| Инд. авторы: | Tolstykh N.D., Palyanova G.A., Bobrova O.V., Sidorov E.G. |
| Заглавие: | Mustard Gold of the Gaching Ore Deposit (Maletoyvayam Ore Field, Kamchatka, Russia) |
| Библ. ссылка: | Tolstykh N.D., Palyanova G.A., Bobrova O.V., Sidorov E.G. Mustard Gold of the Gaching Ore Deposit (Maletoyvayam Ore Field, Kamchatka, Russia) // MINERALS. - 2019. - Vol.9. - Iss. 8. - Art.489. |
| Внешние системы: | DOI: 10.3390/min9080489; РИНЦ: 41696075; SCOPUS: 2-s2.0-85073285162; WoS: 000482981400046; |
| Реферат: | eng: The Gaching high-sulfidation (HS) epithermal Au-Ag deposits, part of the Maletoyvayam ore field, which is located in the volcanic belts of the Kamchatka Peninsula (Russia). The main ore components are native gold, tellurides, selenides, and sulphoselenotellurides of Au and oxidation products of Au-tellurides. This study examines the different types of native gold in this ore deposit and the mechanisms and sequential transformation of calaverite (AuTe2) into mustard gold. The primary high fineness gold (964 parts per thousand-978 parts per thousand) intergrown with maletoyvayamite Au3Te6Se4 and other unnamed phases (AuSe, Au(Te,Se)) differ from the secondary (mustard) gold in terms of fineness (1000 parts per thousand) and texture. Primary gold is homogeneous, whereas mustard is spongy. Two types of mustard gold were identified: (a) Mixtures of Fe-Sb(Te,Se,S) oxides and fine gold particles, which formed during the hypogenic transformation stage of calaverite due to the impact of hydrothermal fluids, and (b) spotted and colloform gold consisting of aggregates of gold particles in a goethite/hydrogoethite matrix. This formed during the hypergenic transformation stage. Selenides and sulphoselenotellurides of gold did not undergo oxidation. Pseudomorphic replacement of calaverite by Au-Sb(Te,Se,S,As) oxides was also observed.
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| Ключевые слова: | MECHANISM; AU; HEBEI PROVINCE; TE MINERALIZATION; As)-oxides; S; Se; Au-Sb(Te; KINETICS; Se; As; Fe-Sb(Te; maletoyvayamite; calaverite; mustard gold; Gaching ore deposit; S)-oxides; TRANSFORMATION; |
| Издано: | 2019 |
| Физ. характеристика: | 489 |