The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka

The Baranyevskoe Au-Ag epithermal deposit of low-sulfidation (LS) type is located on the Kamchatka Peninsula in the Neogene-Quaternary Central Kamchatka Volcanic Belt, where Au-bearing quartz veins are usually accompanied by veinlet stockworks. Two economic associations are typical of the Baranyevsk...

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Autores principales:	Nadezhda Tolstykh, Daria Bukhanova, Maria Shapovalova, Andrey Borovikov, Maksim Podlipsky
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Baranyevskoe deposit LS epithermal deposit gold-pyrite-quartz association gold-sulfosalt-quartz association Kamchatka Peninsula Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/7a7fd662ef9541ebbb0ea39c910dad1c
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spelling	oai:doaj.org-article:7a7fd662ef9541ebbb0ea39c910dad1c2021-11-25T18:26:25ZThe Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka10.3390/min111112252075-163Xhttps://doaj.org/article/7a7fd662ef9541ebbb0ea39c910dad1c2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1225https://doaj.org/toc/2075-163XThe Baranyevskoe Au-Ag epithermal deposit of low-sulfidation (LS) type is located on the Kamchatka Peninsula in the Neogene-Quaternary Central Kamchatka Volcanic Belt, where Au-bearing quartz veins are usually accompanied by veinlet stockworks. Two economic associations are typical of the Baranyevskoe deposit. The first corresponds to gold-pyrite-quartz association with low-grade native gold (521–738‱) intergrown with pyrite. Some accessory Au-Ag minerals within the early association were also identified: acanthite AgS<sub>2</sub>, hessite AgTe<sub>2</sub>, lenaite Ag(Fe,Cu)S<sub>2</sub>, petzite Ag<sub>3</sub>AuTe<sub>2</sub>, utenbogardite Ag<sub>3</sub>AuS<sub>2</sub> and unnamed Ag-Sb-As sulfosalts. The former Au-Ag minerals were most likely formed in the temperature range of 320–330 °C based on the study of arsenopyrite thermometers and fluid inclusions. The second, a gold-sulfosalt-quartz association, includes high-grade native gold (883-941‱) in intergrowth with chalcopyrite. Cuprous phases (bornite, chalcocite, heerite, native copper, Cu-Zn solid solutions), Bi-rich sulfosalts (aikinite PbCuBiS<sub>3</sub>, emplectite CuBiS<sub>2</sub>, witticenite Cu<sub>3</sub>BiS<sub>3</sub>), stannoidite Cu<sub>8</sub>Fe<sub>3</sub>Sn<sub>2</sub>S<sub>12</sub>, mawsonite Cu<sub>6</sub>Fe<sub>2</sub>SnS<sub>8</sub>), Au-bearing galena, Te-free and Bi-rich tetrahedrite-tennantite represent this association. Fluid inclusions in gold-sulfosalt-quartz association are characterized by homogenization temperature ranging from 226 to 298 °C, and salinity from 0.4 to 1.2 wt. % NaCl eq.Nadezhda TolstykhDaria BukhanovaMaria ShapovalovaAndrey BorovikovMaksim PodlipskyMDPI AGarticleBaranyevskoe depositLS epithermal depositgold-pyrite-quartz associationgold-sulfosalt-quartz associationKamchatka PeninsulaMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1225, p 1225 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Baranyevskoe deposit LS epithermal deposit gold-pyrite-quartz association gold-sulfosalt-quartz association Kamchatka Peninsula Mineralogy QE351-399.2
spellingShingle	Baranyevskoe deposit LS epithermal deposit gold-pyrite-quartz association gold-sulfosalt-quartz association Kamchatka Peninsula Mineralogy QE351-399.2 Nadezhda Tolstykh Daria Bukhanova Maria Shapovalova Andrey Borovikov Maksim Podlipsky The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
description	The Baranyevskoe Au-Ag epithermal deposit of low-sulfidation (LS) type is located on the Kamchatka Peninsula in the Neogene-Quaternary Central Kamchatka Volcanic Belt, where Au-bearing quartz veins are usually accompanied by veinlet stockworks. Two economic associations are typical of the Baranyevskoe deposit. The first corresponds to gold-pyrite-quartz association with low-grade native gold (521–738‱) intergrown with pyrite. Some accessory Au-Ag minerals within the early association were also identified: acanthite AgS<sub>2</sub>, hessite AgTe<sub>2</sub>, lenaite Ag(Fe,Cu)S<sub>2</sub>, petzite Ag<sub>3</sub>AuTe<sub>2</sub>, utenbogardite Ag<sub>3</sub>AuS<sub>2</sub> and unnamed Ag-Sb-As sulfosalts. The former Au-Ag minerals were most likely formed in the temperature range of 320–330 °C based on the study of arsenopyrite thermometers and fluid inclusions. The second, a gold-sulfosalt-quartz association, includes high-grade native gold (883-941‱) in intergrowth with chalcopyrite. Cuprous phases (bornite, chalcocite, heerite, native copper, Cu-Zn solid solutions), Bi-rich sulfosalts (aikinite PbCuBiS<sub>3</sub>, emplectite CuBiS<sub>2</sub>, witticenite Cu<sub>3</sub>BiS<sub>3</sub>), stannoidite Cu<sub>8</sub>Fe<sub>3</sub>Sn<sub>2</sub>S<sub>12</sub>, mawsonite Cu<sub>6</sub>Fe<sub>2</sub>SnS<sub>8</sub>), Au-bearing galena, Te-free and Bi-rich tetrahedrite-tennantite represent this association. Fluid inclusions in gold-sulfosalt-quartz association are characterized by homogenization temperature ranging from 226 to 298 °C, and salinity from 0.4 to 1.2 wt. % NaCl eq.
format	article
author	Nadezhda Tolstykh Daria Bukhanova Maria Shapovalova Andrey Borovikov Maksim Podlipsky
author_facet	Nadezhda Tolstykh Daria Bukhanova Maria Shapovalova Andrey Borovikov Maksim Podlipsky
author_sort	Nadezhda Tolstykh
title	The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
title_short	The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
title_full	The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
title_fullStr	The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
title_full_unstemmed	The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka
title_sort	gold mineralization of the baranyevskoe au-ag epithermal deposit in central kamchatka
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7a7fd662ef9541ebbb0ea39c910dad1c
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The Gold Mineralization of the Baranyevskoe Au-Ag Epithermal Deposit in Central Kamchatka

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