Conditions of formation of Au-Se-Te mineralization in the Gaching ore occurrence (Maletoyvayam ore field), Kamchatka, Russia

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00025798:_____/18:00000051

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Conditions of formation of Au-Se-Te mineralization in the Gaching ore occurrence (Maletoyvayam ore field), Kamchatka, Russia

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Conditions of formation of Au-Se-Te mineralization in the Gaching ore occurrence (Maletoyvayam ore field), Kamchatka, Russia

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA18-15390S" target="_blank" >GA18-15390S: Experimentální a mineralogický výzkum vybraných chalkogenidů a slitin Pt-kovů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Svazek periodika

82

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

26

Strana od-do

649-674

Kód UT WoS článku

000452140100011

EID výsledku v databázi Scopus

2-s2.0-85056236516