 | Le Mignot, Elodie, Reisberg, Laurie, AndrĂ©-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) | | distribution of gold in quartz veins and sulfide ores of the Ashanti mine and other deposits in the Ashanti belt...belt of Ghana: genetic implications Received: 28 September 1995 / Accepted: 11 June 1996 Abstract The Ashanti...belt of Ghana constitutes a gold province which has produced a total of about 1500 t of gold historically...historically. Gold mineralization is found in steep, NNE-SSW to NE-SW trending shear zones predominantly transecting...Ma), and in recent placers. The distribution of gold, its chemistry, paragenesis and mineralogical siting |  | | Journal (article/letter/editorial) | | Supergene gold mineralogy at Ashanti, Ghana" Implications for the supergene behaviour of gold R. J. BOWELL*...Southampton SO9 5NH Abstract A t the Ashanti concession, Ghana, gold-bearing quartz veins and disseminated...hypogene ore zone. In the unweathered hypogene orebody, gold occurs as free grains in quartz, as sub-microscopic...disseminated arsenopyrite, as gold tellurides and as aurostibite. The gold is released from the hypogene...complexing. Dissolution and reprecipitation of the gold appears to have taken place largely in situ with |  | | Journal (article/letter/editorial) | | Mineralogy and Mineral Chemistry of the Ashanti Gold Deposit at Obuasi, Ghana Shiloh OSAE*, Katsuo KASE** and...Abstract: The gold deposit at Ashanti occurs in the Proterozoic Birimian formation of Ghana. Two main ore...types mined from the deposit are gold-bearing quartz veins, and gold-sulfide disseminations in metasediments...metavolcanics. The main sulfide minerals in the gold-sulfide disseminated ores are arsenopyrite, pyrite...arsenopyrite commonly occur in small amounts, but gold mostly occurs in contact with tetrahedrite, chalcopyrite |  | | 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) | | Acknowledgements This work forms part of the research project [No. 24 (6P-24)/94-STP II/ES] funded by the Department...published data. Some of the stoichiometries of the gold complexes given in the Tables may not actually exist...probable species. The most stable stoichiometries for gold complexes in natural systems are likely to be of...Seward, 1993). Such complexes will dominate aqueous gold geochemistry, as shown by Colin et aL (1993) for... In the initial table the stability constant of gold fulvate was incorrectly reported as the equilibrium |  | | Journal (article/letter/editorial) | | Andrade,W.O., andRose,A.W., 1992, Interactionsof gold(III) chlorideandelementalgoldwith peat-derivedh...and Baranova,N.N., 1984, The geochemical role of gold (III) fulvatecomplexes: Geochemistry In- CosmochimiaActa...V.B., Schumm,R.H., Halow, I., Schmid,G.M., 1985, Gold, in Bard, A.J., Parsons,R., and Jordan,J., Bailey...Bjerrum, J., 1974, Studieson gold complexes.II. THE MOBILITY OF GOLD IN TROPICAL RAIN FOREST SOILS--A...internallyconsistentset of thermodynamicdata for gold I and gold III rolite interface. Yet this does not relate |  | | Journal (article/letter/editorial) | | G. Ryan Invisible gold in ore and mineral concentrates from the Hillgrove gold-antimony deposits, NSW...Vein-hosted mesothermal stibnite-gold mineralisation at the Hillgrove Au-Sb mine in northeastern New South Wales...50±55% of the gold produced at Hillgrove occurs invisibly in arsenopyrite and pyrite. Gold losses of 20%...little invisible gold, but minor Fe, As, Ag, Cu and Pb. The precipitation of invisible gold in arsenopyrite...stage of stibnite and gold deposition. Introduction Gold-bearing ores contain gold hosted in various mineralogical |  | | Journal (article/letter/editorial) | | zoning of sulïŹdes and quartz at Sheba and Fairview gold mines: Clues to Mesoarchean mineralisation in the...Available online 30 August 2013 Keywords: Mesothermal gold Pyrite Arsenopyrite Archean Barberton Greenstone...The Fairview and Sheba mines are two of the major gold mines in the Paleoarchean Barberton Greenstone Belt...mines, gold is associated with quartzâcarbonate ± rutile veins and occurs both as âinvisibleâ gold ïŹnely...