Research

EPSL: Late Triassic paleomagnetic results of the Nanqiangtang block reveal the late evolution history of the ancient Tethys Ocean

Article source: Release time:2025-05-20 15:57 Author: Views:44 Automatic translation:yes

The Kimmeri Block is a belt shaped continent that split off from the northeastern edge of the Gondwana continent in the southern hemisphere. After undergoing a complex northward drift process, it collided with the southern edge of the Eurasian continent in the northern hemisphere during the Mesozoic era. In this process, the Kimmeri Land Block played a key role in separating the ancient Tethys Ocean and the new Tethys Ocean, and its kinematic process is of great significance for a deeper understanding of major scientific issues such as the evolution of the Tethys tectonic domain and the formation of the Qinghai Tibet Plateau. However, paleomagnetic and paleontological evidence from different blocks of the Kimmeri Land Group suggests that the movement speeds of each block may not be the same during the northward movement of the Kimmeri Land Group. Specifically, the movement speed in the middle section may be faster than that of the Dian Mian Ma Tai block and the Iran block on the east and west sides (e.g. Angiolini et al., 2013); Muttoni et al., 2009). The Nanqiangtang block is an important component of the middle section of the Jimei Land Group, occupying a pivotal position in the east-west Tethys tectonic domain and the north-south Qinghai Tibet Plateau fusion system. Therefore, accurately determining the drift history of the Nanqiangtang block is of crucial significance for revealing the opening and closing mechanism of the Tethys Ocean and the multi-stage accretion process of the southern margin of the Eurasian continent.