 | Mil�si, J.P., Ledru, P., Ankrah, P., Johan, V., Marcoux, E., Vinchon, Ch. (1991) The metallogenic relationship between Birimian and Tarkwaian gold deposits in Ghana. Mineralium Deposita, 26 (3) doi:10.1007/bf00209263 | Journal (article/letter/editorial) | | relationship between BMmian and Tarkwaian gold deposits in Ghana J.P. Mil~si 1, p. Ledru 1, p. Ankrah z...GeologicalSurvey Department, PO Box M. 80, Accra, Ghana Received: November 14, 1989/Accepted: December 12...traditional concept of the Early Proterozoic gold deposits in Ghana i.e. gold-bearing shear zones overlain by Tarkwaian...Tarkwaian paleoplacers containing reworked gold derived from the shear-zones - needs to be reconsidered...reconsidered in the light of recent research in Ghana, the Ivory Coast and French Guiana. This research has revealed |  | Pigois, Jon-Philippe, Groves, David I., Fletcher, Ian R., McNaughton, Neal J., Snee, Lawrence W. (2003) Age constraints on Tarkwaian palaeoplacer and lode-gold formation in the Tarkwa-Damang district, SW Ghana. Mineralium Deposita, 38 (6) 695-714 doi:10.1007/s00126-003-0360-5 | Journal (article/letter/editorial) | | Tarkwaian palaeoplacer and lode-gold formation in the Tarkwa-Damang district, SW Ghana Received: 17 June 2002...epigenetic gold-forming events are recorded in the world-class gold province of southwest Ghana. A pre-Tarkwaian...pre-Tarkwaian event was the source of the world-class Tarkwa palaeoplacers whereas post-Birimian and Tarkwaian...world-class (e.g. Prestea) to giant (e.g. Obuasi) orogenic gold deposits which have made the region famous for more...clastic rocks from Damang and Bippo Bin, northeast of Tarkwa. The overall data distribution broadly overlaps |  | | 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) | | Fluid Source for Orogenic Gold Mineralization at the Damang Deposit, Ghana Alistair J.R. White,1,2,†...Abstract Gold mineralization at the Damang deposit is unique among currently known orogenic gold deposits...deposits in Ghana, comprising gold hosted within metasediments of the Tarkwaian System and contained in a subhorizontal...metamorphic, igneous, and metasomatic events. Orogenic gold mineralization occurred late in the geologic paragenesis...fluids and the host rock resulted in precipitation of gold in association with sulfide-carbonate-potassic alteration |  | | Journal (article/letter/editorial) | | Source of Early Proterozoic Lode Gold Deposits of the Birimian Volcanic Belt, West Africa a a Reiner Klemd...Source of Early Proterozoic Lode Gold Deposits of the Birimian Volcanic Belt, West Africa, International Geology...Source of Early Proterozoic Lode Gold Deposits of the Birimian Volcanic Belt, West Africa REINER KLEMD, U...17:41 19 April 2015 Gold-bearing veins of Early Proterozoic lode gold deposits of Ghana and Burkina Faso...to 1.15 g/cm 3 ), in contrast to most other lode gold deposits of greenstone affiliation. Mineral modeling |  | Perrouty, Stéphane, Jessell, Mark W., Bourassa, Yan, Miller, John, Apau, Daniel, Parra-Avila, Luis A., Le Mignot, Élodie, Velásquez, Germán, Ganne, Jérôme, Siebenaller, Luc, Baratoux, Lenka, Aillères, Laurent, André-Mayer, Anne-Sylvie, Béziat, Didier, Salvi, Stefano (2016) Geological setting of the Wassa gold deposit, SW Ghana. Ore Geology Reviews, 78. 687-691 doi:10.1016/j.oregeorev.2015.09.024 | Journal (article/letter/editorial) | | com/locate/oregeorev Geological setting of the Wassa gold deposit, SW Ghana Stéphane Perrouty a,f,⁎, Mark W. Jessell...earlyorogenic gold deposit located on the eastern flank of the Ashanti Belt, in southwest Ghana. It is hosted...host rocks, and by deformed gold-bearing pyrite. Remobilization of this gold occurred during the late stages...associated with quartz-carbonate veins with visible gold and euhedral pyrites. © 2015 Elsevier B.V. All rights...