Request PDF | On Jul 1, 2015, Denis Fougerouse and others published The Obuasi gold deposit, Ghana: A West African giant | Find, read and cite all the research you need on
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Effisah-Otoo University of Mines and Technology, P.O. Box 237, Tarkwa, Ghana 2 Golden Star Bogoso/Prestea Ltd, Bogoso 1 1 Tetteh, G. M. and Effisah-Otoo, E. (2017), “Petrography and Geochemistry of some Granitoids associated with Gold Mineralisation at
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· The Golden Pride gold deposit (∼3 Moz) is located in the central part of the Nzega Greenstone Belt at the southern margin of the Lake Victoria Goldfields in Tanzania. It represents an inferred Late Archaean, orogenic gold deposit and is hosted in intensely deformed meta-sedimentary rocks in the hanging wall of the approximately E–W striking
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Uses of Arsenopyrite and Arsenic. Arsenopyrite is the primary ore of arsenic metal. The mineral contains approximately 46% arsenic by weight. Arsenic metal is used to produce a variety of alloys. It was historically used to harden lead in ammunition, but this use was nearly eliminated by the late 1900s.
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· Laser ablation-ICP-MS data show that this vein set contains high gold contents of up to 43.3 ppm, in substitution in pyrite crystal lattice, representing a minor first gold mineralisation event.
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Gold mineralisation, Ashanti belt, Ghana 123 the mean δ34S of pyrite from Birimian sediments (ca. -7 per mil CDT) and of arsenopyrite from gold mineralisa-tion closely match each other (Fig. 4). Pb isotope analyses of arsenopyrite concentrates (Ashanti Mine
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In Ghana, gold is found in the Lower Proterozoic Birimian and Tarkwaian supracrustal rocks of the West Africa craton (Dzigbodi-Adjimah, 1993). International Journal of Geology, Earth & Environmental Sciences ISSN: 2277-2081 (Online)
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documented Obuasi gold deposit (Ghana), where gold-bearing arsenopyrite mineralisation in metasedimentary rocks is adjacent to visible gold mineralisation in quartz veins (Oberthür et al. 1994;
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Communs geol. Surv. Namibia, 10 (1995), 121-127 A review of gold mineralisation in the Ashanti belt of Ghana and its relation to the crustal evolution of the terrane T. Oberthür1, W. Hirdes1, A. Höhndorf1, A. Schmidt Mumm1, U. Vetter1, T. Weiser1, D. W. Davis2
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· Central Ashanti gold mine is located approximately 57km south-west of Obuasi and 195km north-west of Ghana’s capital Accra. Formerly known as the Ayanfuri gold project, the mine produced in excess of 300,000oz of gold between 1994 and 2001. It is owned by Central Ashanti Gold Limited, a wholly owned subsidiary of Perseus, which
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:Quartz Veinssteven micklethwaiteGold mineralization in As-rich mesothermal gold ores of the Bogosu-Prestea mining district of the Ashanti Gold Belt, Ghana: remobilization of “invisible”
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granite–greenstone terrane which hosts significant gold mineralisation in Ghana and Burkina Faso. Based upon structural observations, the timing of gold mineralisation is late in the first phase of deformation after all host lithologies were in place. The deposit
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There is a close association between sulphide minerals, especially arsenopyrite, and gold in most parts of Ghana (Dzigbodi-Adjimah, 1993; Smedley, 1996). The problems associ-ated with AMD can therefore be expected in many gold mining areas in Ghana.
