 | | Journal (article/letter/editorial) | | THE JACOBINA CONGLOMERATE, DENNIS AURIFEROUS BRAZIL P. COX ABSTRACT Gold occurs in conglomeratebeds...Jacobina Series of Precambrian age in northeastern Brazil. The series is 8,000 m thick and includespelitic...northwestof Salvador,Bahia, Brazil (Fig. 1). The depositswere describedby Flaherty (unpub. mine reports, 1950-51)...sponsored by the University of Bahia, and the resultswere publishedin Brazil (6). The brief summaryof this...JacobinaLtda., who suppliedmuch information on the Canavieiras mine, and to A. V. Heyl, D. L. Schmidt,and G. W |  | Teixeira, João Batista Guimarães, de Souza, Jorge André Braz, da Silva, Maria da Glória, Leite, Carlson Matos Maia, Barbosa, Johildo Salomão Figueiredo, Coelho, Carlos Eduardo Silva, Abram, Maisa Bastos, Filho, Valter Mônaco Conceição, Iyer, Sundaram S.S. (2001) Gold mineralization in the Serra de Jacobina region, Bahia Brazil: tectonic framework and metallogenesis. Mineralium Deposita, 36 (3) 332-344 doi:10.1007/s001260100174 | Journal (article/letter/editorial) | | mineralization in the Serra de Jacobina region, Bahia Brazil: tectonic framework and metallogenesis Received:...deposits in the Serra de Jacobina region in Bahia, northeastern Brazil, occur in a belt of siliciclastic metasedimentary...Federal da Bahia (CPGG/IGEO/UFBA), Campus UniversitaÂrio de Ondina, CEP 40170-290, Salvador, Bahia, Brazil...2862, Centro Administrativo da Bahia, CEP 41213-000, Salvador, Bahia, Brazil V.M.C. Filho Companhia Baiana...460, Centro Administrativo da Bahia, CEP 41750-300, Salvador, Bahia, Brazil S.S.S. Iyer Department of Physics |  | Milesi, J.P, Ledru, P, Marcoux, E, Mougeot, R, Johan, V, Lerouge, C, Sabaté, P, Bailly, L, Respaut, J.P, Skipwith, P (2002) The Jacobina Paleoproterozoic gold-bearing conglomerates, Bahia, Brazil: a “hydrothermal shear-reservoir” model. Ore Geology Reviews, 19 (1) 95-136 doi:10.1016/s0169-1368(01)00038-5 | Journal (article/letter/editorial) | | Paleoproterozoic gold-bearing conglomerates, Bahia, Brazil: a ‘‘hydrothermal shear-reservoir’’ model J...– Ni-bearing minerals (euhedral chromite, Cr – rutile, linnaeite, Cr – tourmaline and fuchsite) and euhedral...Jacobina basin in the São Francisco province of Bahia, Brazil are of special interest relative to this debate...located 370 km northwest of Salvador in Bahia State, Brazil. It is 200 km long by 15 –25 km wide, culminates...muscovite– fuchsite, zircon, nonchromiferous detrital rutile, detrital chromite, and monazite. Significant changes |  | Ledru, P., Mile´si, J.P., Johan, V., Sabate´, P., Maluski, H. (1997) Foreland basins and gold-bearing conglomerates: a new model for the Jacobina Basin (Sa˜o Francisco province, Brazil) Precambrian Research, 86 (3) 155-176 doi:10.1016/s0301-9268(97)00048-x | Journal (article/letter/editorial) | | for the Jacobina Basin (S o Francisco province, Brazil) P. L e d r u a,,, j . p . Mil6si a, V. J o h a...the Jacobina Basin in the S~o Francisco province (Brazil) is representative of the foreland basins that...conglomerates (sulphide, fuchsite, tourmaline, chromite, rutile), leaching of ultrabasic rocks, and phlogopite...Davis et al., 1994), Franceville (Gabon), Jacobina (Brazil) and the North Guiana trough (French Guiana), have...sense, the Palaeoproterozoic Jacobina Basin in Brazil, which has so far produced about 50 t of gold, |  | | Journal (article/letter/editorial) | | Abstract Brazil has been a major but intermittent producer of gold since its discovery in 1500. Brazil led...hosted in Archean rocks produced 66% of the gold in Brazil, whereas deposits in Paleoproterozoic and Neoproterozoic...lia, Brazil E.A. Ladeira Rua Muzambino 355/404, Belo Horizonte, Minas Gerais 