FAULT PATTERN AND STRESS FIELD IN THE WESTERN TUNKA RIFT (southwestern flank of the Baikal rift system)
O.V. Lunina and A.S. Gladkov
Keywords: Faults, fractures, stress field, earthquakes, earthquake mechanisms, Tunka rift
Pages: 1188-1199
Abstract
New structural and tectonophysical data provide more details on the fault pattern and the stress field of the western Tunka rift in the southwestern flank of the Baikal rift system. The rift valley is controlled mostly by W-E and NE faults, and the rift ridges and basin links are dominated by NW and N-S faults. The fault pattern shows good correlation with the distribution of M  3.3 earthquakes. Stress fields reconstructed from fracture measurements and correlated to the available earthquake mechanisms show that the rift currently evolves in a transtension environment. |
