano R.L., Schnellrath, Jurgen, De Oliveira, Luiz F.C., Scholz, Ricardo (2014) Rockbridgeite inclusion in rock crystal from Galileia region, Minas Gerais, Brazil. European Journal of Mineralogy, 25 (5) 817-823 doi:10.1127/0935-1221/2013/0025-2307 | Journal (article/letter/editorial) | | tentatively associate them with iron oxy-hydroxides (goethite). The characterization of phosphate minerals is...Scholz offers thanks to FAPEMIG – Fundação de Amparo à Pesquisa do Estado de Minas Gerais, (grant No...batholiths in the Navasfrias Sn-W District, Salamanca, Spain. Mineral. Mag., 76, 1–24. Lobato, L.M. & Pedrosa-Soares...association from Pinilla de Fermoselle pegmatite, Zamora, Spain: occurrence of kryzhanovskite and natrodufrénite |  | | Report (chapter) | | Middle Triassic in the Iberian Ranges (Central Spain) D . R E Y 1, P. T U R N E R 2 & A . R A M O S 3...Medio Ambiente, Universidade de Vigo, 23000 Vigo, Spain 2 School o f Earth Sciences, The University o f...Estratigrafia, Universidad Complutense, 28040 Madrid, Spain Abstract: The study of the structure and origin...sandstone Formations (Middle Triassic, Central Spain) reveals the presence of several components of magnetization...CRM also contributes to the primary remanence. Goethite and several textural phases of authigenic hematite |  | | Book | | produced specimens from such places as the La Fe Mine in the state of Chiapas and Santa Rosalia in the...Spaniards in 1517 , the needs for minerals increased. Spain needed the gold and silver to finance its territorial...the Santa Eulalia area is uncertain. Records in Spain cite that silver was discovered in 1591 in the mountains...surface in large caves. Some of these caves and mine stopes were so large that it was said that the cathedral...of the political unrest in southcentral Mexico. Spain withdrew most of its rnilitary forces from Chihuahua |  | | Journal (article/letter/editorial) | | in the recovery of rare earth elements from acid mine drainage through pH neutralization M.L.B. Moraes...in the recovery of rare earth elements from acid mine drainage through pH neutralization, Applied Geochemistry...the recovery of rare earth 2 elements from acid mine drainage through pH 3 neutralization 4 MORAES...Salamanca, Plaza de los Caídos s/n, Salamanca, 37008, Spain, 12 murciego@usal.es 13 3 Instituto de Recursos...14 Cordel de merinas, 40-52, Salamanca, 37008, Spain, 15 esther.alvarez@irnasa.csic.es 16 17 Abstract: |  | | Journal (article/letter/editorial) | | released after heating several synthetic samples of goethite, hematite and natural iron ores at 105, 400, 600...worldwide and hence ores containing larger amounts of goethite are being mined. The green pellets are roasted...and Mean coherence lengths (Å) for the synthetic goethite and hematite samples Sample T (°C) Time (days)...7 7 10 120 600 250 270 380 530 Goethite Goethite Goethite Goethite Hematite Hematite HU 90 580 Hematite...specularite. Goethite is the dominant phase (~60 wt%) in samples CG1, CG2 and NO5. Four goethite samples were |  | | Journal (article/letter/editorial) | | extraction from two waste rock samples from a phosphate mine. The role of different mineralogical assemblages...dissolution. The corresponding sulfuric acid consumed by goethite (α-FeOOH) from 25 ◦ C to 160 ◦ C acid baking is...extraction due to the reaction of minerals, such as goethite (α-FeOOH) (2) and magnetite (Fe3 O4 ) (4) with...generic lanthanum phosphate (i.e., monazite), goethite, fluorapatite, and magnetite with concentrated...samples originated from an igneous phosphate operating mine in Triângulo Mineiro, Minas Gerais/Brazil, which | | | Book | | produced specimens from such places as the La Fé Mine in the state of Chiapas and Santa Rosalia in the...Spaniards in 1517, the needs for minerals increased. Spain needed the gold and silver to finance its territorial...the Santa Eulalia area is uncertain. Records in Spain cite that silver was discovered in 1591 in the mountains...surface in large caves. Some of these caves and mine stopes were so large that it was said that the cathedral...of the political unrest in southcentral Mexico, Spain withdrew most of its military forces from Chihuahua |  | | Journal (article/letter/editorial) | | Introduction stratigraphic column,Table 1. At the Caue Mine, a