30310-280, Brazil Deposits...importance. The Archean and Paleoproterozoic terranes of Brazil largely lack base-metal-rich volcanogenic massive...in the CarajaÂs Mineral Province. Introduction Brazil has been an important producer of gold for centuries |  | Teles, Guilherme S., Chemale, Farid, Ávila, Janaína N., Ireland, Trevor R., Dias, Airton N.C., Cruz, Daniele C.F., Constantino, Carlos J.L. (2020) Textural and geochemical investigation of pyrite in Jacobina Basin, São Francisco Craton, Brazil: Implications for paleoenvironmental conditions and formation of pre-GOE metaconglomerate-hosted Au-(U) deposits. Geochimica et Cosmochimica Acta, 273. 331-353 doi:10.1016/j.gca.2020.01.035 | Journal (article/letter/editorial) | | Pyrite in Jacobina Basin, São Francisco Craton, Brazil: Implications for Paleoenvironmental Conditions...Pyrite in Jacobina Basin, São Francisco Craton, Brazil: Implications for Paleoenvironmental Conditions...Pyrite in Jacobina Basin, São Francisco Craton, Brazil: Implications for Paleoenvironmental Conditions...Universidade Federal de Campina Grande, Campina Grande, Brazil 2Programa 3Programa de Pós-Graduação em Geologia...Geologia, Universidade de Brasília, Brasília, Brazil de Pós-Graduação em Geologia, Universidade do Vale do |  | | Book (volume) | | Diffraction, which is above note for p. 7, line 16). Rutile (q.v.) has a dispersive power over six times greater...than that of diamond. 44, line 32. Today synthetic rutile is commonly faceted into gemstones under the commercial...ruby, sapphire, star sapphire, emerald, spinel, rutile, and other stones are produced in large quantities...Cullinan," was found at the p. 127, line 5. Premier Mine, Transvaal, South Africa. It weighed 3106 carats...as a gem. state of Minas Geraes, (1968) It is Brazil. found principally in San Diego County, Heat treatment |  | | Report (issue) | | Monazite localities-Continued South America-Continued Brazil-Continued Beach placers _________________________..._____________________ _ Espirito Santo _____________________ _ Bahia ____________________________ _ Paraiba do Norte...and Idaho. Most of the world output has come from Brazil, India, and the Republic of South Africa, but 12...in which monazite is associated with ilmenite, rutile, cassiterite, wolframite, and gold. 238-813-6.7--2...from 1948 until at least 1961 at extensive zircon-rutile placers along the southeastern coast of Queensland |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Report (issue) | | America........................................... Brazil............................................. Argenti...Shield-Bancroft district and nearby areas, (3) eastern Brazil areas, (4) Central and Western Europe, (5) southern...Africa, India, Madagascar, Finland, U.S.S.R., and Brazil); (2) at the margins and locally along the axial...Joachymov, Czechoslovakia, and at Schwartzwalder mine, Colorado, U.S.A.). Uranium deposits have been found...Mediterranean Sea from Morocco to Israel, and near Recife, Brazil . Uraniferous phosphorite fills large depressions |  | | Report (issue) | | Persi~ • •• ••• Siam ••• • • •• ••• Argentina Brazil ••• •• -· ••• .. ' .. " •• •• • • • •...compact. A special variety of diamo~d peculiar to Brazil is known as carbonado or '' carbon ''; it is black...named kinds containing needle-like inclusions of rutile, homblend.e, rnanganite, gmthit,e or othe-1" minerals...Russia, Brazil, South-West Africa. Topaz.-Brazil, Russia, Japan, Southern Rhodesia. · Be1"yl.-Brazil, Madagascar...Russia. OlirysoberyZ.--C'e ylon, India, Russia, Brazil, Southern Rhodesia. Spinel.