 | | 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) | | 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) | | pp. S307–S320 Supergene gold enrichment in the Castromil-Serra da Quinta gold deposit, NW Portugal C....Associate Editor: John Bowles] ABSTR ACT Several gold deposits hosted mainly by Variscan granites and...surface galleries. The Castromil-Serra da Quinta gold deposit is an important example of such a mined...mineralization below the oxidation level. Different modes of gold occurrence are defined based on metallographic studies...cores. Gold I occurs encapsulated in primary sulfide minerals, mainly arsenopyrite and pyrite; Gold II is |  | Majzlan, Juraj, Lazic, Biljana, Armbruster, Thomas, Johnson, Michel B., White, Mary Anne, Fisher, Robert A., Plášil, Jakub, Loun, Jan, Škoda, Radek, Novák, Milan (2012) Crystal structure, thermodynamic properties, and paragenesis of bukovskýite, Fe2(AsO4)(SO4)(OH)·9H2O. Journal of Mineralogical and Petrological Sciences, 107 (3) 133-148 doi:10.2465/jmps.110930 | Journal (article/letter/editorial) | | bukovskýite, scorodite, kaňkite, zýkaite, and pitticite was reported from Munzig in Saxony (Germany) (Hyršl...this study, were described for the Christbescherung mine near Großvoigtsberg in Saxony, Germany (Witzke and...melanterite, and jarosite in the lake pit of the former mine Getchell in Nevada (USA) (Bowell and Parshley, 2005)... Bukovskýite was also found at the Golden Point mine in New Zealand, where it occurs together with scorodite...(Triantafyllidis and Skarpelis, 2006), and Ashanti region in Ghana (Smedley, 1996). Bukovskýite can be formed |  | | Book (edition) | | 35 mm, Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit...various degrees. less common are malleable (e.g gold). ductile (e.g. copper). sectile (e.g. chalcocite)...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...by Mobutu, and is now the Katanga administrative region again. The former Kivu province is now divided...United States or of the Upper Silesian historical region in Poland, where the importance of ore-bearing |  | | Book (volume) | | DEPOSITS. 341 Besides the cobalt-nickel veins, the region also contains veins of carbonate spars free from...district of Schneeberg, in Saxony, a mountainous region 1,300 to 1,600 feet (400 to 500 m.) above the sea...have been mined to a Down to 52 m. (170 ft.) the mine was dry. depth of 56 m. (183 ft.) Chrysoprase,...The ancient Athenians are said to have in this region. the mines. Between 1564 and 1895 the tons of...coal beds of the Carboniferous. The ores of this region are much poorer than those of Almaden. For the |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | have been undertaken. The initial stages of this project were undertaken by the late Horace Winchell of...present editor, Philip Manor, without whom this project would never have seen the light of day. Finally...applies only to opaque materials imperfectly metallic Gold, copper, tin The luster of diamond, other materials...when cut by a knife Gold, silver Ductile Sectile Flexible Elastic Brittle Gold, silver, copper Chlorargylite...Elements and Alloys GoL_p Group The members of the gold group are elements or intermetallic compounds that |
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