 | | Other Paper | | hematite and goethite and Tochilin (1951) characterized turgite as a mixture of goethite, ‘hydrogoethite’...with the surface of hard, botryoidal hematite or goethite. In the case of a ‘rainbow hematite’ currently...P ratios (6.9 to 7.1) were observed with the Pico Mine sample (GRR 2377). The primary exception was sample...also found. The crystals on the surface of the Pico Mine sample (GRR2377) displayed the oriented crystals...of a green colored region of hematite from the Pico Mine (GRR 2377). Anion exchange tests The appearances |  | Shuster, David L., Farley, Kenneth A., Vasconcelos, Paulo M., Balco, Greg, Monteiro, Hevelyn S., Waltenberg, Kathryn, Stone, John O. (2012) Cosmogenic 3He in hematite and goethite from Brazilian “canga” duricrust demonstrates the extreme stability of these surfaces. Earth and Planetary Science Letters, 329. 41-50 doi:10.1016/j.epsl.2012.02.017 | Journal (article/letter/editorial) | | com/locate/epsl Cosmogenic 3He in hematite and goethite from Brazilian “canga” duricrust demonstrates...Berkeley, CA 94720, USA Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, USA Division of Geological...California Institute of Technology, Pasadena, CA 91125, USA d Department of Earth Sciences, University of Queensland...Sciences, University of Washington, Seattle, WA 98195, USA b c a r t i c l e i n f o Article history: Received...Helium isotopes were measured in hematite and goethite samples from several lateritiric duricrusts (canga) |  | | Journal (article/letter/editorial) | | Geology and geochemistry of the Águas Claras and Pico Iron Mines, Quadrilátero Ferrı́fero, Minas Gerais...Springer-Verlag 2003 Abstract The Águas Claras and Pico Mines are two world-class iron-ore mines hosted...very high Fe contents (an average of 68.2% Fe). The Pico orebody is a continuous 3,000-m-long body of a...protore of the soft high- and low-grade ores at the Pico Mine. The soft high-grade ores, together with the...mineralogy is the same as that of the Águas Claras Mine, but in different proportions. Gangue minerals are |  | Díaz-Acha, Yael, Campeny, Marc, Casas, Lluís, Di Febo, Roberta, Ibañez-Insa, Jordi, Jawhari, Tariq, Bosch, Josep, Borrell, Ferran, Jorge-Villar, Susana Esther, Greneche, Jean-Marc, Tauler, Esperança, Melgarejo, Joan Carles (2022) Colours of Gemmy Phosphates from the Gavà Neolithic Mines (Catalonia, Spain): Origin and Archaeological Significance. Minerals, 12 (3) 368 doi:10.3390/min12030368 | Journal (article/letter/editorial) | | cryptocrystalline mixtures with jarosite, phosphosiderite, or goethite, variscite tends to acquire a greenish brown to...located at the NE of the complex; mine 16 to the SE; and the largest mine structure, formed by mines 3, 5...30 m and reached up to 15 m in depth [20,45,46]. Mine 16, which reached a depth of 9 m, has a semi-vertical...variscite beads. The most remarkable finding in this mine was an anthropomorphic-figure vessel known as the...reliefs known as the Les Ferreres Range (200 m high). Mine 85 was discovered and excavated during the year |  | | Journal (article/letter/editorial) | | Abstract Weathering profiles overlying the Sapecado, Pico and Andaime iron ore deposits, Quadrilátero Ferrífero...depths ranging from 5 to 150 m at the Sapecado, Pico and Andaime deposits reveal ages ranging from ca...profile from the Serra da Moeda (MO) to the Sapecado mine (SAP) at the Serra do Itabirito. iron-formations...geomorphology Three adjacent iron mines (Sapecado, Pico, and Andaime) (Figs. 1 and 2) provide access to...iron ore, represents the southern extension of the Pico orebody. It is composed of lenses of soft and hard |  | | Journal (article/letter/editorial) | | University] at 01:02 21 December 2014 79 Mine, Gila County, Arizona E veryone likes blue minerals....including the Harborside mine at Brooksville, Hancock County, and the Lubec lead mine and prospects at Pembroke...Washington County. It has also been found at the old lead mines at Middletown, Middlesex County, Connecticut;...Easthampton, Hampshire County, Massachusetts; the old Gorham (Mascot mine), Coos County, New Hampshire; as...iron mine at Andover, and as an accessory mineral at Franklin and Sterling Hill, Sussex County, New Jersey; |  | | Journal (article/letter/editorial) | | Sphalerite and calcite, 5 cm across, Denton mine, Hardin County. Ross Lillie specimen. +!.