TY - JOUR

T1 - New Evidence of the Independent Precambrian Tectonic History of the Faddey Terrane of the Central Taimyr Accretionary Belt

AU - Matushkin, N. Yu

AU - Metelkin, D. V.

AU - Vernikovsky, V. A.

AU - Proskurnin, V. F.

AU - Abashev, V. V.

AU - Larionov, A. N.

AU - Petrushkov, B. S.

N1 - This work was supported by the Russian Science Foundation (grants no. 19-17-00091-П and 21-17-00052). Публикация для корректировки.

PY - 2023/8

Y1 - 2023/8

N2 - New geostructural, petro-geochemical, U–Pb geochronological and paleomagnetic data for sills of metagabbro-dolerites of the Severobyrranga 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.

AB - New geostructural, petro-geochemical, U–Pb geochronological and paleomagnetic data for sills of metagabbro-dolerites of the Severobyrranga 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.

KW - Central Taimyr accretionary belt

KW - Faddey terrane

KW - Kara orogen

KW - Siberian Arctic margin

KW - geochronology

KW - paleomagnetism

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85163744925&origin=inward&txGid=3e06f260138a8bb8915fb42f260ac724

UR - https://www.mendeley.com/catalogue/7dbc53bf-2f96-3a05-b50f-5bae3cf967d6/

U2 - 10.1134/S1028334X2360086X

DO - 10.1134/S1028334X2360086X

M3 - Article

VL - 511

SP - 636

EP - 644

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

ER -