(Moz) low-grade orogenic gold system. Historical production is over 1 Moz of gold and current indicated |  | | Journal (article/letter/editorial) | | and provenance of Birimian and gold-bearing Tarkwaian sediments in Ghana, West Africa D . W . D a v i s...Strasbourg, France dTGL, State Gold Mining Corporation, Accra, Ghana Received November 16, 1992; revised...Eburnean rocks of Ghana. Gold-bearing and barren Tarkwaian conglomerates in the Tarkwa basin, and a volcanogenic...synvolcanic granitoid plutons in the Sefwi and Ashanti belts, which flank the Kumasi basin. This suggests...are typical of the region. Significant epigenetic gold mineralization probably began in the short time |  | Le Mignot, Elodie, Reisberg, Laurie, André-Mayer, Anne-Sylvie, Bourassa, Yan, Fontaine, Arnaud, Miller, John (2017) Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton. Economic Geology, 112 (1) 145-168 doi:10.2113/econgeo.112.1.145 | Journal (article/letter/editorial) | | Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton Elodie...Archean-Proterozoic craton of West Africa hosts numerous gold deposits, which are spatially and temporally related...multiple deformation events. The majority of these gold deposits are located along shear zones. The structural...history is relatively well established for most gold deposits, but absolute timing of the mineralization...of gold events: Nassara and Kiaka in Burkina Faso and Wassa, Damang, and Obuasi in southern Ghana. Gold |  | | Journal (article/letter/editorial) | | and hydrothermal alteration at the Damang gold deposit, Ghana A. J. R. WHITE,1,2 D. J. WATERS1 AND L. J...white@csiro.au) ABSTRACT Orogenic gold mineralization at the Damang deposit, Ghana, is associated with hydrothermal...hydrothermal alteration haloes around gold-bearing quartz veins, produced by the infiltration of a H2O–CO2–K2O–H2S...conditions of regional metamorphism and the subsequent gold mineralization event. Metapelites with well-developed...hydrothermal alteration assemblages associated with gold mineralization in a wide compositional range of |  | | Book | | Ver' "\ ~~ • THE MINERAL AND ROCK RESOURCES OF GHANA f btYON RALPH Dedicated to my parellfs for not...ISBN 90 6191 597 X paper edition only for sale in Ghana © 1985 A.A.Balkema, P.O.Box I 675, 3000 BR Rotterdam...REPUBLIC OF GHANA- GEOGRAPHY,PHYSIOGRAPHY,GEOLOGY AND GEOHYDROLOGY 6 3. THE MINERALRESOURCESOF GHANA - BACKGROUND...EXPLOITATION IN GHANA 572 12. TABLES OF SUMMARY OF MINERAL AND ROCK RESOURCESOF GHANA 577 13. LEGISLATION...590 APPENDIX 597 INDEX 602 V Preface The Ghana Geological SuJ;"vey DepaJ;"tment in 1.962, published |  | | Journal (article/letter/editorial) | | West Africa: The World’s Premier Paleoproterozoic Gold Province* Richard J. Goldfarb,1, 2,† Anne-Sylvie...approximate 10,000-metric ton (t) gold endowment, is one of the world’s great gold provinces and the largest...largest Paleoproterozoic gold-producing region. The gold resources are concentrated within the 2250 to 2000...major orebodies are best classified as orogenic gold deposit types, although there are paleoplacer and...belts, and perhaps local intrusionrelated gold systems. The gold-hosting, mainly greenschist metamorphic |  | | Journal (article/letter/editorial) | | formed 26 between ca. 2.5 - 2.3 Ga, nearly all gold, porphyry copper, lead-zinc and sedimentary 27...distinguished by major Precambrian 30 IOCG’s, copper-gold that formed at ca. 2.1 Ga and approx. 680 Ma, and... Mineral Deposit Database highlight that gold and non-gold commodities formed in multiple 37 phases...of iron 38 ore, nickel sulphides, diamonds and gold in the earth’s crust. The pre-Eburnean or Tangaean-...EoEburnean-Eburnean I Event yielded gold, and the major Eburnean Orogeny yielded gold, 40 iron ore, manganese |  | | Journal (article/letter/editorial) | | geology, metallogenesis and prospectivity of several gold deposits from the Archaean and Palaeoproterozoic...portfolio of the West African craton and contextualize gold, iron-oxide coppergold, iron ore, aluminium, diamond...Markwitz et al., 2015). Unfortunately many of the non-gold mineral occurrences/deposits, their exploration...Milési et al., 1989; Béziat et al., 2008 on regional gold metallogenesis; Nyame et al., 2002; Beauvais et...that the majority of contributions present data for gold