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• 2015
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• issue 5
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• Chrome-spinellides and accessory mineralization in weathered crust of the Vladimir deposit (Varshavsky ultrabasic massif, the South Urals)

Chrome-spinellides and accessory mineralization in weathered crust of the Vladimir deposit (Varshavsky ultrabasic massif, the South Urals)

Ankushev M. N., Zaykov V. V., Koilyarov V. A., Romanenko M. E.

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2015. V. 144. N 5. P. 76-96

Full text is available 

Language: Russian

Abstract

The paper displays characteristics of chrome-spinellides from the ore-hosting packet of the Vladimir chromium deposit. By morphology and composition, there are distinguished three principal types of chrome-spinellides: the medium-grade chromium ore, high-chromium altered and low-chromium accessory relic ones. The significant role of weathering crust conditions is shown in alteration of accessory chrome-spinellides. Formation of the high-chromium spinellides is explained by the thermal-fluids influence of the Varshavsky granitoid massif with accompanying dikes and talc-carbonate metasomatites. Characteristic accessory minerals are represented by native gold, nickel, millerite, pentlandite, chalcopyrite, mauherite, PGE sulfides, picroilmenite.

Key words: accessory chrome-spinellides, metamorphism of chrome-spinellides, PGE sulfides, picroilmenite.