Tectonic Fracturing of the Lithosphere of the Priamurye Region by Submeridional and Sublatitudinal Faults (from Geophysical Data and Relief Analysis)

Abstract

Based on the data of relief analysis, the gravity and magnetic anomaly axes, earthquake foci sequences, and V_p/V_s ratio values, tectonic fracturing of the lithosphere is studied and tectonic submeridionally and sublatitudinally oriented fracturing zones are distinguished in the Priamurye region. Separate segments of extended submeridional and sublatitudional fracturing zones are evidenced from the regional faults detected using the geological methods. Submeridionally oriented tectonic fracturing zones are mostly revealed, which do not correlate with the regional faults. Fracturing zones of similar orientation which are displayed in lineaments of different type and correlate with the seismoactive zones may be considered as hidden faults.