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Ontogeny of ore Cr-spinel and composition of inclusions as indicators of the pneumatolytic–hydrothermal origin of PGM-bearing chromitites from Kondyor massif, the Aldan Shield

Citation

Pushkarev, EV and Kamenetsky, VS and Morozova, AV and Khiller, VV and Glavatskykh, SP and Rodemann, T, Ontogeny of ore Cr-spinel and composition of inclusions as indicators of the pneumatolytic-hydrothermal origin of PGM-bearing chromitites from Kondyor massif, the Aldan Shield, Geology of Ore Deposits, 57, (5) pp. 352-380. ISSN 1075-7015 (2015) [Refereed Article]

Copyright Statement

© Pleiades Publishing, Ltd., 2015. Original Russian Text © E.V. Pushkarev, V.S. Kamenetsky, A.V. Morozova, V.V. Khiller, S.P. Glavatskykh, T. Rodemann, 2015, published in Geologiya Rudnykh Mestorozhdenii,2015, Vol. 57, No. 5, pp. 394–423.

DOI: doi:10.1134/S1075701515050049

Abstract

The thoroughly studied ontogeny and chemical composition of ore Cr-spinel from PGM-bearing chromitites of the Kondyor clinopyroxenite–dunite massif in the Aldan Shield show that this mineral crystallizes jointly with relatively low-temperature minerals: Cr-diopside, amphiboles, phlogopite, chlorite, serpentine, apatite, etc. Induction surfaces between Cr-spinel and silicates of the ore matrix are established. The ore Cr-spinel contains a great number of octahedral carbonic fluid and silicate inclusions, as well as octahedral gold and serpentine aggregates. These data, along with the relationships of Cr-spinel with low-temperature silicates, are evidence for the pneumatolytic–hydrothermal origin of Cr-spinel in Cr–PGE ore. Chromitite is a contrasting and nonequilibrium system with respect to host dunite in both chemical compositions of minerals and formation conditions in agreement with the concept of the epigenetic nature of chromitite stated more a century ago by A.N. Zavaritsky and A.G. Betekhtin.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Primary Mining and Extraction Processes of Mineral Resources
Objective Field:Mining and Extraction of Precious (Noble) Metal Ores
Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
Author:Rodemann, T (Dr Thomas Rodemann)
ID Code:104295
Year Published:2015
Web of Science® Times Cited:5
Deposited By:Earth Sciences
Deposited On:2015-11-07
Last Modified:2017-10-30
Downloads:0

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