 | | Journal (article/letter/editorial) | | AURIFEROUS REEFS AT JACOBIN& BRAZIL j.D. BATEMAN ABSTRACT Near Jacobina,Brazil, are uranium-bearing gold...conglomerate reefs in the Serra de Jacobina,State of Bahia, Brazil, have beenworkedat intervalsover many years...present,otherthan smallnativeworkings,only the Canavieiras mineis in production,treating someten tons of...pebbleconglomerates.Why not uranium? The only specimen of Canavieiras mine ore availableto the writer in Canadawas testedwith...4URIFEROUS REEFS, BRAZIL GEOLOGICAL 419 SETTING Jacobinais situatedin the State of Bahia, 170 miles northwestof |  | | 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 |  | | Journal (article/letter/editorial) | | Origin for Auriferous Conglomerates, Canavieiras Mine, Jacobina,Brazil W. H. Gaoss Abstract Quartz-pebbleconglomerates...of early Precambrianage. In a sectionthrough the mine there are 28 conglomerate beds (>0.5 m thick) totalling...detailed mapping of the mine area at conglomerates of Precambrian age at' Jacobina, Brazil. In 1958 BatemancomparedJacobinato...availableto Cox, bearing on the origin of the gold at the mine. History.--Gold, from both lode and placer deposits...probablysmall. The Canavieiras a distinctverticalor horizontalsortingof the boulders mine,nearthe town of |  | 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...zones for postsedimentary mesothermal quartz – tourmaline – muscovite/fuchsite lodes, which constitute...(euhedral chromite, Cr – rutile, linnaeite, Cr – tourmaline and fuchsite) and euhedral pyrite that crystallized...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 |  | 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...mineralized conglomerates (sulphide, fuchsite, tourmaline, chromite, rutile), leaching of ultrabasic rocks...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 |  | | Book (volume) | | 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...therefore, that the work is as much hers as it is mine. I L. J. S. December 1903. PREFACE The desire... History Museum, and representing the Kimberley mine, the richest and most famous of the Cape diamond...Other forms „ 7a, b. Rose recoupee ,, ,, 162 Brazil : S. ., , sphere of Bort Ruby, 6. 7. crystal |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...McReath Spine photograph: Crystal of multicolored tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro...Fineart Print Inside cover photographs: "Parafba" tourmaline (25 x 6 mm), Sao Jose da Batalha, Parafba. Courtesy...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 |  | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production...production. pg. 3 34 Cuprian Liddicoatite Tourmaline Yusuke Katsurada and Ziyin Sun Identifies 13 copper-bearing...Titaniumdiffused synthetic sapphire • Coated Paraíba tourmaline • Rubellite with strong “pink sleeves” pg. 106...paintings • Designs from Paula Crevoshay • Nigerian tourmaline and sapphire • Turquoise Starship Enterprise...combining Brazilian diamonds, cuprian liddicoatite tourmaline, Japanese jadeite, iris quartz, synthetic zincite |  | | Report (issue) | | Persi~ • •• ••• Siam ••• • • •• ••• Argentina Brazil ••• •• -· ••• .. ' .. " •• •• • • • •...always been eBteemed above all other stones, while tourmaline is perhape more favoured in the United States...compact. A special variety of diamo~d peculiar to Brazil is known as carbonado or '' carbon ''; it is black...yellow, wl1atever its source may have been. Tourmaline.-Tourmaline is a beau tiful semi-pI·ecious stone which...stones ar•e obtained. The very marked dichroism of tourmaline is one .of its most charac,t eristic features |  | | Report (volume) | | Cristallographie Bull. Bulletin de la Socie"t6 Franchise de Mine"ralogie et de Cristallographie. Paris, France. Soc...p. 48-55, 7 references, 1967. The gold-quartz-tourmaline veins of Ondonoc occur in diorites and schists...crystallization phases. In addition to an early prismatic tourmaline, a late phase "metasomatic" tourmalinization...schist shear zones cutting greenstones. The Ptarmigan mine and other similar deposits are ore bodies occurring...and sodium chloride in concentrations common in mine waters dissolve gold readily, (3) free hydrochloric |  | | 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...beaches and elevated bars along the southern coast of Brazil were the world's main source of commercial monazite...international importance. Stream placers in the interior of Brazil are virtually unexplored; they may constitute an |  | | 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) | | 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 | | . . . . . . . . . . . . . . . . . . . . . . . Brazil . . . . . . . . . . . . . . . . . . . . . . . ......... . ..... . ........ . ................ . Brazil ...... . .... .... ............... .. ....... ...hornblende), pyroxenes ( especially augite), tourmaline, cordierite, and andalusite. Halos also have...and quartz (black) which also replaces core. Bigay mine, Lachaux, Auvergne, France ( X 100) ( Geffroy and...monazite, smoky quartz, reddish feldspar, beryl, tourmaline, muscovite, biotite, garnet, apatite, and in |  | | Book (volume) | | TAGE TAGE Occurrence of Diamond 1. India .... 2. Brazil .... 3. South Africa 4. Borneo 5. Australia 0....Demantoid Grossularite, Melanite, Topazolite . Tourmaline Opal Precious opal . Fire-opal Common opal .... ?! 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 | | 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... silicates such as pyroxene, amphibole and tourmaline. The by the size and number The more regular...principal product of the Shinkolobwe mine, Belgian Congo the Eldorado mine, Great Bear Lake, Northwest Territories |  | | 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...da Barita by Ministério das Minas e Energia in Brazil; and the numerous commodity profiles and reports...Considerations damage, Soviet Union Canada Chrysotile Brazil Zimbabwe Chrysotile South Africa Amosite Crocidolite...chrysotile. One of these bodies is worked at the Advocate Mine near Baie Verte. The canoe-shaped body is contained |  | | 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. |  | | 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 (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... 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...scheelite, ankerite, tourmaline. In quartz veins (Porcupine, Ontario; Homestake mine. Lead, South Dakota; |  | | Report (issue) | | sandstone and the Aphebian basement of the Key Lake mine and other uranium deposits in the eastern Athabasca...... 5,811 a lncludes number of employees for mine, mill, and general. Does not include employees for...Arizona, Colorado, and Utah also reported significant mine and mill employment in activities related to the...conventional mining and milling does. However, mine recovery is about 60 percent when Table 4 Number...reserves. Complete control of the Rabbit Lake mine/mill complex was purchased by Eldorado Mines, Ltd |  | | 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 | | The original Turin Papyrus of the Egyptian gold mine (circa 1320 B.C.), the oldest geological map extant...script on the Turin Papyrus of the Egyptian gold mine (after Ball, 1942; see chapter 3). GOLD History...Enrichment and Supergene Transport of Gold, Calhoun Mine, Lumpkin County, Georgia I 581 Econ. Geology 66:178...fabulous placer deposits of the Choco in Colombia. In Brazil gold was sought by the Portuguese during the last...in Nevada were under development. The Homestake mine, at Lead, South Dakota, was found in 1876 and brought |
|