+!+%% 34!2+ ...chalcopyrite, and sphalerite, 12.7 cm high, Hardin County. Marv Rausch specimen. 3(%,"9 -!#/50). /5 ....to the mid-1970s were documented with the exact mine or in many cases even the correct subdistrict. In...sprays of millerite associated with calcite. The coal mine dumps and waste piles scattered throughout much...Fluorite and barite, 6 cm high, Minerva No. 1 mine, Hardin County. Ross Lillie specimen. Figure 5 (above right) |  | | Journal (article/letter/editorial) | | formation with typically 25 to 45 wt-%Fe; martite–goethite ore formed by supergene processes, with abundant...Hamersley province of Western Australia, martite– goethite ores are largely developed in the Marra Mamba...formation with typically 25 to 45 wt-%Fe (ii) martite–goethite ore formed by supergene processes, with abundant...formations with 25 to 45 wt-%Fe are still mined in the USA, Canada and especially in China, the latter where...saleable concentrate. Approximately 700 Mt of run-of-mine ore and 200 Mt of magnetite concentrates were produced |  | | Journal (article/letter/editorial) | | genesis mineralogy also identifies the presence of goethite but does not classify this mineral in terms of...chemical composition such as aluminan goethite and siliceous goethite. For mineral processing purposes it...hematite II and III and goethite as its main iron bearing mineral phases, the goethite is aluminan or siliceous...(crystallisation water, such as that present in goethite) can be correlated to the decrepitation behaviour...important iron bearing phase for all samples and goethite, in different forms, occurs as a secondary iron |  | | Journal (article/letter/editorial) | | in martite (hematite replacing magnetite) and goethite. These processes are most effective in places...Oberlin College 52 W Lorain Street, Oberlin, OH 44074, USA E-mail: bruce.simonson@oberlin.edu E LEMENTS , V...These deposits are “shoestrings” of pisolitic goethite that snake along sinuous mesas. They probably...Whaleback mine in Western Australia in 2007. The pit is 5 km long and the largest single-pit iron mine in the...SCOTT HASSLER 119 FIGURE 1 A PR IL 2011 Pico mine with working equipment in the Quadrilátero Ferrífero |  | | Journal (article/letter/editorial) | | sufficiently different to permit The thermal curves of goethite;d in natural mixtures. The common occurminerals...The members of the group have included turgite, goethite, lepidocrocite, hydrogoethite, limonite, xanthosiderite...been substantiatedby other investigators. Only goethite (HFeO) and lepidocrocite FeO(OH) have been ac_...Thermal curves of individual specimens labelled goethite or lepidocrocite have been published by Grim and...colloidally transported, are later precipitated as goethite or lepidocrocite. Aluminum is usually transported |  | Spier, Carlos Alberto, de Oliveira, Sonia Maria Barros, Rosière, Carlos Alberto, Ardisson, José Domingos (2008) Mineralogy and trace-element geochemistry of the high-grade iron ores of the Águas Claras Mine and comparison with the Capão Xavier and Tamanduá iron ore deposits, Quadrilátero Ferrífero, Brazil. Mineralium Deposita, 43 (2) 229-254 doi:10.1007/s00126-007-0157-z | Journal (article/letter/editorial) | | of the high-grade iron ores of the Águas Claras Mine and comparison with the Capão Xavier and Tamanduá... Unlike other mines in the QF, the Águas Claras Mine contained mainly high-grade ores hosted within dolomitic...distinct types of high-grade ore occurred at the mine: soft and hard. The soft ore was the Editorial...elements. The high-grade ores at the Águas Claras Mine have at least a dual origin, involving hypogene...an important role. The occurrence in the Tamanduá Mine of a large, soft, high-grade orebody formed from |  | | Journal (article/letter/editorial) | | theory, considering that microscopic studies of Pico do Itabirito hard ore ‘do not show any evidence...Abóboras, Fernandinho, Galinheiro, Mina do Pico e Sapecado (MBR mine