Stages of granitoid magmatism in the eastern part of the Kazakhstan composite continent in the early-middle paleozoic

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Abstract

For the northeastern part of the Chingiz-Tarbagatai segment of the Boshchekul-Chingiz folded area, U-Pb age estimates of Middle Paleozoic granitoid complexes were obtained for the first time, and their geochemical features were described. New data indicate a wide distribution of Late Silurian granitoids, represented by I-type rocks, in this territory. Early Devonian rocks form a number of separate volcano-plutonic structures, the granitoids of which can be classified as A-type. The compositional features of granitoids formed during the Cambrian-Devonian allow us to trace the evolution of the crust of this part of the Chingiz-Tarbagatai segment from an ensimatic island arc to a volcanic belt with relatively mature continental-type crust.

About the authors

P. D. Kotler

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Kazan Federal University

Author for correspondence.
Email: pkotler@igm.nsc.ru
Russian Federation, Novosibirsk; Kazan

S. V. Khromykh

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: pkotler@igm.nsc.ru
Russian Federation, Novosibirsk

K. E. Degtyarev

Geological Institute of the Russian Academy of Sciences

Email: pkotler@igm.nsc.ru

Academician of the RAS

Russian Federation, Moscow

A. V. Kulikova

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Kazan Federal University

Email: pkotler@igm.nsc.ru
Russian Federation, Novosibirsk; Kazan

M. D. Tsareva

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: pkotler@igm.nsc.ru
Russian Federation, Novosibirsk

V. A. Penkina

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: pkotler@igm.nsc.ru
Russian Federation, Novosibirsk

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