TY - JOUR

T1 - PGE-Cu-Ni mineralization of mafic-ultramafic massifs of the Khangai Upland, Western Mongolia

AU - Shapovalova, Maria

AU - Tolstykh, Nadezhda

AU - Shelepaev, Roman

AU - Kalugin, Valery

N1 - Funding Information: Funding: The studies were carried out within the framework of the state assignment of the V.S. Sobolev Institute of Geology and Mineralogy of Siberian Branch of Russian Academy of Sciences financed by Ministry of Science and Higher Education of the Russian Federation. The reported study was funded by RFBR, project number 19-35-90033. Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11

Y1 - 2020/11

N2 - The mafic-ultramafic massifs with the PGE-Cu-Ni mineralization located in North-Central Mongolia: Oortsog, Dulaan, Mankhan, Yamat, and Nomgon were investigated. For the first time we consider these massifs as a single magmatic association and as fragments of Khangai batholith caused by the action of the plume responsible for the formation Permian Khangai LIP. The massifs fractionated from peridotite to gabbro have a similar typomorphic ore mineralogical and geochemical features, which change depending on the degrees of fractionation of magma and evolution of the sulfide melt. The least fractionated Oortsog massif originated from Ni-rich high- Mg basaltic magma. It is characterized by predominance of pyrrhotite mineralization due to exsolution of monosulfide solid solution (MSS). The most fractionated is the Nomgon massif originated from Cu-rich basaltic magma with bornite-chalcopyrite mineralization, formed as an exsolution of intermediate solid solution (ISS). The rest of the massifs have a medium characteristics between these two. The compositions of sulfides in the studied massifs change in accordance with the increase in sulfur fugacity from peridotite to gabbro: enrichment of pentlandite in Ni and pyrrhotite in S. The composition of PGM changes from Pt minerals in Oortsog massif to Pd minerals in Nomgon massif in the same direction. These massifs can be considered as potential for the PGE.

AB - The mafic-ultramafic massifs with the PGE-Cu-Ni mineralization located in North-Central Mongolia: Oortsog, Dulaan, Mankhan, Yamat, and Nomgon were investigated. For the first time we consider these massifs as a single magmatic association and as fragments of Khangai batholith caused by the action of the plume responsible for the formation Permian Khangai LIP. The massifs fractionated from peridotite to gabbro have a similar typomorphic ore mineralogical and geochemical features, which change depending on the degrees of fractionation of magma and evolution of the sulfide melt. The least fractionated Oortsog massif originated from Ni-rich high- Mg basaltic magma. It is characterized by predominance of pyrrhotite mineralization due to exsolution of monosulfide solid solution (MSS). The most fractionated is the Nomgon massif originated from Cu-rich basaltic magma with bornite-chalcopyrite mineralization, formed as an exsolution of intermediate solid solution (ISS). The rest of the massifs have a medium characteristics between these two. The compositions of sulfides in the studied massifs change in accordance with the increase in sulfur fugacity from peridotite to gabbro: enrichment of pentlandite in Ni and pyrrhotite in S. The composition of PGM changes from Pt minerals in Oortsog massif to Pd minerals in Nomgon massif in the same direction. These massifs can be considered as potential for the PGE.

KW - Geochemistry

KW - Khangai upland

KW - LIP

KW - Mineralogy

KW - PGE-Cu-Ni

KW - PGMs

KW - Sulfide

KW - MANTLE PLUMES

KW - GROUP MINERALS

KW - geochemistry

KW - SULFIDE MINERALIZATION

KW - mineralogy

KW - ARSENIDE ORES

KW - CONTINENTAL-CRUST

KW - PLATINUM-GROUP ELEMENTS

KW - GIANT BATHOLITHS

KW - PHASE-RELATIONS

KW - sulfide

KW - BATHOLITH FORMATION

KW - ASIAN OROGENIC BELT

UR - http://www.scopus.com/inward/record.url?scp=85094596482&partnerID=8YFLogxK

U2 - 10.3390/min10110942

DO - 10.3390/min10110942

M3 - Article

AN - SCOPUS:85094596482

VL - 10

SP - 1

EP - 26

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 11

M1 - 942

ER -