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Petrology : Volume 19, Issue 3, May 2011

Petrology : Volume 19, Issue 2, March 2011

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Petrology : Volume 17

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Petrology : Volume 14

Late Cenozoic volcanic province in Central and East Asia

Content Provider	Springer Nature Link
Author	Yarmolyuk, V. V. Kudryashova, E. A. Kozlovskyi, A. M. Savatenkov, V. M.
Copyright Year	2011
Abstract	The paper presents materials on the inner structure of the Late Cenozoic within-plate volcanic province in Central and East Asia, in which two subprovinces are distinguished: Central Asian and Far Eastern, which comprise a number of autonomously evolving volcanic areas. Some of the volcanic areas are proved to have evolved for a long time, starting in the Late Mesozoic. In spite of differences in their age and structural setting, the volcanic areas evolved according to similar scenarios in the Late Cenozoic. Magmatism in the province was related to a mantle source of the within-plate type. The magmatic associations are dominated by mafic alkaline high-K rocks. The rocks are geochemically close to basalts of the OIB type, and their isotopic composition corresponds to a combination of mantle sources of the PREMA, EMI, and EMII types at the predominance of PREMA. Geological, geochemical, and isotopic lines of evidence suggest that magmatism in the province was related to mantle plumes. This is consistent with geophysical data, which testify that the volcanic areas are underlain by upwellings of the asthenospheric mantle or plumes. Seismic tomography data indicate that the “stems” of the plumes can be traced down to the upper and lower mantle. The province is thought to have been produced when the eastern margin of the Asian plate overlapped one of the branches of the Pacific superplume at approximately 160 Ma. This branch of the superplume is pronounced in the modern mantle structure as a cluster of mantle plumes that control (according to seismic tomography data) the interaction zone of the Pacific and Asian lithospheric plates.
Starting Page	327
Ending Page	347
Page Count	21
File Format	PDF
ISSN	08695911
Journal	Petrology
Volume Number	19
Issue Number	4
e-ISSN	15562085
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-07-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geochemistry Mineralogy
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

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