 | | Journal (article/letter/editorial) | | com/loi/tigr20 Geology and Mineral Resources of Brazil: A Review a a Inacio De Medeiros Delgado , Augusto...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil b US. Geological Survey, Denver, CO, 80225 Version...Thorman (1994): Geology and Mineral Resources of Brazil: A Review, International Geology Review, 36:6,...rights reserved. Geology and Mineral Resources of Brazil: A Review INACIO DE MEDEIROS DELGADO, AUGUSTO J...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil AND CHARLES H. THORMAN US. Geological Survey, Denver |  | | Catalog/List | | will fit into their crystal structure. When the Iron that is normally present in pegmatite pockets is...Compared to the output of place such as Afghanistan or Brazil, the production from Elba is relatively small....59 BRAZIL 73060 TOPAZ var. IMPERIAL TOPAZ Ouro Preto, Iron Quadrangle, Minas Gerais, Brazil This specimen...var. ROSE QUARTZ GalilĂ©ia, Doce Valley, Minas Gerais, Brazil Here is a cockscomb arrangement of Rose...Itatiaia mine, Conselheiro Pena, Doce Valley, Minas Gerais, Brazil This rather sizable, pale blue-green Aquamarine |  | | Journal (issue) | | Rossman The Indaia Sapphire Deposits of Minas Gerais, Brazil David S. Epstein, Warren Brennan, and Tulio...located in eastern Bolivia, near the border with Brazil [figure 2). The Anahi mine produces ametrine crystals...1986) described similar material purportedly from Brazil. There are also some accounts that the deposit...Anahi area and on importing the gem material into Brazil, early reports identified the source as being in...virtually impossible for gems mined in Bolivia to enter Brazil legally. To circumvent these restrictions, the |  | | Journal (issue) | | kunzite), 9 cm, from the Urucum mine, GalilĂ©ia, Minas Gerais, Brazil. Gus & Jane Eifler collection; Holly Smith...Record, NovemberâDecember, 2020 13 Kevin Brown Beryl (var. heliodor), 6.6 cm, from Riverside County,...Topaz, 15 cm, from Hematita, Antonio Dias, Minas Gerais, Brazil. Tom Spann photo. (below right) Spinel...Aquamarine, 9 cm, from Corrego SĂŁo Francisco, Minas Gerais, Brazil. Tom Spann photo. Rhodochrosite on manganite...Almandine-spessartine on albite, 4.9 mm, Poaia pegmatite, Minas Gerais, Brazil. Beth Van Allen photo. 24 Elbaite tourmaline |  | | Journal (issue) | | Moore Recent discoveries of hydroxylherderite in Minas Gerais ..............................................dissolved iron from pyrite. Surface dilution soon reduces the acidity, causing large quantities of iron to precipitate...precipitate out of solution as yelloworange iron hydroxide. Mine-polluted water almost always carries...Ilha do Fundao 21.910 Rio de Janeiro, Brazil INTRODUCTION Brazil is world famous for its several occurrences...prized by collectors. These occurrences, all in Minas Gerais, are described below along with the specimens |  | | Catalog/List | | at a minimum. The specimen was collected in the Iron mines on the Island of Elba, possibly around 1790...stunning and pristine condition for a chunk of lowly Iron ore and comes with a custom acrylic base. Overall...listing a specimen as being from âNevadaâ or âMinas Gerais.â The situation has not markedly improved with...find in spite of the fact that many, very large, Iron ore bodies are crawling with the stuff. Even more...Surprisingly, this mine was operated for Talc, not Iron ore. Besides the overall cubic form there are tetrahexahedral |  | | Catalog/List | | Styrian Erzberg, Styria, Austria The âFlowers of Ironâ as the old name âFlos Ferriâ translates, refers...refers to the âflowersâ growing from the walls of an Iron mine in Austria that has been worked for centuries... This fine example is notable for the role that iron minerals played in giving it a lovely golden color...spheres of some unidentified mineral, presumably an iron or manganese oxide. The usual fracturing around... 