Conditions of formation of Au-Se-Te mineralization in the Gaching ore occurrence (Maletoyvayam ore field), Kamchatka, Russia
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10393045" target="_blank" >RIV/00216208:11310/18:10393045 - isvavai.cz</a>
Alternative codes found
RIV/00025798:_____/18:00000051
Result on the web
<a href="https://pubs.geoscienceworld.org/minmag/article/82/3/649/544756" target="_blank" >https://pubs.geoscienceworld.org/minmag/article/82/3/649/544756</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1180/mgm.2018.84" target="_blank" >10.1180/mgm.2018.84</a>
Alternative languages
Result language
angličtina
Original language name
Conditions of formation of Au-Se-Te mineralization in the Gaching ore occurrence (Maletoyvayam ore field), Kamchatka, Russia
Original language description
The Gaching high-sulfidation epithermal deposit in the Maletoyvayam ore fi eld features a wide range of Se- containing minerals and selenides, as well as complex gold oxides, Au tellurides (calaverite, krennerite) and native gold typical for epithermal deposits. Pyrite included in quartzites and quartzalunite rocks was probably formed during an early stage of the ore-forming process. During the following Au-rich stage, the f(Se2)/f(S2) increased with f(O2) being relatively high, resulting in the formation of very rare compounds that have not been previously described in nature. These include Au2Te4(Se,S)(3), Se3Te2, AuSe and Au(Te,Se,S) phases. The Au2Te4(Se,S)(3 )compounds have some variations in composition: the complete isomorphic series between Au2Te4Se3 and Au2Te4S3 was observed. The gold and Au-minerals at the main ore stage can be stable within a range of logf(O2), of -27.3 and atmospheric oxygen (?); logf(Se2), between -12.4 and -5.7; logf(Te2) between -10.5 and -7.8; and logf(S2) between -12.8 and -6.8 (at 250 degrees C). The increasing oxygen fugaciiy during the final stage of mineralization resulted in the formation of complex Sb,As,Te,S-bearing Au oxides. Gold-oxide fonnation occurs due to oxidation of Au-tellurides. The final products of this process are newly-formed secondary mustard gold and Te-Se solid solutions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA18-15390S" target="_blank" >GA18-15390S: Experimental and mineralogical study of selected platinum-group chalcogenides and alloys</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mineralogical Magazine
ISSN
0026-461X
e-ISSN
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Volume of the periodical
82
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
26
Pages from-to
649-674
UT code for WoS article
000452140100011
EID of the result in the Scopus database
2-s2.0-85056236516