The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
نویسندگان
چکیده
The Baranyevskoe Au-Ag epithermal deposit of low-sulfidation (LS) type is located on the Kamchatka Peninsula in Neogene-Quaternary Central Volcanic Belt, where Au-bearing quartz veins are usually accompanied by veinlet stockworks. Two economic associations typical deposit. first corresponds to gold-pyrite-quartz association with low-grade native gold (521–738‱) intergrown pyrite. Some accessory minerals within early were also identified: acanthite AgS2, hessite AgTe2, lenaite Ag(Fe,Cu)S2, petzite Ag3AuTe2, utenbogardite Ag3AuS2 and unnamed Ag-Sb-As sulfosalts. former most likely formed temperature range 320–330 °C based study arsenopyrite thermometers fluid inclusions. second, a gold-sulfosalt-quartz association, includes high-grade (883-941‱) intergrowth chalcopyrite. Cuprous phases (bornite, chalcocite, heerite, copper, Cu-Zn solid solutions), Bi-rich sulfosalts (aikinite PbCuBiS3, emplectite CuBiS2, witticenite Cu3BiS3), stannoidite Cu8Fe3Sn2S12, mawsonite Cu6Fe2SnS8), galena, Te-free tetrahedrite-tennantite represent this association. Fluid inclusions characterized homogenization ranging from 226 298 °C, salinity 0.4 1.2 wt. % NaCl eq.
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ژورنال
عنوان ژورنال: Minerals
سال: 2021
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min11111225