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Authors
Affiliations
1 Geophys. lnst., Czechosl. Acad. Sci., Praha, 141-31 Czechoslovakia, SK
2 Geophys. Res. Group, L. Eotvos Univ., Budapest, 1083, HU
3 Geoscience Division, Regional Research Laboratory, Jorhat, 785 006, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 3 (1991), Pagination: 282-292
Abstract
The study area, which represents a boundary collision zone between the Indian and Euroasian plates, has been the focus of intense seismic studies for decades. Except for events that have been clearly associated with the underthrusting of the Indian plate. the data reported by the regional network in the Northeastern Regions of India indicate a layer of concentrated seismicity in the lower crust at a depth range of 30 to 40 km. The lithosphere rheology was assessed on the basis of the frictional failure in the brittle regime, and power-law steady-state creep in the ductile regime. Rheological profiles were constructed fora 1-0 crustal structural and thermal model. The rheological stratification of the lithosphere was compared with the earthquake depth distribution which indicated a reasonable confinement of seismicity to brittle horizons.
Keywords
Earthquake, Arakan-Yoma Fold Belt, Northeastern India.