deposits (Neoarchean to Paleoproterozoic). However |  | 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) | | com/locate/oregeorev The Jacobina Paleoproterozoic gold-bearing conglomerates, Bahia, Brazil: a ‘‘hydrothermal...widespread alteration with gold-bearing quartz lodes, conglomerates showing a sulphide – gold – Cr – mineral association... Such a model, which implies the existence of a gold preconcentration within the quartz – pebble conglomerates...zones for postsedimentary mesothermal quartz – tourmaline – muscovite/fuchsite lodes, which constitute...magnetite and responsible for the high concentration of gold within shear veins containing assemblages of Cr |  | Dai, Xiongxin, Boamah, Daniel, Koeberl, Christian, Reimold, Wolf Uwe, Irvine, Gordon, McDonald, Iain (2005) Bosumtwi impact structure, Ghana: Geochemistry of impactites and target rocks, and search for a meteoritic component. Meteoritics & Planetary Science, 40 (9) 1493-1511 doi:10.1111/j.1945-5100.2005.tb00414.x | Journal (article/letter/editorial) | | http://meteoritics.org Bosumtwi impact structure, Ghana: Geochemistry of impactites and target rocks, and...and environs of the Bosumtwi impact structure, Ghana, have been investigated for the possible presence...contents are high and possibly related to regional gold mineralization, although mineralized samples from...centered at 06°30′N and 01°25′W Bosumtwi crater in Ghana is a wellpreserved, complex impact structure. It...Geographic location of the Bosumtwi impact crater, Ghana, in relation to the Ivory Coast tektite strewn field |  | | Journal (article/letter/editorial) | | content of fluid inclusions in gold mineralisations in the Ashanti Belt, Ghana: a new category of ore forming...samples from the Ashanti, Konongo-Southern Cross, Prestea, Abosso/ Damang and Ayanfuri gold deposits in the...the Ashanti Belt, Ghana. Primary fluid inclusions in quartz from mineralised veins of the Ashanti, Prestea...mineralisation. Here inclusions associated with the gold mineralisation contain a low salinity (<6 eq.wt...the gaseous inclusions of 0.65 to 1.06 g/cm3 at Ashanti, 0.85 to 0.98 g/cm3 at Prestea, up to 1.02 g/cm3 |  | Lebrun, Erwann, Thébaud, Nicolas, Miller, John, Roberts, Malcolm, Evans, Noreen (2017) Mineralisation footprints and regional timing of the world-class Siguiri orogenic gold district (Guinea, West Africa) Mineralium Deposita, 52 (4) 539-564 doi:10.1007/s00126-016-0684-6 | Journal (article/letter/editorial) | | regional timing of the world-class Siguiri orogenic gold district (Guinea, West Africa) Erwann Lebrun 1 Noreen...world-class orogenic gold district hosted in the weakly metamorphosed Upper Birimian to Lower Tarkwa Group sedimentary...Perth, WA 6845, Australia vein set contains high gold contents of up to 43.3 ppm, in substitution in pyrite...pyrite crystal lattice, representing a minor first gold mineralisation event. The third and most prominently...late D3S and represents the second and principal gold mineralisation event. This mineralisation event |  | | Journal (issue) | | properties. Precious stone cutters: opel - amethyst - tourmaline - aquamarine citrine - precious topaz. Manufacturer...BRAZILIAN MINERALS WHOLESALE ONLY. MODERN SETTINGS IN GOLD AND SILVER AT TRADE PRICES the handmade jewellery...Carson Ritchie 28 32 Gems & Minerals Traditional Gold Industries in West Africa by David Baldry, D.Sc...O'Donoghue. 5 TRADITIONAL GOLD INDUSTRIES IN WEST AFRICA Part I. Gold deposits and their historical...African gold the thoughts of one's audience invariably turn to the Witwatersrand field, where gold was discovered |  | | Journal (article/letter/editorial) | | and the ages reported for the Tarkwaian rocks of Ghana. The same period of accretion is also recognized...of Burkina Faso do not have gold concentrations similar to those in Ghana and Guyana. With respect to...to the Tarkwaian rocks of Ghana, where gold is concentrated in the quartz pebbles, they also differ because:...concentration of gold. These differences, at least, may help explain the lack of economic gold concentration...Radiometric