Formation of the Late Cenozoic volcanic complexes of the Lesser Caucasus


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Abstract

The paper considers the role of the lithospheric mantle and asthenosphere during the Late Cenozoic collision volcanism of the Lesser Caucasus. The results of petrogeochemical studies show that the products of volcanism of the West Volcanic Zone of Armenia and the calc-alkaline andesite–dacite–rhyodacite complex of the Neogene Kelbadzhar and Karabakh plateaus were formed from an enriched source in a suprasubduction setting. Late Pliocene–Quaternary moderately alkaline and alkaline volcanic rocks of the Lesser Caucasus differ in petrogeochemistry from suprasubduction volcanic rocks. In trace element contents and patterns, they are similar to rocks formed from an enriched mantle source. Comparative analysis of the geological and geophysical data suggests the model of lithospheric slab break-off of the thickened lithosphere as the triggering mechanism for Late Cenozoic magmatism of the Lesser Caucasus.

About the authors

N. A. Imamverdiyev

Baku State University

Author for correspondence.
Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1148

V. M. Baba-zade

Baku State University

Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1148

A. E. Roman’ko

Geological Institute

Email: nimamverdyev@bsu.edu.az
Russian Federation, Moscow, 119017

Sh. F. Abdullaeva

Baku State University

Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1148

M. Ya. Gasangulieva

Institute of Geology and Geophysics

Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1073

G. D. Babaeva

Institute of Geology and Geophysics

Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1073

A. A. Veliev

Azerbaijan International Ore Company

Email: nimamverdyev@bsu.edu.az
Azerbaijan, Baku, AZ1073

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