 | | Journal (article/letter/editorial) | | Telluride mineralization at Ashanti gold mine, Ghana R. J. BOWELL, R. P. FOSTER Department of Geology...Road, London SW7 5BD Abstract Gold mineralization at the Ashanti Mine occurs in shear zones which are...zone. However, gold-rich telluride mineralization in veins in the hangingwall of the Obuasi ore zone at...at Ashanti appears to have post-dated development of the major gold-bearing shear zone. Complex assemblages...high fo2 and high fT~2/f%. Replacement of earlier gold-sulphide mineralization is indicated. The fluids |  | | Journal (article/letter/editorial) | | Sulfide Oxidation and Production of Gossans, Ashanti Mine, Ghana R. J. Bowell a a Department of Geology...Sulfide Oxidation and Production of Gossans, Ashanti Mine, Ghana, International Geology Review, 36:8, 732-752...Sulfide Oxidation and Production of Gossans, Ashanti Mine, Ghana1 R. J. BOWELL Department of Geology,...the Justice mine, in the Ashanti goldfields of southwestern Ghana, chemical weathering of gold-bearing sulfide-rich...geochemical features that are diagnostic. In this type of gold mineralization, the most abundant sulfides are arsenopyrite |  | | Journal (article/letter/editorial) | | inclusions in quartz-pebbles of the gold-bearing Tarkwaian conglomerates of Ghana as guides to their provenance...Proterozoic Aubearing Tarkwaian conglomerates in Ghana reveal several original (inherited) pre-sedimentary...inclusions in quartz-vein type gold deposits of the Birimian Supergroup in Ghana and Burkina Faso. This type...inclusions has not been reported from any other lode-gold deposit of greenstone affiliation and is thus a...a specific characteristic for Birimian-hosted gold deposits. Therefore, it can be used as an unequivocal |  | | Journal (article/letter/editorial) | | Proterozoic Birimian Supergroup of Ghana and Some Aspects of its Associated Gold Mineralization ALFRED LEUBE...2Geological Survey Department, Box M80, Accra (Ghana) Abstract Leube, A., Hirdes, W., Mauer, R. and...Proterozoic Birimian Supergroup of Ghana and some aspects of its associated gold mineralization. Precambrian..._+66 Ma) form part of the West African craton. Ghana contains the eastern portion of the Birimian terrane...chemistry ), characterize the Birimian Supergroup of Ghana. The belts are separated by basins containing isoclinally |  | | Journal (article/letter/editorial) | | Paleoproterozoic Birimian manganese-formation of Nsuta/Ghana Received: 18 April 1997 / Accepted: 16 July 1998...manganese deposit of Nsuta, in the Ashanti Belt of Southern Ghana, is sandwiched between Birimian metasedimentary...sediment including Fe-bearing rhodochrosite and alabandite) is envisioned to have been formed in a marine...orebody are: sul®des (e.g. two generations of alabandite sphalerite, pyrite, millerite, niccolite, gersdorf®te...Kumasi, Ghana A. Annor Department of Geology, P. O. Box 58, University of Ghana, Legon, Accra, Ghana todorokite |  | | Journal (article/letter/editorial) | | Meinert, 1989: Hollinger-Mclntyre, ~ 995 tonnes Au; Ashanti. ~ 710 tonnes Au: Cripple Creek, - 590 tolmes Au:...(Trinity Hall ) in 1968, worked for Consolidated Gold Fields Ltd, in Cornwall. After completing a Ph.D...in quartz vein and "albitite" intrusion areas per mine level suggest that the ore fluid and dyke magma...of the characteristics of the ore fluid source region (Smith, 1992 ). (iii) Most importantly, as a test...Lode district, Nevada (1200' level, Con Virginia mine; O'Neil and Silberman, 1974), and the Emperor shoshonite |  | Cabral, Alexandre Raphael, Zeh, Armin, Viana, Nívea Cristina da Silva, de Castro, Marco Paulo, Laufek, František, Lehmann, Bernd, Queiroga, Gláucia (2019) Alabandite (MnS) in metamorphosed manganiferous rocks at Morro da Mina, Brazil: palaeoenvironmental significance. European