TY - JOUR

T1 - Colloform high-purity platinum from the placer deposit of Koura River (Gornaya Shoriya, Russia)

AU - Nesterenko, G. V.

AU - Zhmodik, S. M.

AU - Airiyants, E. V.

AU - Belyanin, D. K.

AU - Kolpakov, V. V.

AU - Bogush, A. A.

N1 - Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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.

AB - 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.

KW - Alluvial placer

KW - Cu-rich isoferroplatinum

KW - Gornaya Shoriya

KW - High-purity platinum

KW - Hongshiite

KW - Platinum-group elements (PGE)

KW - Platinum-group minerals (PGM)

UR - http://www.scopus.com/inward/record.url?scp=85031429543&partnerID=8YFLogxK

U2 - 10.1016/j.oregeorev.2017.10.003

DO - 10.1016/j.oregeorev.2017.10.003

M3 - Article

AN - SCOPUS:85031429543

VL - 91

SP - 236

EP - 245

JO - Ore Geology Reviews

JF - Ore Geology Reviews

SN - 0169-1368

ER -