TY - JOUR

T1 - Sulfide-Bearing Polymineralic Inclusions in Mantle-Derived Garnets from Lamprophyres of the Chompolo Field (Central Aldan, Siberian Craton)

AU - Nikolenko, E. I.

AU - Sharygin, I. S.

AU - Rezvukhin, D. I.

AU - Malkovets, V. G.

AU - Tychkov, N. S.

AU - Pokhilenko, N. P.

N1 - Funding Information: Analytical studies were supported by the Russian Science Foundation, project no. 18-77-10062 (SEM, EPMA, RS) and no. 18-17-00249 (LA-ICP-MS). Field work and sampling were supported by a State Assignment of the Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences. Handpicking of garnet samples with mineral inclusions was supported by the President of the Russian Federation, grant no. МК-971.2020.5. Publisher Copyright: © 2021, Pleiades Publishing, Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/4

Y1 - 2021/4

N2 - Sulfide-bearing polymineralic inclusions in mantle-derived chromium pyrope garnets of lherzolite paragenesis from lamprophyres of the Chompolo field (Aldan shield, southern Siberian craton) have been studied. The inclusions are composed of either only sulfides or sulfides in association with other minerals (carbonates, silicates, oxides, etc.). The sulfide part of the inclusions is represented by up to four minerals. Among the sulfides, minerals rich in Cu and Ni have been found, whereas Fe sulfides (pyrrhotite, troilite) are absent. This distinguishes the inclusions studied from the majority of sulfide inclusions in mantle minerals and diamonds, as well as in mantle xenoliths from kimberlites. The formation of polymineralic inclusions in chromium garnets of the Chompolo field is attributed to the effect of a carbonate–silicate metasomatic melt/fluid on mantle peridotites, as evidenced by the mineral suite associated with the sulfides. The research results indicate significant differences in the nature of metasomatic processes that occurred in the lithospheric mantle of the southern and central parts of the Siberian craton.

AB - Sulfide-bearing polymineralic inclusions in mantle-derived chromium pyrope garnets of lherzolite paragenesis from lamprophyres of the Chompolo field (Aldan shield, southern Siberian craton) have been studied. The inclusions are composed of either only sulfides or sulfides in association with other minerals (carbonates, silicates, oxides, etc.). The sulfide part of the inclusions is represented by up to four minerals. Among the sulfides, minerals rich in Cu and Ni have been found, whereas Fe sulfides (pyrrhotite, troilite) are absent. This distinguishes the inclusions studied from the majority of sulfide inclusions in mantle minerals and diamonds, as well as in mantle xenoliths from kimberlites. The formation of polymineralic inclusions in chromium garnets of the Chompolo field is attributed to the effect of a carbonate–silicate metasomatic melt/fluid on mantle peridotites, as evidenced by the mineral suite associated with the sulfides. The research results indicate significant differences in the nature of metasomatic processes that occurred in the lithospheric mantle of the southern and central parts of the Siberian craton.

KW - Aldan shield

KW - mantle

KW - metasomatism

KW - mineral inclusions

KW - peridotite

KW - pyrope

KW - Siberian craton

KW - sulfides

UR - http://www.scopus.com/inward/record.url?scp=85105119266&partnerID=8YFLogxK

U2 - 10.1134/S1028334X21040115

DO - 10.1134/S1028334X21040115

M3 - Article

AN - SCOPUS:85105119266

VL - 497

SP - 300

EP - 304

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

ER -