(primarily pyrite and arsenopyrite), and as visible electrum grains hosted in pyrite. Up to approximately 1000 |  | Neyedley, Kevin, Hanley, Jacob J., Fayek, Mostafa, Kontak, Daniel J. (2017) Textural, Fluid Inclusion, and Stable Oxygen Isotope Constraints on Vein Formation and Gold Precipitation at the 007 Deposit, Rice Lake Greenstone Belt, Bissett, Manitoba, Canada. Economic Geology, 112 (3) 629-660 doi:10.2113/econgeo.112.3.629 | Journal (article/letter/editorial) | | Oxygen Isotope Constraints on Vein Formation and Gold Precipitation at the 007 Deposit, Rice Lake Greenstone...Sudbury, Ontario, Canada P3E 2C6 Abstract The 007 gold deposit is located within the 2.99â2.70 Ga Rice...dissolution-reprecipitation, respectively. Deposition of electrum (65â86 at. % Au) postdated Q1 formation and was...was broadly syngenetic with Q2 formation. Electrum occurs in two forms: (1) along sutured (healed, recrystallized)...inclusions were trapped during the growth of Q1 (prior to gold deposition), the common occurrence of texturally |  | Masurel, Quentin, ThĂ©baud, Nicolas, Miller, John, Ulrich, Stanislav, Roberts, Malcolm Peter, BĂ©ziat, Didier (2017) The Alamoutala Carbonate-Hosted Gold Deposit, KĂ©dougou-KĂ©nieba Inlier, West Africa. Economic Geology, 112 (1) 49-72 doi:10.2113/econgeo.112.1.49 | Journal (article/letter/editorial) | | 112, pp. 49â72 The Alamoutala Carbonate-Hosted Gold Deposit, KĂ©dougou-KĂ©nieba Inlier, West Africa Quentin...Perry Avenue, Kensington, WA 6152, Australia Ashanti Australia Limited, Asset Development-Brownfields...31400 Toulouse, France Abstract The Alamoutala gold deposit is located in the KĂ©dougou-KĂ©nieba inlier...microtextural data, however, indicate that economic gold mineralization is shear hosted and occurred during...magnetite-bearing skarn was overprinted by a region-wide orogenic gold event in the late Eburnean. Introduction |  | Lee, Moontaek, Shin, Dongbok, Yoo, Bongchul, Im, Heonkyung, Pak, Sangjoon, Choi, Sunki (2019) LA-ICP-MS trace element analysis of arsenopyrite from the Samgwang gold deposit, South Korea, and its genetic implications. Ore Geology Reviews, 114. 103147 doi:10.1016/j.oregeorev.2019.103147 | Journal (article/letter/editorial) | | element analysis of arsenopyrite from the Samgwang gold deposit, South Korea, and its genetic implications...T R A C T Keywords: Orogenic deposit Invisible gold Arsenopyrite LA-ICP-MS South Korea The Samgwang...Samgwang deposit, previously classiïŹed as an orogenic gold deposit, consists of several structurally controlled...Gyeonggi massif, South Korea. The gold at Samgwang occurs as electrum commonly associated with arsenopyrite...inclusions or discrete particles. Furthermore, measured gold concentrations were typically higher in arsenopyrite |  | Olson, Steven F., Diakite, Kassoum, Ott, Lawrence, Guindo, Ambogo, Ford, Christopher R. B., Winer, Nicholas, Hanssen, Eric, Lay, Nilda, Bradley, Robin, Pohl, Demetrius (1992) Regional setting, structure, and descriptive geology of the middle Proterozoic Syama gold deposit, Mali, West Africa. Economic Geology, 87 (2) 310-331 doi:10.2113/gsecongeo.87.2.310 | Journal (article/letter/editorial) | | Birimian(2.0-2.2 Ga) greenstonebelt in southernMali. Gold mineralizationis hostedby a thin (0.5-2.0 km) but...veinlets,andbrecciabodies.Pyriteis the principal gold-bearingmineral and occursdisseminatedin veinlet...ankerite,albite,andsericitealterationin the pyritic gold-bearingzones.Silica, Na20, Au, COe, S, and C havebeen... Tim Syamagolddepositis locatedin southernMali Ghana. 0361-0128/92/1313/310-2153.00 near the edge of...Ă . x Jeaâą lOON--. x x 'âą1 xAux xKalana x GHANA 8ON-- X X Xâą âą X'âą x X xX xâą.