properties). Apart from the initially...chevron structures, are more characteristic at the Pico do Itatiaiuçu, Três Picos, Serra Azul, Farofas,...lenticular, almond-shaped body, such as found at Mina do Pico do Itabirito, Jangada, 3Fe3O4 + 8SiO2 + H2O = Fe2O3...flanked by the foliated and laminated itabirite at Pico do Itatiaiuçu. The compact hematite of the breccia |  | | Journal (issue) | | GROUP NO. 1-MINERALS OF ECONOMIC INTEREST...... Goethite Spodurrene Tele 81ux111 Hematite '8entonlle Beryl...Jasper .... $25 .25 MINIMUM ORDER S18 postpaid in USA Subscribe to our CATALOG of cabochons. beads. slabs...this ~ of work, but I sure wouldn ' t be without mine. The Basics ofEngraving When the necessary tools...Institution; the Los Angeles County Museum of Natural History; the San Bernardino County Museum; the University...Recently Renovated Gem and Mineral Hall of the L.A. County Museum and Achievements of the Gem and Mineral |  | | Journal (article/letter/editorial) | | iron ore from banded iron-formation in the Capanema mine (Minas Gerais, Brazil) E. R. Ramanaidou a a CSIRO...iron ore from banded iron-formation in the Capanema mine (Minas Gerais, Brazil), Australian Journal of Earth...iron ore from banded iron-formation in the Capanema mine (Minas Gerais, Brazil) E. R. RAMANAIDOU Downloaded...large deposits of iron ore. At the Capanema iron-ore mine in the Quadrilatero Ferrifero in Minas Gerais state...lateritic weathering. Eight different types of goethite (I–VIII) and three types of hematite (I–III) were |  | Ribeiro, Diniz, Moraes, Israel, Kwitko-Ribeiro, Rogerio, Braga, Deivid, Spier, Carlos, Santos, Pedro (2020) From Fresh Itabirites and Carbonates to Weathered Iron Ore: Mineral Composition, Density and Porosity of Different Fresh and Altered Rocks from the Quadrilátero Ferrífero, Brazil. Minerals, 11 (1) 29 doi:10.3390/min11010029 | Journal (article/letter/editorial) | | residual enrichment or recrystallization of hematite, goethite, quartz, manganese oxides, and kaolinite. A calculation...Jangada (CCE/MMI), Pico/Sapecado Galinheiro (GAL), Abóborasdo (ABO), (CCE/MMI), Pico/Sapecado (PIC/SAP)...Carb. = carbonates (mostly dolomite), Goet. = goethite, Fe ox. = iron oxides (mostly hematite). Most...plus quartz and goethite (Table 1). The lack of carbonates and the presence of goethite in this group is...friable ores such as “hematitite”, quartz itabirite, goethite itabirite, and manganiferous itabirite [8]. Guild |  | | Journal (article/letter/editorial) | | of pseudomorphing of the BIF gangue at depth by goethite. The enrichment as a whole is an absolute accumulation...solution and precipitation by secondary hematite and goethite. The final product of lateritisation of BIF and...and botryoidal, or nodular aluminous/siliceous goethite and hematite, variously known as ferricrete, duricrust...between these ores and the supergene mimetic martite-goethite ores is that they grow downward, with the total...repeated solution and deposition of aluminous goethite. The present ridge topography of iron-ore deposits |  | Monteiro, Hevelyn S., Vasconcelos, Paulo M., Farley, Kenneth A., Spier, Carlos A., Mello, Claudio L. (2014) (U–Th)/He geochronology of goethite and the origin and evolution of cangas. Geochimica et Cosmochimica Acta, 131. 267-289 doi:10.1016/j.gca.2014.01.036 | Journal (article/letter/editorial) | | elsevier.com/locate/gca (U–Th)/He geochronology of goethite and the origin and evolution of cangas Hevelyn...California Institute of Technology, Pasadena, CA 91125, USA c Latin Resources Limited, Peru d Instituto de Geosciências...Abstract (U–Th)/He geochronology of 147 grains of goethite cements extracted from ferruginous duricrusts...dissolution–reprecipitation in the recent past. Within cangas, goethite cements are younger near the surface and become...biogenic activity. (U–Th)/He geochronology of 14 goethite grains from saprolites in the same profiles yield |  | | Journal (article/letter/editorial) | | Tamandua, 4 Serra do Gama, 5 C6rrego do Feijfio, 6 Pico de Itabirito, 7 Ffibrica, 8 Jogo Pereira, 10 Germano...road cut near Ouro Pr~to;--15 outcrop Espiggo do Pico near Rio Piracicaba Minor and Trace-element