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Mineral assemblages of the porphyry tin-polymetallic ores of Mount Krasnaya paleovolcano of the Krasnogorsky deposit in the Dal'negorsk ore district.

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Title: Mineral assemblages of the porphyry tin-polymetallic ores of Mount Krasnaya paleovolcano of the Krasnogorsky deposit in the Dal'negorsk ore district.
Authors: Simanenko, L.1, Ratkin, V.1, Turchin, V.1
Source: Russian Journal of Pacific Geology. Mar2015, Vol. 9 Issue 2, p120-135. 16p.
Subject Terms: *Mineralogical research, *Ore deposits, *Mineralization, *Porphyry, *Sphalerite, *Stannite, *Cassiterite, Sikhote-Alin Range (Russia)
Abstract: This paper presents the results of the detailed mineralogical study of the pocket-disseminated tinzinc (cassiterite-sulfide) and vein-metasomatic tin-silver-polymetallic ores localized in the vent of the Mount Krasnaya paleovolcano (Krasnogorsky polymetallic deposit). The tin-zinc ores of the early Late Maastrichtian stage of the ore formation are associated with pipelike bodies of explosion breccias, were formed at a temperature of around 300°C, and include three mineral assemblages: the (1) pyrite, (2) productive quartz-cassiterite-sphalerite, and (3) late sulfosalt-galena-chalcopyrite ones. The vein-metasomatic tin-silver-polymetallic ores of the late Paleocene stage are associated with rhyolite bodies, controlled by the NW-oriented faults, and cut mineralized breccia. These ores were formed during a full two-stage hydrothermal cycle within the temperature interval from 500 to 1000°C and include five consecutive ore mineral assemblages: (1) wolframite-arsenopyrite, (2) cassiterite-sphalerite-pyrite-chalcopyrite, (3) stannite-Ag-bearing sulfosalt, (4) freibergite-galena, and (5) native silver-stephanite-acanthite. The tin-silver-polymetallic ores are assumed to have formed simultaneously with the extended silver-bearing galena-sphalerite veins cutting the Primorskaya Group volcanic rocks around the paleovolcano. In the extended vein zones, the tinsilver-polymetallic ores correspond to the uppermost (closest to the paleosurface) part of the vertical zoning. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Abstract:This paper presents the results of the detailed mineralogical study of the pocket-disseminated tinzinc (cassiterite-sulfide) and vein-metasomatic tin-silver-polymetallic ores localized in the vent of the Mount Krasnaya paleovolcano (Krasnogorsky polymetallic deposit). The tin-zinc ores of the early Late Maastrichtian stage of the ore formation are associated with pipelike bodies of explosion breccias, were formed at a temperature of around 300°C, and include three mineral assemblages: the (1) pyrite, (2) productive quartz-cassiterite-sphalerite, and (3) late sulfosalt-galena-chalcopyrite ones. The vein-metasomatic tin-silver-polymetallic ores of the late Paleocene stage are associated with rhyolite bodies, controlled by the NW-oriented faults, and cut mineralized breccia. These ores were formed during a full two-stage hydrothermal cycle within the temperature interval from 500 to 1000°C and include five consecutive ore mineral assemblages: (1) wolframite-arsenopyrite, (2) cassiterite-sphalerite-pyrite-chalcopyrite, (3) stannite-Ag-bearing sulfosalt, (4) freibergite-galena, and (5) native silver-stephanite-acanthite. The tin-silver-polymetallic ores are assumed to have formed simultaneously with the extended silver-bearing galena-sphalerite veins cutting the Primorskaya Group volcanic rocks around the paleovolcano. In the extended vein zones, the tinsilver-polymetallic ores correspond to the uppermost (closest to the paleosurface) part of the vertical zoning. [ABSTRACT FROM AUTHOR]
ISSN:18197140
DOI:10.1134/S1819714015020062