The first find of spinel peridotite in the Southern Kazakhstan: Structure, composition, and parameters of high-pressure metamorphism

Spinel peridotite, metamorphosed in high-pressure conditions, was first described within the Western part of the Central Asian Orogenic Belt. The spinel peridotite has the characteristics of Mg–Cr ultramafites indicating the mantle origin of its protolith. The preliminary estimation of the metamorph...

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Bibliographic Details
Published in:Doklady earth sciences 2017-09, Vol.476 (1), p.982-985
Main Authors: Pilitsyna, A. V., Tretyakov, A. A., Alifirova, T. A., Degtyarev, K. E., Kovalchuk, E. V.
Format: Article
Language:English
Subjects:
Aluminum oxide
Chromium oxides
Composition
Earth and Environmental Science
Earth Sciences
Geology
High pressure
Mantle (Geology)
Metamorphic rocks
Metamorphism
Metamorphism (Geology)
Minerals
Peridotite
Pressure
Silicon dioxide
Spinel
Spinel group
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Summary:Spinel peridotite, metamorphosed in high-pressure conditions, was first described within the Western part of the Central Asian Orogenic Belt. The spinel peridotite has the characteristics of Mg–Cr ultramafites indicating the mantle origin of its protolith. The preliminary estimation of the metamorphism peak for the model system MgO–Al 2 O 3 —SiO 2 –Cr 2 O 3 (MASCr) is 10–19 kbar at 680–800°C.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X17090069