53021 MANGANITE Penokee Group, Ironwood, Gogebic Iron Range, Gogebic Co., Michigan, USA Very, very rarely |  | Gonçalves, Guilherme O., Lana, Cristiano, Buick, Ian S., Alkmim, Fernando F., Scholz, Ricardo, Queiroga, Glaucia (2019) Twenty million years of post-orogenic fluid production and hydrothermal mineralization across the external AraçuaĂ orogen and adjacent SĂŁo Francisco craton, SE Brazil. Lithos, 342. 557-572 doi:10.1016/j.lithos.2019.04.022 | Journal (article/letter/editorial) | | AraçuaĂ orogen and adjacent SĂŁo Francisco craton, SE Brazil Guilherme O. Gonçalves, Cristiano Lana, Ian S...AraçuaĂ orogen and adjacent SĂŁo Francisco craton, SE Brazil, LITHOS, https://doi.org/ 10.1016/j.lithos.2019...AraçuaĂ orogen and adjacent SĂŁo Francisco craton, SE Brazil Guilherme O. Gonçalvesa,* goncalves.go@icloud.com... Universidade Federal de Ouro Preto, Escola de Minas, Departamento de Geologia, Campus Morro do Cruzeiro...(eastern border of the SĂŁo Francisco craton, SE Brazil). We sampled hydrothermal minerals (monazite, rutile |  | | Journal (issue) | | iridescence observed in ârainbowâ hematite from Minas Gerais, Brazil. 40 DNA Techniques Applied to the Identification...carats âą Fancy Deep brown-orange CVD synthetic 66 Beryl crystal in fluorite âą Diamond with extraordinary...iridescence in metamorphic ârainbowâ hematite from Brazil. The authors use electron microscopy, atomic force...colored by GR1 defects have been alluvial deposits in Brazil, Guyana, Venezuela, Zimbabwe, the Central African...never graded by GIA), and the 5.03 ct Aurora Green (Brazil), which sold at auction in 2016 for more than US |  | | Catalog/List | | 7 Meteorites 72004 Gebel Kamil Meteorite Slice Iron (ungrouped) East Uweinat Desert, Egypt The Gebel...Starting Bid: $250 72005 Odessa Meteorite End Cut Iron, IAB-MG Odessa, Ector County, Texas, USA Another...Bid: $2,500 72006 Campo del Cielo Meteorite Slice Iron, IAB-MG Chaco, Argentina Found: 1576 This small...are also called, are elongated crystals of nickel-iron consisting of interwoven ribbons of Taenite and...material only found in meteorites and not on Earth. The iron composition of this Campo del Cielo showcases the |  | | Report (issue) | | vanadium 50.94 chromium 52.00 manganese 54.94 iron 55.85 cobalt 58.93 nickel 58.69 copper 63.55...contain strong permanent magnets composed of neodymium-iron-boron. Photograph courtesy of Iberdrola Renewables...rare-earth elements, and antimony in China; niobium in Brazil; and platinum-group elements in South Africa and...up to 42 percent beryllium oxide, and industrial beryl, which can contain up to about 5 percent beryllium...sedimentary manganese deposits that are not enriched in iron................................................ |  | | Book (edition) | | sometimes red tinges, cobalt shows pink shades, while iron displays pronounced tones of red, brown, and occasionally...pore-fillings of gold (yellow). Right: Finely laminated iron oolith with a relatively coarse core of oolite fragment...form from magnetic precursors, such as greigite (iron-thiospinel; Fe3S4) which, during mild pore water...bluish isotropic Wairauite yes Pararammelsbergite Iron, native Rammelsbergite pure white; 56.8 weak, yellow...Cadmium, native Copper, Hematite, Ilmenite, native Iron, Jarosite, native Lead, Magnetite, Moissanite, Pyrite |  | | Book | | American Craton 2.7.1 Guiana Shield 2.7.2 Central Brazil Shield 2.8 African Craton: Southern Africa 2.8...3.7.2 Goias Massif, Tocantins Province, Central Brazil Shield 3.7.3 Sao Francisco Craton, Atlantic Shield...Craton 4.7.1 Amazonian Craton: Guiana and Central Brazil Shields (less Tocantins Province) 4.7.2 S5o Francisco...Francisco Craton 4.7.3 Tocantins Province (Central Brazil Shield) 4.8 African Craton: Southern Africa 4.8...composition 6.3.2 Uraniferous conglomerates 6.3.3 Banded iron formation (BIF) 6.3.4 Redbeds and paleosols 6.3 |  | | Book | | American Craton 2.7.1 Guiana Shield 2.7.2 Central Brazil Shield 2.8 African Craton: Southern Africa 2.8...3.7.2 Goias Massif, Tocantins Province, Central Brazil Shield 3.7.3 Sao Francisco Craton, Atlantic Shield...Craton 4.7.1 Amazonian Craton: Guiana and Central Brazil Shields (less Tocantins Province) 4.7.2 S5o Francisco...Francisco Craton 4.7.3 Tocantins Province (Central Brazil Shield) 4.8 African Craton: Southern Africa 4.8...composition 6.3.2 Uraniferous conglomerates 6.3.3 Banded iron formation (BIF) 6.3.4 Redbeds and paleosols 6.3 |  | | Catalog/List | | Conselheiro Lafaiete, Belo Horizonte, Minas Gerais, Southeast Region, Brazil Bright, watermelon red is the dominant...do Norte, GalilĂ©ia, Doce Valley, Minas Gerais, Southeast Region, Brazil Of all the various colors that...scepter habits. So far, an out-of-the-way corner of Brazil is the only source for these rarely seen wonders...brassy wedge-shaped crystals of Chalcopyrite (a mixed iron/copper sulfide) nestled in among some colorless...PALLADIAN GOLD Itabira, Iron Quadrangle, Minas Gerais, Southeast Region, Brazil One of the problems associated |  | | Book | | Geosciences Institute University of SĂŁo Paulo SĂŁo Paulo Brazil Pedro Oyhantçabal Departamento de GeodinĂĄmica Interna...recognized similarities in the âold granitesâ of Brazil and southern Africa. On the other hand, du Toit...âBrazilian systemâ deïŹned by Alcide dâOrbigny in Brazil (Beaumont 1844), arguably corresponding to the...geochronological data of the Precambrian basement of southern Brazil, Uruguay and Argentina were reported by Hart (1966)...and geochemical data of the Nico PĂ©rez Terrane in Brazil and Uruguay in order to constrain its regional |  | | Book | | Australia Ying Gu 8th 2004 Aguas de Lindoia, Brazil Henrique Kahn 7th 2000 Göttingen/Hannover,...BjĂžrn Eske SĂžrensen Norway Dr. Carina Ulsen Brazil Prof.Dr. Rolf Arne Kleiv Dr. Prof.Dr. Rune B...Comparing the mineralogical characterisation of iron ore by using QEMSCAN and PTA Oghazi, P, and PĂ„lsson...diffraction (XRD) and cluster analysis to grade control of iron ores Paine, M, König, U, and Staples, E 495 60...Ca2(Fe2âXAlX)O5 Raab, B and Pöllmann, H 67 Mineralization of iron deposits from Dehbid Area, Fars Province, South |  | | Book (edition) | | burning bowl of oil, and to others, a ball of red-hot iron. Most favored the notion that movements of celestial...how did elements such as carbon, sulfur, silicon, iron, gold, and uranium form? These elements, which are...number of 26 (iron). Very large atoms (atoms with atomic numbers greater than that of iron) require even...10/2/07 11:43 AM Page 28 rock surrounding a core of iron alloy, as does the Earth. The next four have traditionally...temperature rose sufïŹciently to cause melting, denser iron alloy separated out and sank to the center of the |
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