âąJâąi LEONE %x I' |  | | Journal (article/letter/editorial) | | and Gangue Quartz at the Degdekan and Golâtsovsky Gold Deposits, Magadan Oblast S. V. Voroshina, E. E....and Golâtsovsky goldâquartz deposits are located in the southeastern YanaâKolyma gold belt. The orebodies...INTRODUCTION Since the discovery of the YanaâKolyma gold belt in the 1930s, relationships between intrusive...sequence of geological events and the genesis of goldâquartz deposits. Special attention has been paid...bodies. Bilibin (1940) suggested an older age of the gold-bearing quartz veins relative to granitoids on the |  | Vial, D.S., Duarte, B.P., Fuzikawa, K., Vieira, M.B.H. (2007) An epigenetic origin for the Passagem de Mariana gold deposit, QuadrilĂĄtero FerrĂfero, Minas Gerais, Brazil. Ore Geology Reviews, 32 (3) 596-613 doi:10.1016/j.oregeorev.2005.03.017 | Journal (article/letter/editorial) | | An epigenetic origin for the Passagem de Mariana gold deposit, QuadrilĂĄtero FerrĂfero, Minas Gerais, Brazil...Available online 14 February 2007 Abstract The goldâtourmaline quartzâvein deposit of Passagem de Mariana...more than 60 tonne of gold, from the end of the 17th Century until 1954. The mine has not operated since... Tourmaline is present in all rock types in the mine, but the chemical composition of the host rocks...Pyrrhotite is usually found at the base of itabirites. Gold abundance is directly proportional to sulfide concentration |  | Bi, Shi-Jian, Li, Jian-Wei, Zhou, Mei-Fu, Li, Zhan-Ke (2011) Gold distribution in As-deficient pyrite and telluride mineralogy of the Yangzhaiyu gold deposit, Xiaoqinling district, southern North China craton. Mineralium Deposita, 46 (8) 925-941 doi:10.1007/s00126-011-0359-2 | Journal (article/letter/editorial) | | ARTICLE Gold distribution in As-deficient pyrite and telluride mineralogy of the Yangzhaiyu gold deposit...Yangzhaiyu lode gold deposit is situated in the southern edge of the North China craton. Gold mineralization...patterns of gold. The coarsegrained, euhedral G1 pyrite contains negligible to low levels of gold, whereas...whereas both invisible and visible gold are present in the fine- to medium-grained G2 pyrite that is characterized...(LA-ICP-MS) depth profiles indicate that invisible gold occurs either as solid solution or as nano- Editorial |  | | Journal (article/letter/editorial) | | Crystallography, Metallography and Composition of Gold Robert M. Hough1, Charles R. M. Butt1 and Jörg Fischer-BĂŒhner2...is an element, a metal and a mineral. In nature, gold most commonly occurs as an alloy with silver and...reacts. These properties offer insights into how gold deposits have formed and been altered, whether under...hydrothermal or Earth-surface conditions. Native gold nearly always occurs as an alloy with Ag; natural...platinoids, Hg, Pb, Sn, Sb and Bi are much rarer. Gold and Ag have the same atomic radius and so can form |  | Lemos, Mariana, Valente, Teresa, Reis, Paula Marinho, Fonseca, Rita, Delbem, Itamar, Ventura, Juliana, MagalhĂŁes, Marcus (2020) Mineralogical and Geochemical Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais, Brazil) Minerals, 11 (1) 39 doi:10.3390/min11010039 | Journal (article/letter/editorial) | | Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais...Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais...L.); pmarinho@dct.uminho.pt (P.M.R.) Anglogold Ashanti, Mining & Technical, COO International, Nova Lima...uminho.pt Abstract: For more than 30 years, sulfide gold ores were treated in metallurgic plants located...from an ongoing plant, were studied for their acid mine drainage potential and elementsâ mobility. Detailed |  | da Silva, Maria da GlĂłria, Silva Coelho, Carlos Eduardo, Teixeira, JoĂŁo Batista GuimarĂŁes, da Silva, Fernando CĂ©sar Alves, Silva, Roberto Albuquerque, de Souza, Jorge AndrĂ© Braz (2001) The Rio Itapicuru greenstone belt, Bahia, Brazil: geologic evolution and review of gold mineralization. Mineralium Deposita, 36 (3) 345-357 doi:10.1007/s001260100173 | Journal (article/letter/editorial) | | Bahia, Brazil: geologic evolution and review of gold mineralization Received: 20 November 1999 / Accepted:...2001 Ă Springer-Verlag 2001 Abstract Shear-hosted gold deposits in the Rio Itapicuru greenstone belt occur...collision and granitoid emplacement. In this context, gold mineralization occurred mainly during late collisional...rocks gave rise to the Weber gold belt, which contains the largest gold deposits of northeastern Brazil...of its gold districts, and discusses the overall geologic evolution of this Paleoproterozoic gold province |  | | Journal (article/letter/editorial) | | and fluid evolution of orogenic gold mineralisation at the Betam mine, south Eastern Desert, Egypt Basem...2007 # Springer-Verlag 2007 Abstract The Betam gold deposit, located in the southern Eastern Desert...subordinate galena, chalcopyrite, pyrrhotite and gold. Gold occurs in the quartz veins and adjacent wallrocks...around rhythmic goethite. Presence of refractory gold in arsenopyrite and pyrite is inferred from microprobe...arsenopyrite (30.4â30.7 wt.