 | | 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...gold has been found associatedwith stringers of pitchblende. These facts suggestthat the original placer...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 |  | | 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 |  | | Report (volume) | | Uranium at Morro do Vento Serra de Jacobina Brazil GEOLOGICAL SURVEY BULLETIN Prepared for the U.S...Vento Serra de Jacobina Brazil By MAX G. WHITE URANIUM INVESTIGATIONS IN BRAZIL GEOLOGICAL SURVEY BULLETIN...pocket FIGURE 1. Index map of a part of eastern Brazil.________-___--_.---__ A2 2. Map of Morro do Vento... URANIUM INVESTIGATIONS IN BRAZIL URANIUM AT MORRO DO VENTO, SERRA DE JACOBINA BRAZIL By MAX G. WHITE ABSTRACT...south of the town of Jacobina in central Bahia, eastern Brazil. Morro do Vento is one of the hills that |  | 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...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...which, from north to south, are Serra Branca, Canavieiras, Morro do Vento (Itapicuru), and João Belo (Fig...Bouchot, 1993; Mascarenhas et al., 1998). The Canavieiras mine, between 1950 and 1966, produced 115 653 t |  | | Report (issue) | | America........................................... Brazil............................................. Argenti...minerals (pitchblende and uraninite) occur either in extensive bedded deposits of pitchblende in sedimentary...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 |  | | Book | | were quite sound and to the point: "I have pitchblende on my land. What shall I do with it?" "How much...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...fewer in which uranium the major constituent. Pitchblende and uraninite is contain theoretically up to |  | | Book | | . . . . . . . . . . . . . . . . . . . . . . . Brazil . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . Pitchblende-Pyrite ( ± Pb, Cu, Ag Sulfides) Type . . . ..... . . . . . . . . . . . . . . . . Siliceous Pitchblende-SuIBde Veins . . . . . . . . . . . . . . . .......... . ..... . ........ . ................ . Brazil ...... . .... .... ............... .. ....... ...radioactive, is always well crystallized. Metamict pitchblende ( uraninite) has been reported ( Conybeare and |  | 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 | | were unknown until 1780, when Wagsfort found a pitchblende sample in 10hanngeorgenstadt. This discovery...species of a zinc mineral-hence the n':lme 'pitchblende' (= pitch-like blende). Seven years later, Klaproth...the separation and, in so doing, reduced the pitchblende. His attempt was not successful and only U02...which, in 1780, Wagsfort had found the first pitchblende sample. The other known mineral deposits at that...Becquerel discovered the radioactive property of pitchblende and the Curies isolated radium. Suddenly scientists |  | | 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 |  | | 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 |  | | Report (issue) | | Precambrian massive sulfide deposit, Copper King mine, Front Range, Colo., P. K. Sims and Priestley Toulmin...quartzite-conglomerate of the Serra de Jacobina, Brazil, by Max G. White ----Hydrologic studies 5. Mag·nitude...States-Continued 37. Variations of pH with depth in anthracite mine-water pools in Pennsylvania, by Wilbur T. Stua~t...PRECAMBRIAN MASSIVE SULFIDE DEPOSIT, COPPER KING MINE, FRONT RANGE, COLORADO By P. K. SIMS and PRIESTLEY...Colo., and Washington, D. C. '·· The Copper King mine, at Prairie Divide in Lari- of the ore minerals |  | | Book | | Australia (Elias and others 1981, table 1) 2. Brazil (Esson and Carlos 1978, table 3) 3. New Caledonia...(Kasakhstan) Silurian (Brazil) Carnbrian (mostly Siberia) Proterozoic (mostly Brazil, South Africa, China)...banded iron-formation like Urucum, in Mato Grosso, Brazil (Varentsov 1964, p. 5). In addition to Morocco...minerals: uraninite (more oxidized varieties termed pitchblende) coffinite ningyoite V6+ minerals: carnotite...(allogenic) Carbon Leader, Witwatersrand (fine pitchblende in carbon) 8.5 9 15 13.5 19' 172 32' 222 |  | | 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... In quartz veins (Porcupine, Ontario; Homestake mine. Lead, South Dakota; Morro Velho, Minas Geraes); |  | | 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 |  | | Book | | base of the Complex (Vermaak, 1976). At the Atok mine, platinoid minerals tend to occur at the boundaries...contains uranin¬ ite and uranothorite; whereas pitchblende, with part of its uranium hexavalent, is more...common in youn¬ ger conglomerates in Minas Gerais, Brazil, and West¬ ern Australia (Robertson et al., 1978)...belt of southern Africa and in similar rocks in Brazil, and there are scattered minor occurrences in the...Rye, D. M., and Rye, R. O., 1974, Homestake gold mine; I. Stable isotope studies: Econ. Geol., v. 69, |  | | 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 |  | | 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 | | of the Calumet and Hecla Conglomerate, Centennial Mine, Calumet. Michigan. Geol Soc Am Bull 96:1188-1193...Hirvivaara, H6IHirinvaara, and in the abandoned uranium mine of Paukkajanvaara. The maximum thickness of the...Canada (Young 1973 ; Gay and Grandstaff 1979), Brazil (Cox 1967) and South Africa (Button and Tyler 1981...environment of the Jacobina auriferous conglomerate, Brazil. Econ Geol 62: 773 - 780 Gay AL, Grandstaff DE...site whereas that on greenstone is from the Denison mine. Sericite and quartz predominate in the groundmass |
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