GRANODIORITES OF OLEKMINSKY COMPLEX OF THE EASTERN TRANSBAIKALIA: U-Pb LA-ICP-MS ZIRCONS GEOCHRONOLOGY AND AGE POSITION OF COMPLEX-Reference-Cited by-同舟云学术

GRANODIORITES OF OLEKMINSKY COMPLEX OF THE EASTERN TRANSBAIKALIA: U-Pb LA-ICP-MS ZIRCONS GEOCHRONOLOGY AND AGE POSITION OF COMPLEX

Published:2024-02-16 Issue:1 Volume:15 Page:0740
ISSN:2078-502X
Container-title:Geodynamics & Tectonophysics
language:
Short-container-title:Geodin. tektonofiz.

Author:

Dril S. I.¹,Kovach V. P.²,Kotov А. В.²,Wang K.-L.³,Larin А. М.²,Iizuka Y.⁴,Lee H.-Y.⁴

Affiliation:

1. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences

2. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences

3. Institute of Earth Sciences, Academia Sinica; National Taiwan University

4. Institute of Earth Sciences, Academia Sinica

Abstract

The palingenic calc-alkaline granitoid massifs of the Olekminsky complex form a magmatic belt stretching within the Western-Stanovoy terrane in the northeastern direction for more than 700 km. New U-Pb LA-ICP-MS dates for zircons from the granodiorites of the Marekta-Bereinsky massif of the Olekminsky complex and the granodiorites of the Yamninsky massif of the Krestovsky complex were obtained, amounting to 371±4 Ma and 364±5 Ma, respectively. These geochronological data are well consistent with the 355–358 Ma ones, therefore suggesting the Late Carboniferous age of quartz-diorite-granodiorite-granite rocks of the Olekminsky complex. However, these dates are not correlated with the existing legends of geological maps covering the area of the Western-Stanovoy structural-formation zone or the Western-Stanovoy terrane, as the intrusive formations of the Olekminsky complex are dated as the Early Paleozoic. In addition, new geochronological data call into question distinguishing of a separate Early Paleozoic Krestovsky granitoid complex.

Publisher

Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences

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