Quaternary adakite—Nb-enriched basalt association in the western Trans-Mexican Volcanic Belt: is there any slab melt evidence?

A spatial and temporal association between adakitic rocks and Nb-enriched basalts (NEB) is recognised for the first time in the western sector of the Trans-Mexican Volcanic Belt in the San Pedro–Cerro Grande Volcanic Complex (SCVC). The SCVC is composed of subalkalic intermediate to felsic rocks, sp...

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Bibliographic Details
Published in:Contributions to mineralogy and petrology 2008-07, Vol.156 (1), p.73-86
Main Authors: Petrone, Chiara M., Ferrari, Luca
Format: Article
Language:English
Subjects:
Basalt
Earth and Environmental Science
Earth Sciences
Fractionation
Geology
Melting
Mineral Resources
Mineralogy
Original Paper
Petrology
Quaternary
Rocks
Silica
Titanium dioxide
Volcanic belts
Volcanoes
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Summary:A spatial and temporal association between adakitic rocks and Nb-enriched basalts (NEB) is recognised for the first time in the western sector of the Trans-Mexican Volcanic Belt in the San Pedro–Cerro Grande Volcanic Complex (SCVC). The SCVC is composed of subalkalic intermediate to felsic rocks, spanning in composition from high-silica andesites to rhyolites, and by the young transitional hawaiite and mugearite lavas of Amado Nervo shield volcano. Intermediate to felsic rocks of the SCVC show many geochemical characteristics of typical adakites, such as high Sr/Y ratios (up to 180) and low Y (
ISSN:0010-7999
1432-0967
DOI:10.1007/s00410-007-0274-9