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Discussion: 'Xenoliths in ultrapotassic volcanic rocks in the Lhasa block: direct evidence for crust-mantle mixing and metamorphism in the deep crust' by Wang et al. 2016 (Contributions to Mineralogy and Petrology) 171:62

Citation

Stepanov, AS and Campbell, I and Rapp, RP and Lowczak, J and Korsakov, AV, Discussion: 'Xenoliths in ultrapotassic volcanic rocks in the Lhasa block: direct evidence for crust-mantle mixing and metamorphism in the deep crust' by Wang et al. 2016 (Contributions to Mineralogy and Petrology) 171:62, Contributions to Mineralogy and Petrology, 172 Article 19. ISSN 0010-7999 (2017) [Contribution to Refereed Journal]

Copyright Statement

Copyright 2017 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s00410-017-1332-6

Abstract

Wang et  al. (Contrib Mineral Petrol 171:62, 2016a) present data on composition of xenolith from Southern Tibet and conclude that ulrapotassic melts from the region formed by melting mantle, and complex interaction with a crustal component. In this discussion we demonstrate that numerous observations presented by Wang et al. (2016a) can be explained by partial melting of crust followed by interaction between that melt and the mantle. We show that this model can explain the variability of magmas in such suits without evoking occurrence of coincidental, unrelated events. Moreover we demonstrate that our model of a crustal origin of the proto-shoshonite melts is now supported by independent lines of evidence such as geochemistry of restites after high- and ultrahigh- pressure melting and melt inclusion studies.

Item Details

Item Type:Contribution to Refereed Journal
Keywords:shoshonite, magmatism, ultrapotassic magmas, shoshonite, xenolith, crust-mantle interaction
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Stepanov, AS (Mr Sasha Stepanov)
ID Code:125780
Year Published:2017
Web of Science® Times Cited:1
Deposited By:CODES ARC
Deposited On:2018-05-04
Last Modified:2018-12-13
Downloads:0

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