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Colloform high-purity platinum from the placer deposit of Koura River (Gornaya Shoriya, Russia)

Nesterenko, GV; Zhmodik, SM; Airiyants, EV; Belyanin, DK; Kolpakov, VV; Bogush, AA; (2017) Colloform high-purity platinum from the placer deposit of Koura River (Gornaya Shoriya, Russia). Ore Geology Reviews , 91 pp. 236-245. 10.1016/j.oregeorev.2017.10.003. Green open access

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Abstract

A microinclusion of colloform high-purity platinum in a grain of platinum-group minerals (PGM) from the alluvial gold-bearing placer deposit in the south of Western Siberia (Russia) was detected and characterized for the first time. It is different in composition, texture, and conditions of formation from high-purity platinum of other regions described in the literature. The main characteristics of investigated high-purity platinum are colloform-layered texture, admixture of Fe (0.37–0.78 wt%), and paragenesis of Cu-rich isoferroplatinum, hongshiite, and rhodarsenide. The PGM grain with high-purity platinum is multiphase and heterogeneous in texture. It is a product of intensive metasomatic transformation of Cu-rich isoferroplatinum (Pt3(Fe0.6Cu0.4)). The transformation was carried out in two stages: 1 – copper stage including three substages (Cu-rich isoferroplatinum, copper platinum and hongshiite); and 2 – arsenic (rhodarsenide). The formation of high-purity platinum was separated in time from the formation of isoferroplatinum and was carried out by precipitation from postmagmatic solutions.

Type: Article
Title: Colloform high-purity platinum from the placer deposit of Koura River (Gornaya Shoriya, Russia)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.oregeorev.2017.10.003
Publisher version: http://dx.doi.org/10.1016/j.oregeorev.2017.10.003
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Geology, Mineralogy, Mining & Mineral Processing, Platinum-group elements (PGE), Platinum-group minerals (PGM), High-purity platinum, Cu-rich isoferroplatinum, Hongshiite, Alluvial placer, Gornaya Shoriya, GROUP MINERALS, MINAS-GERAIS, GROUP ELEMENTS, FAR-EAST, MINERALIZATION, BRAZIL, PALLADIUM, RICH, SOLUBILITY, TRANSPORT
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10059823
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