% As) associated with gold inclusions indicates a temperature range of 325â344°C |  | Lawrence, D.M., Allibone, A.H., Chang, Z., Meffre, S., Lambert-Smith, J.S., Treloar, P.J. (2017) The Tongon Au Deposit, Northern CĂŽte dâIvoire: An Example of Paleoproterozoic Au Skarn MineralizationâŒ. Economic Geology, 112 (7) 1571-1593 doi:10.5382/econgeo.2017.4522 | Journal (article/letter/editorial) | | change from white- to green-colored skarn. Spatially, gold-rich stage 3 alteration coincides with stage 2 intermediate...episode of orogenic Au mineralization in southwest Ghana and western Mali. Dating provides further evidence...a variety of different processes. Introduction Gold, rather than base metals, is the principal metal...major curved reverse faults during a period of region-wide contractional deformation (e.g., Twiss and...0 CĂŽte d'Ivoire Liberia Abidjan 250 500km Ghana 6° N Accra Atlantic Ocean Legend Neoproterozoic |  | Sung, Y.-H., Brugger, J., Ciobanu, C. L., Pring, A., Skinner, W., Nugus, M. (2009) Invisible gold in arsenian pyrite and arsenopyrite from a multistage Archaean gold deposit: Sunrise Dam, Eastern Goldfields Province, Western Australia. Mineralium Deposita, 44 (7) 765-791 doi:10.1007/s00126-009-0244-4 | Journal (article/letter/editorial) | | ARTICLE Invisible gold in arsenian pyrite and arsenopyrite from a multistage Archaean gold deposit: Sunrise...Springer-Verlag 2009 Abstract The Sunrise Dam gold mine (11.1 Moz Au) is the largest deposit in the Archaean...whereas arsenopyrite contains up to 5,767 ppm (n=19). Gold in arsenopyrite (D4a stage) was coprecipitated and...brugger@adelaide.edu.au M. Nugus Sunrise Dam Gold Mine, AngloGold Ashanti Australia Ltd, Laverton, Western Australia...Seoul 156-706, South Korea remained as âinvisible goldâ (nanoparticles and/or latticebound) during subsequent |  | | Journal (article/letter/editorial) | | Chile The Capricornio epithermal goldâsilverâcopper deposit, in the Region II, Chile, consists of multiple...chalcopyrite, sphalerite, bornite) as well as by electrum, sulphoarsenides, sulphoselenides, sulphoantimonides...traced deeper than 150â200 m from the surface, and gold is enriched mainly in the first 50 m. The reason...from El PenÌoÌn and from other deposits in the region (Warren, Archibald and Simmons 2008) indicate that...hyperarid period. In this deposit, secondary electrum, which typically consists of over 95% Au, was |  | | Report (chapter) | | Online First The Massawa gold deposit, Eastern Senegal, West Africa: an orogenic gold deposit sourced from...1, 2014 The Massawa gold deposit, Eastern Senegal, West Africa: an orogenic gold deposit sourced from...treloar@kingston.ac.uk) Abstract: The Massawa gold project is situated on the Senegalese side of the highly...inlier, which hosts several worldclass orogenic gold deposits/districts in western Mali (e.g. Loulo and...tetrahedrite veining distinguished by coarse visible gold and represents a late stage overprint on the primary |  | | Journal (article/letter/editorial) | | 2002 Refractory gold ores in Archaean greenstones, Western Australia: mineralogy, gold paragenesis, metallurgical...6845, Western Australia ABSTR ACT Mesothermal gold ores in the Archaean Yilgarn Craton of Western Australia...submicroscopic gold (60 270 ppm), but does not contain inclusions of particulate gold. Arsenopyrite in...submicroscopic gold, but contains inclusions and fracture fillings of particulate gold. In some refractory...contains moderately high levels of submicroscopic gold (20 40 ppm), the concentration of which is directly |
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