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· At the Deep Star gold deposit, Carlin Trend, Nevada, the sulfide compositions apparently span the full range of metastability from FeS 2 to near FeAsS (40 at% S); arsenian pyrite contains up to 0.37 wt% Au, but
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Gold mineralisation at Edikan occurs principally in the granite bodies, but also in classic “Ashanti-style” sediment hosted shear zones. The granite hosted gold mineralisation is free milling and occurs in two to three generations of abundant, narrow quartz veining associated with up to 3% pyrite, lesser arsenopyrite and traces of sphalerite,
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Edikan Gold Mine is a large-scale, low-grade multi open-pit operation located in the Central Region of Ghana. The Nkosuo deposit is located approximately 7 kilometres north-northwest of the Edikan Gold Mine in Ghana and added substantial Mineral Resources and Ore Reserves to Edikan at 30 June 2022. Early in FY23, Perseus Mining announced the
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:Publish Year:2016In the Obuasi deposit, two distinct styles of gold mineralisation occur; (1) goldbearing sul- phides, dominantly arsenopyrite, disseminated in metasedimentary rocks and (2) native
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Res., 67, 89-107. Eisenlohr, B.N. 1989. The structural geology of Birimian and Tarkwaian rocks in Ghana. BGR Rep. No. 106 448, 66 pp. Eisenlohr, B.N. 1992. Conflicting evidence on the timing of mesothermal and palaeoplacer gold mineralisation in early
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· Two major orogenic events have been identified in the Birimian in Ghana. The Eburnean I orogeny or Eoeburnean (2200-2135 Ma) was associated with the eruption of mafic volcanic rocks, metamorphism
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31 GMJVol. 17, No. 1, June, 2017 Petrography and Geochemistry of some Granitoids associated with Gold Mineralisation at Mpohor area in southeastern Ashanti Belt of the Birimian, Ghana* 1G. M. Tetteh and 2E. Effisah-Otoo 1University of Mines and Technology, P.O. Box 237, Tarkwa, Ghana
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However, gold-rich telluride mineralization in veins in the hangingwall of the Obuasi ore zone at Ashanti appears to have post-dated development of the major gold-bearing shear zone. Complex assemblages of goethite, chalcocite, coloradoite, calaverite, sylvanite, kostovite, petzite, stutzite, hessite, altaite, rickardite, weissite and henryite
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· Granitoid-hosted gold deposits represent an economically significant style of gold mineralization in the Birimian granite-greenstone belts of southern Ghana (Fig. 1).Examples include the Subika and Chirano gold deposits in the Sefwi Belt (e.g., Allibone et al. 2004; Baah-Danso 2011); the Nhyiaso, Ayankyerim, and Edikan gold deposits in
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· Orogenic gold deposits that formed during this period may include the later mineralising event at the Obuasi deposit (Fougerouse et al. 2017;Oliver et al. 2020), gold mineralisation at the major
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· This suggests a uniqueness of the gold mineralisation of the Abansuoso deposit which differs from similar deposits within the Birimian of Ghana. From the factor analysis, PCA1 has elemental associations of heavy elements characteristic of the mafic minerals associated with the gneisses in the study area.
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· The Au mineralization in the Kubi Gold Mining Area in the Birimian of Ghana is associated with garnet (about 85 vol.%), magnetite, pyrrhotite, arsenopyrite, and sulfide minerals, as well as quartz with gold and calcite. These minerals and the included elements can act as indicator minerals or pathfinder elements. For the present work, we
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parameters. The Ashanti Gold Belt is by far the most important gold-bearing structure of the Early Proterozoic (2.3-2.0Ga) Birimian rocks of West Africa (Fig. 1). The Birimian covers a large area of southern West Africa, including parts of
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There are two distinct gold mineralization styles; 1. sub-microscopic gold contained within arsenopyrite and, less commonly, in pyrite, 2. visible gold contained within micro-factures, hosted in quartz veins as much as 4-m
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Petrography and Geochemistry of some Granitoids associated with Gold Mineralisation at Mpohor area in southeastern Ashanti Belt of the Birimian, Ghana*1G. M. Tetteh and 2E. Effisah-Otoo 1University of Mines and Technology, P.O. Box 237, Tarkwa, Ghana 2Golden Star Bogoso/Prestea Ltd, BogosoTarkwa
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Uses of Arsenopyrite and Arsenic. Arsenopyrite is the primary ore of arsenic metal. The mineral contains approximately 46% arsenic by weight. Arsenic metal is used to produce a variety of alloys. It was historically
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· Here Au mineralization is developed as free gold in the matrix of the conglomerates. This style of mineralization is interpreted by Sestini, 1973, Hirdes and Nunoo, 1994 and this paper to be paleoplacer in origin and makes up approximately 20% of the total resource at Damang. The other style of Au mineralization is found in close
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