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Kachkanar, Gusevogorsh, Sobstvenno |
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Russia |
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Ti Fe PGE PGM
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Super Porphyry Cu and Au
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IOCG Deposits - 70 papers
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All papers now Open Access.
Available as Full Text for direct download or on request. |
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The Sobstvenno-Kachkanar Fe-Ti-PGE deposit occurs within the Central Uralian Fold Belt of Russia, and is located 200 km NNW of Eekaterinburg and 125 km SSW of Serov (#Location: 58° 45' 10"N, 59° 30' 28"E).
Ore occurs within the laccolithic Kachkanar gabbro-pyroxenite pluton which occupies an area of 110 sq km (Smirnov, 1977).
The Kachkanar massif is surrounded by Silurian plagioclase porphyries and basaltic volcanics on its eastern margin, and Ordovician mica and siliceous schists on its western side. To the north and south the gabbro is replaced by amphibolite. Pyroxenite forms half of the area of the intrusion, comprising two separate masses within it, the Gusevogorsh in the east and the Kachkanar to the west. The Gusevogorsh pyroxenite is composed partially of peridotite, hornblendite and gabbro, and is elongated north-south with dimensions of 8.5 x 1 to 3.5 km. The Kachkanar pyroxenite massif, which includes olivinites and peridotites, covers an area of 5.5 x 3.2 km (Smirnov, 1977).
In 1977, the Glavnaya 'vein' in the Gusevogorsh pyroxenite had been mined. The better quality mineralisation covered a surface area of 1.1 sq km and persisted to depths of at least 500 to 600 m below the surface, but included intervening low grade and barren shoots. These barren patches were generally equi-dimensional with areas of 1000 to 2000 sq m. The orebodies represent segregations of titano-magnetite, and less frequently schlieren segregations, and veinlets of massive ores, mainly in the pyroxenite, gabbro and hornblendite, and to a considerably lesser degree in the peridotites and olivinites. The ores range in grain size from coarse (>3 mm) to fine dispersions (<0.05 mm) (Smirnov, 1977).
The principal ore mineral is titano-magnetite with solid solution textural dis-associations containing 2 to 18% ilmenite. The titano-magnetite contains an isomorphous trace of vanadium. Minor pyrite and pyrrhotite and less frequently chalcopyrite, pentlandite and bornite, native platinum and platinoids are also present. The gangue is composed of pyroxenes and amphiboles, with lesser chlorite and biotite. The ores are characterised by low 15 to 18% Fe (but ranging from 14 to 34%), 0.8 to 2% TiO2, 0.05 to 0.31% V2O5, tenths of a ppm platinoids. Phosphorous and sulphur are practically absent.
Reserves quoted in 1977 included 3.5 Mt at Gusevogorsh and 2.6 Mt at Kachkanar, with an average grade of 16.6% Fe (Smirnov, 1977).
The most recent source geological information used to prepare this decription was dated: 1997.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
Kachkanar
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Auge T, Genna A, Legendre O, Ivanov K S and Volchenko Yu A 2005 - Primary Platinum Mineralization in the Nizhny Tagil and Kachkanar Ultramafic Complexes, Urals, Russia: A Genetic Model for PGE Concentration in Chromite-Rich Zones: in Econ. Geol. v100 pp 707-732
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Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge. It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published. While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
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