data indicate that in West Africa (Ghana, Burkina Faso, Ivory Coast, Mali, Senegal) these |  | Dabo, Moussa, Aïfa, Tahar, Miyouna, Timothée, Abdoul Diallo, Diery (2016) Gold mineralization paragenesis to tectonic structures in the Birimian of the eastern Dialé-Daléma Supergroup, Kédougou-Kéniéba Inlier, Senegal, West African Craton. International Geology Review, 58 (7) 807-825 doi:10.1080/00206814.2015.1123121 | Journal (article/letter/editorial) | | homepage: http://www.tandfonline.com/loi/tigr20 Gold mineralization paragenesis to tectonic structures... Timothée Miyouna & Diery Abdoul Diallo (2015): Gold mineralization paragenesis to tectonic structures...doi.org/10.1080/00206814.2015.1123121 ARTICLE Gold mineralization paragenesis to tectonic structures...the KédougouKéniéba inlier indicate two phases of gold mineralization related to Eburnean tectono-magmatic...mainly composed of quartz + chlorite + pyrite and ± gold. Haematite and arsenopyrite are added in the sediments |  | | Journal (article/letter/editorial) | | the Prestea Mesothermal Vein Gold Deposit in the Birimian System of Ghana a Napoleon Q. Hammond & Hidehiko...the Prestea Mesothermal Vein Gold Deposit in the Birimian System of Ghana, International Geology Review...the Prestea Mesothermal Vein Gold Deposit in the Birimian System of Ghana NAPOLEON Q. HAMMOND AND HIDEHIKO...Prestea lode gold deposit occurs in a graphitic shear zone in the Birimian system of Ghana. The Birimian...Proterozoic greenstone assemblage (**« 2100 Ma) with large gold deposits, consisting of a lower unit predominantly |  | 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) | | MoÃnaco ConceicËaÄo Filho á Sundaram S.S. Iyer Gold mineralization in the Serra de Jacobina region,...Abstract Gold deposits in the Serra de Jacobina region in Bahia, northeastern Brazil, occur in a belt of siliciclastic...ed hydrothermal orebodies, and the formation of gold occurrences also in quartzites and ma®c and ultrama®c...an epigenetic model for the mineralizing event. Gold mineralization is interpreted to be an integral...craton along a main orogenic belt termed the Salvador±CuracËa mobile belt (Marinho and Sabate 1982; Cordani |  | | Journal (article/letter/editorial) | | andauriferousquartz-pebble conglomerates, gold-bearingconglomerates of the Tarkwaianin Ghana,and red-bedsediments,yield...to haveactivelycontrolled(buff- theTarkwaianin Ghana,havepreviously beenrecog- ered)environmental conditions...onglomerates, and continentalred-bedsediments. Gold- and Uranium-bearing, Pyritic Quartz-PebbleConglomerates...goldplacersdevelopedon fluvialfansor fan deltas, Pyritic gold- and/oruranium-bearing quartz-peb- mainlyalongthe...grainsare characterizedby and ates(Barberton greenstone belt) ca.3.'25Ga (Saager, roundedshapes,abradedsurfacemorphologies |  | | Journal (article/letter/editorial) | | 143-159 Palaeoproterozoic gold mineralization of the Et6k6 Archaean greenstone belt (Gabon)" its relation...revised version accepted 19 July 1995 Abstract The gold deposits of the Et6k6 district (Gabon) are hosted...Et6k6 Archaean unit (2940 + 6 Ma), a greenstone belt within the folded and metamorphosed Ogoou6 domain...Palaeoproterozoic Francevillian foreland basin deposits. The gold is contained in quartz + carbonate stockworks, 'hydrothermalite'...deformation) in the outer (foreland) zone of the orogenic belt, would have received the repercussions of crustal |  | | Journal (article/letter/editorial) | | ilmenite, rutile, monazite, staurolite, kyanite, tourmaline, apatite, sphene, magnetite, garnet, chromite...monazite, anatase, rutile, garnet, sphene, apatite, tourmaline, pyrite, chalcopyrite, galena, molybdenite, sphalerite...include rutile, zircon, anatase, garnet,. sphene, tourmaline, pyrite, chalcopyrite, galena, apatite, ilmernte...tlmenite, zircon, rutile, garnet, sphene, apatite, tourmaline, . hematite, pyrite, chalcopyrite, cubanite,...widely in composition of cement Maximum content of gold' . Up to 1 - 553 g/ton No more than 0.06 , |
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