The Mesozoic apparent polar wander path for the Siberian domain of the Eurasian plate

Autor: Dmitry V. Metelkin, V.A. Kashirtsev, A. Yu. Kazansky, V. Yu. Bragin, L. V. Kungurtsev, Valery A. Vernikovsky
Rok vydání: 2008
Předmět:
Zdroj: Doklady Earth Sciences. 418:62-67
ISSN: 1531-8354
1028-334X
DOI: 10.1134/s1028334x08010145
Popis: Comparison of the apparent polar wander paths (APWP) is one of the most important tasks in recent paleomagnetic study. The reliability of such trajectories is largely determined by the quality and quantity of paleomagnetic data used for their construction and uniformity of distribution of these data along the APWP. Approximately 400 paleomagnetic determinations largely characterizing the Paleozoic are now available for East Siberia. The basic features of the present-day structure of northern Eurasia were formed by the end of the Paleozoic. This fact served as a basis for construction of the so-called synthetic APWP for the Eurasian continent, according to which the latter is considered as a single rigid block in the Mesozoic‐Cenozoic [1, 2]. Though paradoxical, Mesozoic strata of Siberia, except for the Lower Triassic, are insufficiently studied by the paleomagnetic method. The paleomagnetic study of Mesozoic rocks in Siberia were largely aimed at solution of stratigraphic problems, which do not need high accuracy in determination of paleomagnetic poles. Despite their reliability, such data are unsuitable for solution of tectonic tasks. The main weakness of available determinations is related to the lack of paleomagnetic tests and wide age ranges (sometimes >50 (!) Ma) obtained for paleomagnetic poles. Therefore, paleomagnetic data on Europe and China [1, 2] were used to calculate the latitudinal position and spatial orientation of the Siberian tectonic domain of the Eurasian Plate in the Mesozoic‐Early Cenozoic. At the same time, the analysis of the geological structure and paleomagnetic data available for Siberia, East Europe, and Central Asia indicates that such constructions are inconsistent
Databáze: OpenAIRE
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