--Oeylon, .l n•dia, |  | | Book | | come not merely from one district but from a single mine. Thus the physical properties of many rocks and...eclipsing the mineral magnesite in some areas; the trona mine rather than the Solvay plant is now the main source...ash in the US; ilmenite is upgraded to “synthetic rutile” as a feed for titanium-dioxide plants. Some producers...to oil rigs all over the world, and Australian rutile and ilmenite going to manufacturers of TiO2 pigment...da Barita by Ministério das Minas e Energia in Brazil; and the numerous commodity profiles and reports |  | | Book | | MINES AND MINERALS IN BRAZIL --= ··--· ··- ·-·=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr·icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Book | | . . . . . . . . . . . . . . . . . . . . . . . Brazil . . . . . . . . . . . . . . . . . . . . . . . ......... . ..... . ........ . ................ . Brazil ...... . .... .... ............... .. ....... ...allanite, and sphene; but perovskite, melanite, rutile, and cassiterite, all of exceedingly weak radioactivity...and quartz (black) which also replaces core. Bigay mine, Lachaux, Auvergne, France ( X 100) ( Geffroy and...; southern Norway; northern Karelia, U.S.S.R.; Brazil, in Minas Gerais at Brejauba and Engenho Central |  | | Book | | I sell my uranium ore?" "Do I need a license to mine uranium?" "How do I stake a mining claim?" As a...exceptions, the best place to look for a uranium mine is where uranium is known to exist. Descriptions...beryllium is a per cent), however, in a variety of mine, mill, and smelter products, particularly flue gases...principal product of the Shinkolobwe mine, Belgian Congo the Eldorado mine, Great Bear Lake, Northwest Territories...when additional exploration at the old Radium Hill mine near Olary, South Australia, an early producer |  | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production... Svisero, James E. Shigley, and Robert Weldon Brazil, which commanded global production in the 1700s...Gerais and Mato Grosso, are presented. W hile Brazil is widely known for the production of colored gemstones...carbonados) were also recovered, mainly from the state of Bahia (Karfunkel et al., 1994). As Africa emerged as the...deposits. According to Kimberley Process statistics, Brazil produced 31,825 carats in 2015, although this figure |  | | Report (volume) | | coasts of Cuba, Hispaniola, Puerto Rico, Venezuela, Brazil, Panama, Costa Rica, and North America between...gaps appear to exist off Patagonia and southern Brazil. The chart coverage shown by plate 1 may tend to...widespread areas: monazite, ilmenite, rutile, and zircon in Florida and in Brazil; gold, platinum, and chromite...found at Nome, Alaska, and monazite, ilmenite, rutile, and zircon are present in some of the ancient...beaches in Florida and in presentday beaches in Brazil (fig. 6). Similar placer deposits can be expected |  | | Report (issue) | | between galena sphalerite, Darwin Lead-Silver-Zinc mine, Inyo County, California, Econ. Geol., v. 66, p..., Bingham 1971, mining U. xiii S. study mine, of the '"'B" limestone Bingham mining The age...Finally, to that fine group of scientists and men, the mine geologists of the Americas, who have taken time...British White, D., 1968, 1961, 6, p. 39-50, 52 mine now in production: (particularly, of the Brenda...Columbia: W. H., Hypothermal-1 183-212 Brenda mine, British mo. ©6705) peal53=157 Little, Molybdenum |  | | Book (volume) | | and the corresponding citation (Hudson Bay 309 mine). in Ref. 4, line Z, for 670 read 676. 