The Gaching Au mineralization in the Maletoivayam ore field, Kamchatka, Russia

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Gaching Au mineralization in the Maletoivayam ore field, Kamchatka, Russia

Popis výsledku v původním jazyce

Samples from the Gaching Au mineralization from the Maletoivayam ore field, Kamchatka, were studied. The vein hosted and disseminated pyrite at Gaching is associated with Au-bearing minerals in intensely oxidized quartzite and quartz-alunite altered rocks. Noble metal mineralization is represented by native gold (15%) and Au compounds with Te, Sb, As, Se, and S (85%). Gold forms xenomorphic grains (10-50 μm), orange-brown in color, and with porous structure, which is known as “mustard” gold. The gold may contain minor Fe occurring as pore filling iron hydroxides. The main Au- and Ag-bearing minerals are calaverite, krennerite, unnamed Au2Te4(Se,S)3 and Au-Fe-Ag-Sb-As-Te oxide with variable element ratios (grains up to 60 μm). The Au2Te4(Se,S)3 phases (both Se-, and S-rich) found at Gaching, have not been reported before in nature. However, the synthetic analogue of the phase Au2Te4Se3 was reported. The phase (Au,Fe)3(Sb,As)O6 exists as a stable Au-Ag oxide. Gold mineralization is associated with tetrahedrite, tennantite, goldfieldite, native tellurium, bismite, guanajuatite, rooseveltite, and tripuhyite. The sequence of crystallization for the Au-Ag mineralization is as follows: (1) Au,Ag alloys and Au,Ag-sulfo-seleno-telluride with associated fahlore; (2) complex Au,Ag-oxides containing Sb and As, unnamed Au2Te4(Se,S)3, and hessite in association with native tellurium and fahlore; and (3) high-grade mustard gold.

Název v anglickém jazyce

The Gaching Au mineralization in the Maletoivayam ore field, Kamchatka, Russia

Popis výsledku anglicky

Samples from the Gaching Au mineralization from the Maletoivayam ore field, Kamchatka, were studied. The vein hosted and disseminated pyrite at Gaching is associated with Au-bearing minerals in intensely oxidized quartzite and quartz-alunite altered rocks. Noble metal mineralization is represented by native gold (15%) and Au compounds with Te, Sb, As, Se, and S (85%). Gold forms xenomorphic grains (10-50 μm), orange-brown in color, and with porous structure, which is known as “mustard” gold. The gold may contain minor Fe occurring as pore filling iron hydroxides. The main Au- and Ag-bearing minerals are calaverite, krennerite, unnamed Au2Te4(Se,S)3 and Au-Fe-Ag-Sb-As-Te oxide with variable element ratios (grains up to 60 μm). The Au2Te4(Se,S)3 phases (both Se-, and S-rich) found at Gaching, have not been reported before in nature. However, the synthetic analogue of the phase Au2Te4Se3 was reported. The phase (Au,Fe)3(Sb,As)O6 exists as a stable Au-Ag oxide. Gold mineralization is associated with tetrahedrite, tennantite, goldfieldite, native tellurium, bismite, guanajuatite, rooseveltite, and tripuhyite. The sequence of crystallization for the Au-Ag mineralization is as follows: (1) Au,Ag alloys and Au,Ag-sulfo-seleno-telluride with associated fahlore; (2) complex Au,Ag-oxides containing Sb and As, unnamed Au2Te4(Se,S)3, and hessite in association with native tellurium and fahlore; and (3) high-grade mustard gold.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Mineral Resources to Discover. Proceedings of the 14th Biennial SGA Meeting, Quebéc, Canada,volume 1

ISBN

978-2-9816898-0-1

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

195-198

Název nakladatele

Society for Geology Applied to Mineral Deposits

Místo vydání

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Místo konání akce

Quebec City, Kanada

Datum konání akce

1. 1. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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