The Gaching Au mineralization in the Maletoivayam ore field, Kamchatka, Russia
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F17%3A00000080" target="_blank" >RIV/00025798:_____/17:00000080 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
The Gaching Au mineralization in the Maletoivayam ore field, Kamchatka, Russia
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
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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Number of pages
4
Pages from-to
195-198
Publisher name
Society for Geology Applied to Mineral Deposits
Place of publication
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Event location
Quebec City, Kanada
Event date
Jan 1, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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