NEW EVIDENCE OF THE INDEPENDENT PRECAMBRIAN TECTONIC HISTORY OF THE FADDEY TERRANE OF THE CENTRAL TAIMYR ACCRETIONARY BELT-Reference-Cited by-同舟云学术

NEW EVIDENCE OF THE INDEPENDENT PRECAMBRIAN TECTONIC HISTORY OF THE FADDEY TERRANE OF THE CENTRAL TAIMYR ACCRETIONARY BELT

Published:2023-08-01 Issue:2 Volume:511 Page:149-158
ISSN:2686-7397
Container-title:Доклады Российской академии наук. Науки о Земле
language:
Short-container-title:Doklady Rossijskoj akademii nauk. Nauki o Zemle

Author:

Matushkin N. Yu.¹²,Metelkin D. V.²¹,Vernikovsky V. A.¹²,Proskurnin V. F.³,Abashev V. V.¹²,Larionov A. N.³,Petrushkov B. S.⁴

Affiliation:

1. Trofimuk Institute of Petroleum Geology and Geophysics SB RAS

2. Novosibirsk State University

3. A.P. Karpinsky Russian Geological Research Institute

4. Nornickel Technical Services LLC

Abstract

New geostructural, petro-geochemical, U-Pb geochronological and paleomagnetic data for sills of metagabbro-dolerites of the Severnobyrranga and Yasnenskiy complex specify the paleotectonic position of the Faddey terrane of the Central Taimyr accretionary belt. The structural position of the sills in the rocks of the Oktyabr and Zhdanov formations is indicative of their intrusion before deformations caused by the accretion of the Central Taimyr belt. The U-Th-Pb age of crystallization for the metagabbro-dolerites has been established as 1357 ± 9 Ma. The primary paleomagnetic record reflecting the time of intrusion has not been preserved, but two metachronous components have been identified. The first one corresponds to crust formation processes at ca. 840 Ma due to collision, probably of continent – island arc type involving the cratonic block that included the Faddey and Mamont-Shrenk terranes. These collisional events took place several hundreds of kilometers from the Siberian margin. The second component corresponds to thermal events on the Paleozoic-Mesozoic boundary and reflects the strike-slip deformation in the Kara orogen.

Publisher

The Russian Academy of Sciences

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