Data...showing the formation of martite, kenomagnetite or goethite, were avoided, though 16 concentrates affected...impurities such as manganese oxides, phosphates, goethite or silicates remained, but sub-microscopic inclusions...product in rich iron ores from the Cdrrego do Feijgo mine, Minas Gerais, Brazil. Contrib Mineral Petrol 87:418-419 |  | Britvin, Sergey N., Krivovichev, Sergey V., Obolonskaya, Edita V., Vlasenko, Natalia S., Bocharov, Vladimir N., Bryukhanova, Vera V. (2020) Xenophyllite, Na4Fe7(PO4)6, an Exotic Meteoritic Phosphate: New Mineral Description, Na-ions Mobility and Electrochemical Implications. Minerals, 10 (4) 300 doi:10.3390/min10040300 | Journal (article/letter/editorial) | | spectrometer (AzTec Energy Group Inc., Brentwood, NY, USA) attached to a Hitachi S-3400N scanning electron...pentlandite; Schr, schreibersite; Crt, chromite; Gth, goethite (weathering product). Photomicrographs by Sergey...~0.5 mm sarcopside grain cross-cut by secondary goethite and dissected with the green-grey xenophyllite...Abbreviations: Xn, xenophyllite; Src, sarcopside; Gth, goethite. Photographs by Sergey Britvin. Minerals 2020...Meteorites; University of California Press: Berkeley, CA, USA, 1975; Volume 2, pp. 279–281. The Augustinovka meteorite |  | | Report (issue) | | ---------------37. Geologic map of the Pitangui mine area__-____-________-___----_-__--_----_---_-___-_---------38...Schematic diagrams illustrating relationship of goethite-filled faults to manganese ore beds, Conta Hist6ria___...Hist6ria mine. _________________________________________________________ 12. Limonite-goethite in faults..._ 16. Manganese ore from areas east of the main mine at Conta Hist6ria__.__________________________ 17...oxides. Total production from the one operating mine in the district has been about 25,000 tons. Proved |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University...Pennsylvania 15026. The twelve color photos show groups of mine lamps and other mining antiques from the extraordinary...in the Urals, Soviet Union; the Morefield mine, Amelia County, Virginia; and the Anjanabonoina pegmatite...resulted in a partial closing of the mine in 1984. The Socoto mine lies north-northeast of the Campo Formoso...though not of gem quality. Phenakite from the Socoto mine occurs as milky to translucent crystals up to 10 |  | | Journal (article/letter/editorial) | | soft martite ores are in distinct contrast to the goethite-martite brown ores elsewherealongthe Nimba Range...hydrated goethite hematite ore, locally termed brown ores, from the sameridge. The Nimba mine, with a...located in the northeasternmostcorner of Nimba County, Liberia, 360 km east-northeast of Monrovia and...tunneling and continuous,daily, geologicmappingof mine benches since start of production. During a typical...octahedra(martitization dral hematite,marrite, specularhematite,goethite, lamellae).Martitizationlamellaein blueore and |  | | Journal (article/letter/editorial) | | Adams, Hood, Rainier, and Shasta (Cascade Range, USA), was investigated using field observations, petrography...Mount Rainier. 2.1. Citlaltépetl Citlaltépetl (Pico de Orizaba, 5675 m), the easternmost major volcano...pyrite during exposure to air adds jarosite and goethite to this assemblage. (2) The assemblage jarosite+alunite+silica...smectite (nontronite) in samples containing minor goethite conforms to the phases predicted by the low-temperature...kaolinite, Fe-oxide minerals such as hematite and goethite, and jarosite and soluble hydroxysulfates. Supergene |  | | Journal (volume) | | the CSIRO in roles including science adviser for mine processing. He previously advised companies such...senior exploration geologist at Sishen iron ore mine for the same company. For the past 8 years he has...focusing on structural geology and iron ore from the Pico de Itabira deposit at the Quadrilátero Ferrífero...he was employed as an exploration, project, and mine geologist in the Amapá State (Amazon region), working...2003, Carlos worked as a mine and resource geologist at the Águas Claras and Pico iron mines for Minerações |
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