concordantultrabasicinnorth of Rio de Janeiro...control for the percolationof of C ore body,Conceiq5o Mine, meteoricwaters,which is believedto be responsible...P. BARBOUR W 1.240 C0-55 CROSSSECTIONOF CAUE MINE CO-19 CO-20 E Fxd.2. Crosssection,Canemine,showingiron...madeto show, in normal sequence:number of the sample, mine (Ca = Caue; DC = Dais Corregos;Co -- Concek;•o;...symbolfor the mine (Ca, for instance) is followed by two numbers, the numbers indicate the mine bench. Ca-1115 |  | Mendes, Mônica, Lobato, Lydia M., Kunzmann, Marcus, Halverson, Galen P., Rosière, Carlos A. (2017) Iron isotope and REE+Y composition of the Cauê banded iron formation and related iron ores of the Quadrilátero Ferrífero, Brazil. Mineralium Deposita, 52 (2) 159-180 doi:10.1007/s00126-016-0649-9 | Journal (article/letter/editorial) | | quartz itabirites of the now exhausted Águas Claras mine. Selmi et al. (2009) analyzed quartz itabirites...magnetite, partially transformed to martite and minor goethite. h Folded martite band, characterized by high...on the presentday land surface, the ore may be goethite rich and partially silicified to chalcedony (Rosière...in the Moeda syncline (Fig. 1). In the Pau Branco mine, quartz itabirite is the main lithotype, intercalated...association with quartz veins. The Várzea do Lopes mine is located in the western limb of the Moeda Syncline |  | Souza, Rodrigo F. M., Tavares, Mariana A. A., Cruz, Luiz E. C., Oliveira, Víctor A. A., Santos, Iranildes D., Moura, Francisco J., Brocchi, Eduardo A. (2022) On the Cobalt Content Upgrade in Nickeliferous Laterites Using Iron (III) Sulfate: A Study Based on Thermodynamics Simulations. Minerals, 12 (9) 1156 doi:10.3390/min12091156 | Journal (article/letter/editorial) | | typically in warm and rainy regions [18,19], with goethite as the major nickel bearer [20]. Limonite and...%). Goethite also appeared in large quantities (32.7 wt.%), concate laterite (19.5 wt.%). Goethite also...Mineral Magnesiochromite Magnesiochromite Goethite Goethite Halloysite Halloysite Doyleite Doyleite Birnessite...thethermal thermaldecomposition decompositionof of goethite goethite [17]. [17]. For For 30 30 wt.% water from...thermal decomposition decompositionof ofgoethite. goethite. The The total mass loss would be 8 wt.%, which |  | | Book | | Eulalia District....... El Potosi Mine............. San Antonio Mine....... Cusihuiriachic District................................. Minerals of Ojuela Mine .... . Velardena District.........................Guanajuato District ..................... El Sanlin Mine......................... San Miguel de Allende ...assistant superintendent, both of Fresnillo’s Naica mine, helped with data and review. Dr. Edwin Roedder...made possible our visit to the Esperanza fluorite mine. Engineer Macario Munoz, Comision de Fomento Minero |  | Teixeira, N.L., Caxito, F.A., Rosière, C.A., Pecoits, E., Vieira, L., Frei, R., Sial, A.N., Poitrasson, F. (2017) Trace elements and isotope geochemistry (C, O, Fe, Cr) of the Cauê iron formation, Quadrilátero Ferrífero, Brazil: Evidence for widespread microbial dissimilatory iron reduction at the Archean/Paleoproterozoic transition. Precambrian Research, 298. 39-55 doi:10.1016/j.precamres.2017.05.009 | Journal (article/letter/editorial) | | at 518.5 ± 9 Ma (U-Pb SHRIMP) at the Cuiabá gold mine, 158 Rio das Velhas greenstone belt (Martins et...preserved 605 meters deep drillhole core of the Alegria mine region 164 (FPQ-26-1; Figure 1) was made available...Locally, amphiboles are partially replaced by goethite. Magnetite 256 occurs as very fine subhedral...very fine grained magnetite, locally replaced by goethite (Fig. 4D). Fibrous 284 and capilar colourless...venulations and local alteration of magnetite to 308 goethite (Fig. 4D). 