Journal of Mineralogy, 31 (5) 973-982 doi:10.1127/ejm/2019/0031-2879 | Journal (article/letter/editorial) | | 2019, 31, 973–982 Published online 29 July 2019 Alabandite (MnS) in metamorphosed manganiferous rocks at...Clausthal-Zellerfeld, Germany Abstract: The mineral alabandite, cubic MnS with variable amounts of FeS, occurs...is Morro da Mina, Mina Gerais, Brazil, where alabandite is a minor component of “queluzite”, a manga...manganese-silicate–carbonate rock. The Morro da Mina alabandite contains 7.3 ± 1.4 mol% FeS and makes up aggregates...with graphite and molybdenite. A comparison of alabandite occurrences worldwide indicates four main types |  | | Journal (article/letter/editorial) | | sulfides. The metamorphosed formationsat Nsuta mine area, Ghana, Ti•r•, French West Africa, SimsiS, Finland...differentparts of the world, viz. Brazil, United States,Ghana,French West Africa, South West Africa, Madagascar... METAMORPHIC MANGANESE PROTORES OF THE WORLD 1243 (alabandite) and were apparentlylaid down as syngeneticoxide...thoughHoren (18) reported hausmannite from the Merid mine and interpretedits formationas a metamorphic derivative... AFRICA The manganese depositof Nsutaminearea,Ghana,hasbeeninvestigated in detailby KitsonandJunner(22) |  | | Journal (article/letter/editorial) | | Platinum-group minerals and gold in arsenic-rich ore at the Thompson mine, Thompson Nickel Belt, Manitoba...(2002): Evolution of local electronic structure in alabandite and niningerite solid solutions [(Mn,Fe)S, (Mg... M.E. (1998a): Detrital pyrite in Witwatersrand gold reefs: X-ray diffraction evidence and implications...R. & WEISENER, C.G. (1993): Arsenian pyrite from gold deposits: Au and As distribution investigated by...partitioning of platinum-group elements (PGE) and gold with application to magmatic sulfide–PGE deposits |  | Pienaar, D., Guy, B.M., Hofmann, A., Viljoen, K.S. (2015) A Geometallurgical Characterization of the Vaal Reef A-Facies at the Moab Khotsong Mine, Klerksdorp Goldfield, South Africa. South African Journal of Geology, 118 (4) 455-472 doi:10.2113/gssajg.118.4.455 | Journal (article/letter/editorial) | | KHOTSONG MINE, KLERKSDORP GOLDFIELD, SOUTH AFRICA D. PIENAAR Geosciences Department, Moab Khotsong mine, AngloGold...AngloGold Ashanti, Private Bag X 5010, Vaal River, 2621, South Africa Department of Geology, University...marked decline in the gold recovery factor of ore from the Moab Khotsong mine, treated through the Great...Reef A-facies conglomerate at the Moab Khotsong mine. This paper serves to document the results of the...Khotsong mine for mineralogical study and metallurgical tests. Laboratory scale leaching tests for gold (cyanide) |  | | Journal (article/letter/editorial) | | sphalerite occurs via cation exchange (Zn2+↔ Mn2+). Alabandite (MnS) is, however, not isostructural with sphalerite...mineral chemistry, especially the distribution of gold in the crystal lattice and as nano- to micron-sized...7 kbar; Bjerkgård et al. 2001). The presence of gold was confirmed during exploration work carried out...(Cook 2001). Deposits of the Røros region, Southeastern Trondheim region, are hosted within a Cambrian to...deposits and for uranium mineralization in the Mt. Isa region (Polito et al. 2006; Southgate et al. 2006). Mineralogy |  | | Journal (article/letter/editorial) | | field of Pliocene - Quaternary age, where active gold deposition is identified in hot spring precipitate...quartz-adularia vein of low-sulfidation type. Stage III is alabandite-rhodochrosite-quartz-calcite vein. The K-Ar ages...1). Reportedly, AngloGold Ashanti Ltd. (AGA) of the USA, Trans Siberian Gold Ltd. (TSG) of the UK and...constrains and the wilderness character of this region. During the Soviet Union era, admittance to the...Trans-Siberian PetropavlovskOkhotsk-Chukotka Kamchatsky