Paleomagnetism of the Permian–Triassic Siberian Traps Intrusions from the Kulumbe River Valley, Northwestern Siberian Platform

Autor: Roman Veselovskiy, A. A. Lapkovskii, Anton Latyshev, A. M. Fetisova, Nadezhda Krivolutskaya
Rok vydání: 2021
Předmět:
Zdroj: Izvestiya, Physics of the Solid Earth. 57:375-394
ISSN: 1555-6506
1069-3513
Popis: —The Kulumbe River area occupies a transitional position in the Siberian Traps province due to being located in the junction zone of the structures of the Norilsk region and the Tunguska syncline. The Kulumbe river valley combines the characteristic volcanic formations of both regions; however, the sequence of the formation of the intrusive complexes and their correlation with the volcanics are still unclear. The paper presents new paleomagnetic data on the intrusive bodies of the Kulumbe river valley. It is shown that intrusive magmatism in the region continued for a long time spanning at least one interval of the reversed polarity and one interval of normal polarity. Based on the comparison of virtual geomagnetic poles, the Siluriyskaya intrusion (Norilsk complex) containing sulfide mineralization can be correlated to the Morongovskaya-Mokulaevskaya (Morongovsky-Mokulaevsky) formations and close to the formation time of the ore-bearing intrusions of the Norilsk region. The formation of the Kulyumbinskaya intrusion (Kureyskii (Kureysky) complex) and some other bodies of the Kureyskii and Kuzmovskii (Kuzmovsky) complexes is most likely to correspond to the Morongovskaya-Mokulaevskaya (Morongovsky-Mokulaevsky) time and also is close to the formation time of the ore-bearing intrusions. The reversely magnetized intrusive bodies in the Kulumbe River valley were formed after the completion of the main volcanic phase and are approximately synchronous with the Daldykan complex in the Norilsk region. The formation of the Katangskii (Katangsky) intrusions, just as in the central part of the Tunguska syncline, spans a long period of time and cannot be correlated to any particular volcanic formation. Finally, based on the detailed analysis of the paleomagnetic data we hypothesize that most of the intrusions of the Kulumbe River valley except for part of the reversely magnetized bodies have been formed before the end of the main regional deformations which roughly coincides with the termination of trap magmatism.
Databáze: OpenAIRE
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