Role of transverse tectonics in the Himalayan collision: Further evidences from two contemporary earthquakes

被引：37

作者：

Dasgupta, Sujit ^{[1
]}

Mukhopadhyay, Basab ^{[2
]}

Mukhopadhyay, Manoj ^{[3
]}

Nandy, D. R. ^{[1
]}

机构：

[1] Ex Geol Survey India, Kolkata, India

[2] Geol Survey India, Kolkata 700016, W Bengal, India

[3] King Saud Univ, Dept Geol & Geophys, Riyadh 11451, Saudi Arabia

来源：

JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA | 2013年 / 81卷 / 02期

关键词：

Earthquakes; Transverse tectonics; Fault plane solution; Lateral slip; Himalaya; BENEATH SOUTHERN TIBET; EASTERN NEPAL; ZONE; SEISMOTECTONICS; MODEL;

D O I：

10.1007/s12594-013-0027-5

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Two contemporary earthquakes originating in the central Himalayan arc and its foredeep (Sikkim earthquake of 18.09.2011, M-w 6.9, h: 10-60 (?) km and Bihar-Nepal earthquake of 20.08.1988, Mw 6.8, h: 57 km) are commonly associated with transverse lineaments/faults traversing the region. Such lineaments/faults form active seismic blocks defining promontories for the advancing Indian Craton. These actually produce conjugate shear faulting pattern suggestive of pervasive crustal interplay deep inside the mountains. Focal mechanism solutions allow inferring that large part of the current convergence across the central Himalayan arc is accommodated by lateral slip. Similar slip also continues unabated in the densely populated foredeep for distances up to several tens of kilometers south of the Main Boundary Thrust (MBT).

引用

页码：241 / 247

页数：7

共 22 条

[11] Metamorphism and magmatism during the Himalayan collision [J].