Gold PLC, 2004). Volcanic belt Koryaksky-Western Volcanic |  | | Journal (article/letter/editorial) | | multi-process genetic hypothesis for greenstonehosted gold lodes R.W. Hutchinson Department of Geology and...multi-process genetic hypothesis for greenstone-hosted gold lodes. In: S.J. Haynes (Editor), Vein-type Ore Deposits...the geology and geochemistry of greenstone-hosted gold lodes have emerged during the worldwide, intensive...reduced conditions of Archean time. They leached gold, silica, carbonate and other components of the ores...This accounts for the widespread low, but anomalous gold content of Algoma type iron-formations and for the |  | | Journal (article/letter/editorial) | | Lower Proterozoic Nsuta manganese deposit, Western Ghana, contains abundant inclusions of micritic and microconcretionary...Department of Geology, University of Ghana, P.O. Box 58, Legon-Accra, Ghana e-mail: fnyame@hotmail.com Tel...manganese deposit The manganese deposit at Nsuta, Ghana, is located within the Lower Proterozoic (2.2 Ga)...granoblastic rhodochrosite, occasionally accompanied by alabandite, molybdenite, sphalerite, alleghanyite, jacobsite...Geological map of the Nsuta manganese deposit, Ghana (modi®ed from Ghana Manganese Company records) appears the |  | | Catalog/List | | Pyroxene AEGIRINE Pyroxene AKAGANEITE FeO OHCI ALABANDITE Mn S ALAMOSITE Pb SiO/3 ALBITE Feldspar ALLANITE... x i £5 Rich wh ite crusts on matrix. Rawhide Mine, Moh ave County, ½ x ½ Arizona, U.S.A £3 Kragero...Bastnas Mine Sweden Jx2 £6 2 x2 £1.20 2x2 £1 2 Ix ! £4 l x2 £8 New East Wheal Russell mine, Devon...£ 16 2x3 £25 l x l £3 San Jose Mine, Oruro, Bolivia Benallt Mine,Lleyn ,Wales l x2 £1.5 0 6x6mm £3... Rich fawn sheaves in silvery schist Kaveltorp Mine Sweden Jx2 £ I l.x2 £2.5 0 l x2 £1.20 2x2 £2 |  | | Catalog/List | | black-brown cleavage Yakutia. Russin 5mm£2 Rawhide Mine, MohavcCounty, ½xY,£3 Arizona , US.A . l.x2 50p...matrix. 34 AEGIRINE 10 AENI GMATITE 15 ALABANDITE 255 ALAMOSITE Rich white crusts on matrix...group AlS0/4 Al S0/4 ✓ New East Whcal Russell mine, Devon .England Madagascar Railway cutting nearCreston...in Porphyl)·. Pure grey metallic mass San Jose Mine. Oruro, Bolivia 6x6mm £3 23 ANHYDRITE Rich white...Variety Francolitc.rich mass of micro ✓ Holmbush Mine. Kelly Bray . Cornwall crystals over the main surface |  | | Catalog/List | | Two new Gold locations and Copper after Aragonite. Metallic minerals , Arsenopyrite Ghana, Ilmenite...South Africa,Cobaltian Gersdorffite from Gortdmm Mine Containing unusual elements , Iquiqueite,Galkhaite...Fe Ti SiO in matrix Pure black-brown clcnvagc ALABANDITE Yakutio.Russia 5mm£2 Mn S _ _ -_½_ _ _ - 3___...grey masses with possible Als1oni1e Fallowficld mine. Ix½ £4 Ba Ca C0/3 micros. Hexham.Nonhumbcrlond..._ _ __ ___ _____ _ _ _ _ 21 7 ANDORITE San Jose Mine, Oruro. Bol ivia 6x6mm £3 Pure grey metallic mass |  | | Book | | Kuopio, Finland P. Heino Yara Suomi Oy, Siilinjärvi Mine, Siilinjärvi, Finland R.J. Herrington The Natural...US T. Huhtelin QP-FRB Outokumpu Ferrochrome Kemi Mine, Kemi, Finland E. Hyvönen Geological Survey of Finland...Survey of Finland, Rovaniemi, Finland, Mustavaara Mine Ltd, Oulu, Finland J. Kinnunen Mawson Resources...Oulu, Finland Contributors T. Mäki Pyhäsalmi Mine Oy, Pyhäsalmi, Finland H.V. Makkonen Geological...Taipale Palsatech Oy, Rovaniemi, Finland Mustavaara Mine Ltd, Oulu, Finland, Finland O.T. Rämö University |  | | Book | | GOLD Top: The original Turin Papyrus of the Egyptian gold mine (circa 1320 B.C.), the oldest geological...Papyrus of the Egyptian gold mine (after Ball, 1942; see chapter 3). GOLD History and Genesis of Deposits...deposits. Includes bibliographies and index. 1. Gold ores. 2. Gold. I. Title. TN420.B63 1987 553.4'1 86-15675...GENERAL GEOCHEMISTRY OF GOLD AND TYPES OF AURIFEROUS DEPOSITS General Geochemistry of Gold / 11 Auriferous Deposits...CHAPTER 2: GOLD DURING THE PRE·CLASSICAL (PRIMITIVE) PERIOD (5000 o.c.