Geodynamic Significance of the Mesoproterozoic Magmatism of the Udzha Paleo-Rift (Northern Siberian Craton) Based on U-Pb Geochronology and Paleomagnetic Data

• Main Authors: Sergey V. Malyshev, Aleksander M. Pasenko, Alexei V. Ivanov, Dmitrii P. Gladkochub, Valery M. Savatenkov, Sebastien Meffre, Adam Abersteiner, Vadim S. Kamenetsky, Vasiliy. D. Shcherbakov
• Format: Article
• Language: English
• Published: MDPI AG 2018-11-01
• Series: Minerals
• Subjects: U-Pb geochronology; apatite; basalts; proterozoic; Siberia; paleomagnetism; paleoreconstruction
• Online Access: https://www.mdpi.com/2075-163X/8/12/555
• ISSN: 2075-163X

The emplacement age of the Great Udzha Dyke (northern Siberian Craton) was determined by the U-Pb dating of apatite using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). This produced an age of 1386 ± 30 Ma. This dyke along with two other adjacent intrusions, which cross-cut the sedimentary units of the Udzha paleo-rift, were subjected to paleomagnetic investigation. The paleomagnetic poles for the Udzha paleo-rift intrusions are consistent with previous results published for the Chieress dyke in the Anabar shield of the Siberian Craton (1384 ± 2 Ma). Our results suggest that there was a period of intense volcanism in the northern Siberian Craton, as well as allow us to reconstruct the apparent migration of the Siberian Craton during the Mesoproterozoic.