First Data on the Mineralogy of the Evevpenta Epithermal Silver–Gold Ore Occurrence, Kamchatka, Russia

IF 0.7 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Journal of Volcanology and Seismology Pub Date : 2024-06-21 DOI:10.1134/S0742046324700489

P. S. Zhegunov, A. V. Kutyrev, E. S. Zhitova, S. V. Moskaleva, P. E. Schweigert

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Abstract

The Evevpenta ore occurrence is situated in the northeastern part of the Central Kamchatka volcanic belt (Kamchatka Peninsula, Russia), and lies among andesitic volcanic complexes of the Neogene age. The ore bodies are veins, zones of quartz streaks, and hydrothermal breccias, accompanied by aureoles of argillization which transition into propylites at the periphery. The formation of noble-metal mineralization occurred through two phases: the hypogene (hydrothermal) phase and the hypergene phase. For the hypogene phase we have identified two mineral associations related to noble-metal mineralization: the Central area contains gold—telluride–quartz mineralization, while the Northern area hosts telluride–sulfide–quartz mineralization. The hypergene mineral association with native gold occurs within the Central area only. Based on data relating to the material composition of the ores we show that the Evevpenta ore occurrence is a typical member of epithermal reduction-alkaline or low sulfidation deposits.

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关于俄罗斯堪察加州 Evevpenta 热液银金矿矿点矿物学的首批数据

摘要 Evevpenta 矿区位于中堪察加火山带（俄罗斯堪察加半岛）东北部，地处新近纪安山质火山群之间。矿体为矿脉、石英条带和热液角砾岩，伴有芒硝化，外围过渡为丙炔岩。惰性金属矿化的形成经历了两个阶段：下成岩（热液）阶段和高成岩阶段。在下成岩阶段，我们发现了两种与贵金属矿化有关的矿物关联：中部地区含有金-碲-石英矿化，而北部地区则含有碲-硫化物-石英矿化。与原生金相关的超生金矿物仅出现在中部地区。根据与矿石物质成分有关的数据，我们发现伊夫潘塔矿区是典型的热液还原-碱性或低硫化矿床。

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来源期刊

Journal of Volcanology and Seismology 地学-地球化学与地球物理

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.