Home – Home – Jornals – Russian Geology and Geophysics 2002 number 5

Fracturing in the Primorsky fault, a master fault in the Baikal rift system, is investigated using high-resolution structural data. The fault zone consists of several roughly parallel fault segments and elongate wedge-shaped blocks cut by large transversal faults that belong to a fault running along the Sarma valley. Fracturing parameters were used to distinguish the influence areas of separate fault planes having a regularly zoned structure. The Cenozoic activity of the Primorsky fault has been selective and is restricted to the influence areas of individual fault planes. Right-lateral oblique-slip and normal faulting occurs in NNW and NE extension stress fields along fractures parallel to the Primorsky and Sarma faults. The breadth of the Primorsky fault zone involved in the Cenozoic activity exceeds 3 km.