Space Geodesy in Geodynamic Studies:Recent Movements in the Zeya—Bureya Basin

摘要

The Amur–Zeya geodynamic test ground was set up in 2000 to study recent intracontinental crustaldeformations. The velocity field calculations for the period of 2000 to 2003 describe three movements scales.The general level is characterized by the vectors of IGS sites in the eastern part of Asia, the BLAG (Blagovesh-chensk) site included. The southeast movement of the IRKT (Irkutsk) site of the stable Siberian Platform isindicative of deformations in the northeastern part of the Amur Plate. Measurement data on the regional near-latitudinal profile Blagoveshchensk–Sutara, which crosses the Nizhnyaya Zeya Basin, demonstrate a south-westward displacement of the Badzhal–Bureya–Lesser Khingan block relative to the North China block. Thedynamic effect of the convergent boundary between the Amur and Okhotsk Sea plates is assumed to extendinland also involving the Zeya–Bureya Basin area. The measurements on the local geodynamic test site relatethe deformations of buildings and constructions in the Settlement of Konstantinovka to the mobility of base-ment faults in the southern part of the Nizhnyaya Zeya Basin. Aseismic. deformations are determined by slowhorizontal tectonic movements in the junction zone of NNE-trending structures of the latter basin and near-lat-itudinal faults of the Khailar–Xunhei Belt.