-600 o.c.) . 23 Gold Deposits in |  | | Book | | important but complex issue of the social license to mine. The final chapter provides a lively discussion of.... . . . . . . . . . . . . . . . . . . . . 5.2.1 Gold Placers . . . . . . . . . . . . . . . . . . . ....the Global Mineral Market The Social Licence to Mine. . . . . . . . . . . . . . . . . . 6.8.1 Pebble...turn of the last century it was only possible to mine deposits with high grades that were close to the...utilisation of modern techniques, it is possible now to mine ore with as little as 0.5 % Cu. And with the economy |  | | Report (issue) | | Supergroup in South Africa that contains Earth’s largest gold-uranium deposits. These deposits are hosted by quartz-pebble...paper, Minter shows that the sedimentary setting of gold, pyrite, and uraninite favors a detrital origin...geologic and geochemical features indicating that the gold, uranium, and sulfur were deposited by hydrothermal...conglomerates that host only uraninite and pyrite, but no gold. In the final paper, Gauthier-Lafaye shows that................105 W.E.L. Minter 7. Witwatersrand gold-pyrite-uraninite deposits do not support a reducing |  | Finch, John Wellington, Bateman, Alan M., Butler, B. S., Loughlin, G. F., McLaughlin, D. H., Singewald, J. T. Jr. - Eds. (1933) Ore Deposits of the Western States. The American Institute of Mining and Metallurgical Engineers, New York. | Book | | the metalliferous wealth of the Rocky }\fountain region. As a Government geologist for more than a quarter...research "of especial interest to the Rocky :Mountain region." This use of income derived from the assets of...western development. Coming to the Rocky Mountain region as a young man, fresh from the schools of a country...plan. After consideration of many alternatives a project for a Lindgren volume on ore deposits was formulated...foundation should deal with the ore deposits o:f the region in which Lindgren did much o.f his early work and |  | | Book | | siderable height above the Earth’s surface—the region of delay (Krinov, 1961). Below this point, the...Plowever, the meteorite passes rapidly through this region and below the point where it has completely lost... Suess (1937) Kofels, Austria *Lake Bosumtwi, Ghana Merewether, Labrador, Canada 10,000 150 Meen (1957)...Study of Table 3 shows that within a specific region the recognition and recovery of meteorites depends...of only 6 meteorites from the whole of China, a region certainly comparable to India and Pakistan in respect |  | | Journal (article/letter/editorial) | | Earth-Science Reviews 100 (2010) 1–420 by a pilot project on mineral deposits in Central Europe and in the.... . . . . . . . . . . . . . . . . . . . . . . . Gold. . . . . . . . . . . . . . . . . . . . . . . . ...and mineralogy of gold . . . . . . . . . . . . . . . . . . . . . . . 20.2. Magmatic gold deposits . . .... Structure-bound gold deposits . . . . . . . . . . . . . . . 20.4. Sedimentary gold deposits . . . .... . 20.5. Metamorphic gold deposits . . . . . . . . . . . . . . . . . 20.6. Gold supply and use . . . | | | Journal (article/letter/editorial) | | Earth-Science Reviews 100 (2010) 1–420 by a pilot project on mineral deposits in Central Europe and in the.... . . . . . . . . . . . . . . . . . . . . . . . Gold. . . . . . . . . . . . . . . . . . . . . . . . ...and mineralogy of gold . . . . . . . . . . . . . . . . . . . . . . . 20.2. Magmatic gold deposits . . .... Structure-bound gold deposits . . . . . . . . . . . . . . . 20.4. Sedimentary gold deposits . . . .... . 20.5. Metamorphic gold deposits . . . . . . . . . . . . . . . . . 20.6. Gold supply and use . . . |
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