THE FIRST FIND OF CAMBRIAN VOLCANITES AND PLAGIOGRANITES IN TEKTURMAS OPHIOLITE ZONE (CENTRAL KAZAKHSTAN): AGE AND COMPOSITION

К. Е. Degtyarev; Дегтярев К. Е.; М. V. Luchitskaya; Лучицкая М. В.; А. А. Тretyakov; Третьяков А. А.

doi:10.31857/S2686739723601291

THE FIRST FIND OF CAMBRIAN VOLCANITES AND PLAGIOGRANITES IN TEKTURMAS OPHIOLITE ZONE (CENTRAL KAZAKHSTAN): AGE AND COMPOSITION

Authors: Degtyarev К.Е.¹, Luchitskaya М.V.¹, Тretyakov А.А.¹
Affiliations:
1. Geological Institute Russian Academy of Sciences
Issue: Vol 513, No 1 (2023)
Pages: 17-25
Section: GEOLOGY
Submitted: 30.01.2025
Published: 01.11.2023
URL: https://rjmseer.com/2686-7397/article/view/649782
DOI: https://doi.org/10.31857/S2686739723601291
EDN: https://elibrary.ru/LUMZRE
ID: 649782

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Abstract

The complex of felsic rocks, intruded by plagiogranitic bodies are first revealed in the west of the Tekturmas ophiolite zone of Central Kazakhstan. The U–Pb (SIMS) geochronological study of one of the plagiogranitic bodies was carried out and the Early Cambrian age (537 ± 5 Ma) was first obtained. The peculiarities of effusives and plagiogranites composition indicate their formation in the supra-subduction setting within primitive volcanic island arc. Formation of this arc was not related to the evolution of the oceanic structures, which complexes participate in the structure of the Tekturmas zone.

Keywords

island arc volcanites and plagiogranites, zircon, Early Cambrian, Central Kazakhstan

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