310 in...say that this guarantee did much to deterrepaid. mine the award of the grant. To Mr. W. 0. Wiley, Chairman...similarities when the ratio A -\- B For example, rutile, Ti02, is in the simple classes. same as the ratio... Bibliography 71 Ferraz (1929). Compendio dos Mineraes do Brazil en forma de Dicdonario, by 645 pp., Rio de Janeiro...pegmatite minerals together with scheelite (Natas mine, South- West Africa); in contact metamorphic deposits |  | | Book | | a U a < O SCIENTIFIC RESULTS or A JOURNEY IN BRAZIL. ¿T. LOUIS AGASSIZ, ’H I S TRAVELLING COMPANIONS...COMPANIONS. GEOLOGY AND PHYSICAL .OF B y GEOGRAPHY BRAZIL. ÓH. FBED . HARTT, P R O F E S S O R o r Q B...volume on the Physical Geography and Geology of Brazil as a summary of the scieutiftc results of my explorations...is the result of two journeys made by myself in Brazil. The first was undertaken under the direction of...Physical Geogi’aphy of the coast between Rio and Bahia, going over a very large part of the ground on. |  | | Report (issue) | | must know not only in which direction a particular mine opening should be extended to continue in an ore...changing as the advance of technology permits us to mine or process minerals that were once too low in grade...technologic advances will make it profitable to mine resources that would be much too costly to produce...are at least a few prematurely deserted mills and mine installations built on the expectation of finding...Liberia, Sierra Leone, South-West Africa, Tanzania, Brazil, Guyana, India, Indonesia, and Venezuela. Diamond |  | | Book | | the mines of South Africa and India, Zaire and Brazil, Sierra Leone and Venezuela, Angola and Borneo...Facts and Figures The Portuguese Diamond Policy Brazil and the Diamond Trade G. Lenzen 66 68 69 73 74...Enterprise H. Allen 125 125 Tanzania The Williamson Mine 127 127 129 130 131 132 136 The Creation of La...Gerais Diamantina The Tejucana Mine H. Allen Zaire R. Maillard Brazil 180 180 182 184 186 Other Producers...country that produced them. From ancient times until Brazil entered the picture in the eighteenth century, |  | | Book (volume) | | TAGE TAGE Occurrence of Diamond 1. India .... 2. Brazil .... 3. South Africa 4. Borneo 5. Australia 0....Iron-pyrites.532 H sematite.533 Ilmenite ..534 Rutile.534 Amber.535 Jet.556 THIRD PART DETERMINATION... ?! 8. 9. 162 Diamond, crystal in matrix : Brazil. 2. „ 190 S. Africa 125 125, 173 ..... 265...DIAMOND-WASHING IN BRAZIL . . . 168 PLATE VII. (Facing p. 198.) KIMBERLEY DIAMOND MINE IN 1872 . . 197... PLATE VIII. (Facing p. 202.) KIMBERLEY DIAMOND MINE IN 1874 . ,, ,, „ (Westside)in 1885 199 200 PLATE |  | | Book | | migmatizadas; • greenstone belts, como os do Pará, Goiás, Bahia e Minas Gerais, afetados por metamorfismo de baixo...porções do Cráton São Francisco em Minas Gerais e Bahia, e Goiás), e outros menores (Rio Grande do Norte...porções do Cráton São Francisco em Minas Gerais e Bahia, Goiás), e outros menores (Pernambuco, Ceará, Goiás...do Campestre (leste do Rio Grande do Norte) e na Bahia, com pequena extensão para Pernambuco (Fig. 2)....final do Arqueano (2,8-2,6 Ga), chamado Jequié, na Bahia, e Rio das Velhas, em Minas Gerais. A ele se devem |  | De Vivo, B., Ippolito, F., Capaldi, G., Simpson, P. R. - Eds. (1984) Uranium geochemistry, mineralogy, geology, exploration and resources. Springer Netherlands. doi:10.1007/978-94-009-6060-2 | Book | | drape around permeability barriers in a uranium mine, so the colour bands follow the same 28 Medium...is evidenced by mineral formation on the walls of mine drifts in a matter of months after the drifts have...first reported by Muto et al. 115 from Ningyo-toge mine, Tottori Prefecture, Japan, where it occurs as the...the true formula. Bergenite is found in dumps at a mine at Streuberg in Saxony, where it forms yellow crusts...Morin 28 from the mineralized sandstones of Mounana mine, Gabon, where it occurs with francevillite. Francevillite |
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