 | Tedeschi, Michael, Hagemann, Steffen G., Roberts, Malcolm P., Evans, Noreen J. (2018) The Karouni Gold Deposit, Guyana, South America: Part II. Hydrothermal Alteration and Mineralization. Economic Geology, 113 (8) 1705-1732 doi:10.5382/econgeo.2018.4610 | Journal (article/letter/editorial) | | 113, no. 8, pp. 1705–1732 The Karouni Gold Deposit, Guyana, South America: Part II. Hydrothermal Alteration...orogenic gold deposits are located in north-central Guyana 35 km to the west of the 5 Moz Omai gold deposit...orogenic gold deposits for its dominant sodic alteration and distinct lack of potassic alteration. Gold is...zones and as coarse native gold within the quartz-carbonate veins. Minor gold is also located within Au-bearing...sulfidation via redox reaction as a possible mechanism of gold deposition. Mass balance modeling of the hydrothermal |  | Barkov, Andrei Y., Shvedov, Gennadiy I., Flemming, Roberta L., Vymazalová, Anna, Martin, Robert F. (2017) Melonite from Kingash and Kuskanak, Eastern Sayans, Russia, and the extent of Bi-for-Te substitution in melonite and synthetic Ni(Te,Bi)2–x. Mineralogical Magazine, 81 (3) 695-705 doi:10.1180/minmag.2016.080.119 | Journal (article/letter/editorial) | | Magazine, June 2017, Vol. 81(3), pp. 695–705 Melonite from Kingash and Kuskanak, Eastern Sayans, Russia...Russia, and the extent of Bi-for-Te substitution in melonite and synthetic Ni(Te,Bi)2–x ANDREI Y. BARKOV1,*...ABSTR ACT We describe occurrences of palladoan melonite in intimate intergrowths with cobaltite-gersdorffite... Russia. The observed compositional trends of melonite are consistent with the overall variations examined...basis of our observations made on specimens of melonite and synthetic Ni(Te,Bi)2–x (x = 0.6), we infer |  | | Report (issue) | | Melonite NiTe2 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal. Point Group:...5.265 Z=1 X-ray Powder Pattern: Robb-Montbray mine, Canada. 2.82 (100), 1.549 (60), 2.06 (50), 1.918...Stanislaus mine, California, USA; corresponding to (Ni0.99 Ag0.02 )Σ=1.01 Te2.00 . (2) Strathcona mine, Canada;...Mineral Group: Forms a series with merenskyite. Melonite group. Occurrence: With other tellurium minerals...coloradoite, krennerite, tellurobismuthite, montbrayite, gold, pyrite, chalcopyrite, pentlandite, pyrrhotite. |  | | Journal (article/letter/editorial) | | www.elsevier.com/locate/precamres The Choco 10 gold deposit (El Callao, Bolivar State, Venezuela): Petrography...Choco 10 gold deposit Petrography Hydrothermal fluids and alteration U–Pb geochronology Guyana Shield ...(Bolivar State), Choco 10 is one of the most important gold deposits in Venezuela. The deposit occurs in the...lithostratigraphic Province of the South American Guyana Shield. The Choco 10 lithostratigraphy is composed...elements patterns typical of calc-alkaline rocks. Gold has been introduced into the rock sequence in different |  | | Journal (article/letter/editorial) | | Schlema-Alberode ore field in the ancient mining region of Saxony, Germany (Förster et al. 2003). In addition...bohdanowiczite, is known from the Frederik VII’s Cu mine in south Greenland (Schønwandt 1983). Formation...Rudashevskiy, N. S. & Karshevskiy, P. I. (1998): Native gold and silver, sulfides and REE minerals in carbonatites...Garuti, G. & Rinaldi, R. (1986): Mineralogy of melonite-group and other tellurides from the Ivrea-Verbano...New find of silver tellurosulphides from the Funan gold deposit, East Shandong, China. – Eur. J. Miner. |  | Maslennikov, V. V., Maslennikova, S. P., Large, R. R., Danyushevsky, L. V., Herrington, R. J., Stanley, C. J. (2013) Tellurium-bearing minerals in zoned sulfide chimneys from Cu-Zn massive sulfide deposits of the Urals, Russia. Mineralogy and Petrology, 107 (1) 67-99 doi:10.1007/s00710-012-0230-x | Journal (article/letter/editorial) | | Au-Ag telluride and galena-fahlore with native gold assemblages. Decreasing amounts of pyrite, both...deposits, particularly in epithermal vein deposits of gold and silver (Afifi et al. 1988b; Ciobanu et al. 2006;...sylvanite, frohbergite, native tellurium, native gold, magnetite Pyrite, chalcopyrite, sphalerite, bornite...jalpaite, mackinstryite, stannoidite, mowsonite, native gold Pyrite, chalcopyrite, pyrrhotite, altaite, tellurobismuthite...coloradoite, shtützite, hessite, native tellurium, native gold, tennantite, tetrahedrite, magnetite, arsenopyrite |
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