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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
journal contribution
posted on 2023-05-22, 03:28 authored by Stepanov, AS, Campbell, I, Rapp, RP, Lowczak, J, Korsakov, AVWang 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.
History
Publication title
Contributions to Mineralogy and PetrologyVolume
172Article number
19Number
19Pagination
1-4ISSN
0010-7999Department/School
School of Natural SciencesPublisher
Springer-VerlagPlace of publication
175 Fifth Ave, New York, USA, Ny, 10010Rights statement
Copyright 2017 Springer-Verlag Berlin HeidelbergRepository Status
- Restricted