309 Thus, despite the fact that the |  | | Journal (article/letter/editorial) | | solution. Saturation is reached successively for goethite (FeOOH), gibbsite, kaolinite, Fe-smectites, Fe-Al...the rhizosphere. FeIII is precipitated mainly as goethite and lepidocrocite, and FeII mobility may be regulated... Al-hydroxides (gibbsite), Fe-oxi-hydroxides (goethite) and Fe-sesquioxydes (hematite). Podzols are highly...secondary minerals (kaolinite, gibbsite, hematite, goethite). This weathering cover thus configures an outstanding...secondary minerals (e.g. kaolinite, gibbsite, goethite, hematite) for which the soil solution is likely |  | Benites, Mariana, Hein, James R., Mizell, Kira, Blackburn, Terrence, Jovane, Luigi (2020) Genesis and Evolution of Ferromanganese Crusts from the Summit of Rio Grande Rise, Southwest Atlantic Ocean. Minerals, 10 (4) 349 doi:10.3390/min10040349 | Journal (article/letter/editorial) | | many Fe–Mn crust samples is composed of major goethite, minor to major calcite, and minor to moderate...Vernadite 10 Å, pyrolusite Goethite Vernadite, 10 Å, CFA 10 Å, Vernadite, CFA Goethite Vernadite, 10 Å Vernadite...CFA, calcite CFA, calcite 10 Å, Vernadite Goethite Goethite Calcite, Mg-calcite Vernadite, 10 Å, calcite...L0-20 Bulk Vernadite Goethite CFA CFA Vernadite, 10 Å Vernadite, 10 Å, CFA Goethite Calcite Calcite 10... moderately phosphatized Calcite, pyrolusite Goethite, Vernadite Calcite Quartz Calcite Minerals 2020 |  | De Oliveira, Ester Figueiredo, Castañeda, Cristiane, Eeckhout, Sigrid Griet, Gilmar, Messias Menezes, Kwitko, Rogério Ribeiro, De Grave, Eddy, Botelho, Nilson Francisquini (2002) Infrared and Mössbauer study of Brazilian tourmalines from different geological environments. American Mineralogist, 87 (8) 1154-1163 doi:10.2138/am-2002-8-914 | Journal (article/letter/editorial) | | velocity TABLE 1. Sample reformation Sample Location Mine Associations Magmatic environment Qtz, Spd, Lpd...arsenopyrite; Py = pyrite; Po = pyrrotite; Gt = goethite; Mag = magnetite; Hem = hematite; Dol = dolomite;...hydrothermal processes. The Passagem de Mariana gold mine is located less than 10 km to the southeast, between...Conselho Nacional de Pesquisa (CNPq) and Fundação de Amparo à pesquisa de Minas Gerais (FAPEMIG), and to the |  | | Journal (article/letter/editorial) | | Superior) and FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro) for the... 1960. Flotation characteristics of hematite, goethite and activated quartz with 18-carbon aliphatic |  | | Journal (issue) | | Holland, France, Belgium, Switzerland, Italy, Spain, the Canary Islands, Lebanon, Israel, Dubai, Kenya...sapphires from Brazil come from the well-known emerald mine at Santa Terezinha de Goias, are bluish-grey with...but all cuttable material comes from the Wessels Mine, 23 north-west of Hotazel in Cape Province, South...1986. Panna mine revisited. Indiaqua, 44, 2, 23-7, 21 figs in colour. The Panna diamond mine in India is... Alluvial operations ceased, but the kimberlite mine and plant started up in December and output should |  | de Oliveira, Grace Juliana Gonçalves, Vasconcelos, Marcos Alberto Rodrigues, Crósta, Alvaro Penteado, Reimold, Wolf Uwe, Góes, Ana Maria, Kowitz, Astrid (2014) Shatter cones and planar deformation features confirm Santa Marta in Piauí State, Brazil, as an impact structure. Meteoritics & Planetary Science, 49 (10) 1915-1928 doi:10.1111/maps.12368 | Journal (article/letter/editorial) | | reddish and composed of various FeOOH phases, with goethite being dominant. The clast modification has a bimodal...Acknowledgments—The Brazilian authors acknowledge Fundacß~ao de Amparo a Pesquisa no Estado de S~ ao Paulo (FAPESP) for |  | | Journal (volume) | | Acknowledgements We acknowledge FAPESP (Fundaç ã o de Amparo à Pesquisa do Estado de Sã o Paulo) for financial...Oktyabrsky (Komsomolsky Mine), and in the southern part of Norilsk1 (Medvezhy Ruchei Mine). The veins of 0...flank of the Taimyr orebearing pluton (Komsomolsky Mine). In this area, there were steeply dipping carbonate...Nickelskutterudite, and Skutterudite from the Norilsk Ore Field Spain. Can. Mineral. 42, 1221–1240. Genkin, A.D., Filimonova...analyses of minerals in the kotoitite (sample VR10) Mine Perts.11 Perts.6 ral Perts.5 Koto3 Koto. id Ludw |  | | Report (issue) | | Paraguay Peru petroleum plural Puerto Rico seismology Spain statistics Dominican Republic surveying southwest...A number of local measures of area are used in Spain and Latin America: almud (Venezuela) area (Venezuela)...estadal (Nicaragua) esladal (Spain) fanega (Mexico) fanegada (Peru) fanegada (Spain) fanegada (Venezuela) labor...(Ecuador) suerte (Nicaragua) suerte (Uruguay) tahulla (Spain) tarea (Cuba) tarea (El Salvador) tarea (Santo Domingo)...Cuzco) topo (Peru, Puna) yugada (Peru) yugada (Spain) 1 hectares 0.699 hectares (8 so/ores) 0.70258 |
|
