Role of Crust Contamination in the Early Cretaceous Magmatism of the Western Trans-Baikal Rifting Area

The paper provides results on the isotope (Sr, Nd and O) study of volcanic rock composition performed for the Uda sector of the Western Trans-Baikal rifting area. This investigation made it feasible to evaluate the mantle melt/environment interaction, which affected the composition of Late Cretaceous (83-70 Ma) volcanics. Their geochemical and isotope characteristics represent evidence that, they were derived from moderately-enriched mantle having the composition close to that of OIB sources. The Early Cretaceous rocks formed from the mantle sources including the subduction-enriched mantle. When moving to the surface, the initial magma of the Uda complex (131-111 Ma) was contaminated with the substance of the lower crust. Magmas of the Zazinsky complex (143-135 Ma) bear the features of interaction with the upper crust granitoids of the Angara-Vitim batholith.

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15.10.2018

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16.10.2018

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877

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MLA	Komaritsyna, Т, Yarmolyuk, V., Vorontsov, А "Role of Crust Contamination in the Early Cretaceous Magmatism of the Western Trans-Baikal Rifting Area." Doklady Akademii nauk 481.3 (2018):305-309. DOI: 10.31857/S086956520001384-5
APA	Komaritsyna Т., Yarmolyuk V., Vorontsov А. (2018). Role of Crust Contamination in the Early Cretaceous Magmatism of the Western Trans-Baikal Rifting Area. Doklady Akademii nauk 481(3), pp.305-309 DOI: 10.31857/S086956520001384-5

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