Hydrothermal Gold Mineralization at the Rodnikovoe Deposit in South Kamchatka, Russia
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The Rodnikovoe gold mine in southern Kamchatka as mentioned in this paper was the first known gold mine to be mined using the K-Ar method, and the age of the mine was estimated to be 0.9 to 1.1 Ma.Abstract:
. The Rodnikovoe gold deposit situated in a presently active hydrothermal system located north of the Mutnovsko-Asachinskaya geothermal area in southern Kamchatka, Far Eastern Russia, consists of typical low-sulfidation quartz-adularia veins in a host rock of diorite. The age of the mineralization was dated by the K-Ar method as 0.9 to 1.1 Ma based on adular-ia collected from the veins. Representative ore minerals in the deposit are electrum, argentite, aguilarite, polybasite, pearceite and lenaite. Dominant alteration minerals are adularia, α-cristobalite, chlorite, illite and kaolinite. Hydrothermal solutions of neutral pH were responsible for the mineralization, which is divided into six stages defined by tectonic boundaries. Gold mineralization occurred in stages I and III. Hydrothermal brecciation occurred during stages III, IV and VI. Stages II, IV, V and VI were barren. The estimated ore formation temperature based on a fluid inclusion study is 150 to 250 °C at a depth of approximately 170 m below the paleo-water table. Boiling of hydrothermal fluids is hypothesized as the cause of the intermittent deposition of gold ore. The sulfur and oxygen fugacities during the deposition of anhydrite prior to the hydrothermal brecciation were higher than those during the gold mineralization stages. The occurrence in the hydrothermal breccia of fragments of high grade Au-Ag and polymetallic ores suggests that higher grade mineralization of these metal ores might have occurred in a deeper portion of the deposit.read more
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Geochemical and Mineralogical Features in Zones of Anomalous Thermal Flows (Vilyuchinsky Hydrothermal System, South Kamchatka, Russia)
Victor M. Okrugin,Elena D. Andreeva,Anna M. Okrugina,Valerii M. Chubarov,Mikhail V. Chubarov +4 more
TL;DR: The Rodnikovy epithermal Au-Ag vein deposit is one of the largest gold fields of South Kamchatka as mentioned in this paper, with estimated reserve accounting for 40 t of Au and 470 t of Ag.
Journal ArticleDOI
The Role of Selenium and Hydrocarbons in Au-Ag Ore Formation in the Rodnikovoe Low-Sulfidation (LS) Epithermal Deposit, Kamchatka Peninsula, Russia
TL;DR: In this paper , the Rodnikovoe LS epithermal deposit is characterized by selenium speciation, and two main alternating ore assemblages have been identified: silver-aguilarite-acanthite and gold-uytenbogaardtite, acanthite.
The Role of Hydrocarbons in the Formation of Epithermal Gold–Silver Deposits in Kamchatka, Russia
Journal ArticleDOI
Silver Sulfides and Selenides in Ores from Au–Ag Epithermal Deposits of the Okhotsk—Chukotka Volcanic Belt
Correlation of Epithermal and Geothermal Deposits (an Example of Mutnovsky Geothermal Area, Southern Kamchatka)
Victor Okrugin,Ivan I. Chernev +1 more
TL;DR: The Mutnovskoe Au-Ag-polymetallic deposit and the Mutnovsky geothermal area are located within the Mutnovsko-Asachinsky volcanic center in South Kamchatka as mentioned in this paper.
References
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