Oceanology

Volume 35, Number 2, October 1995
Russian Edition March -April 1995


Structure of the Earth's crust within the intraplate deformation area in the Central Indian Basin

Yu. P. Neprochnov, V. V. Sedov, V. V. Bezverbnaya, A. A. Buravtsev, and B. N. Grin'ko

P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow

I. N. El'nikov

P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Southern Department, Gelendzhik


Abstract

The results of a deep seismic sounding (DSS) carried out during cruise 22 of the R/V Professor Shtokman within the region of lithospheric intraplate deformations in the Central Indian basin are presented. The studies were done using bottom seismographs and high-powered airguns within two study areas and a regional profile intersecting the northern part of the deformation area along the meridional direction. The DSS results have revealed a highly variable block-mosaic structure of the Earth's crust. New data are compared with results of the previous investigations in the Central Indian basin as well as with an averaged seismic model for all the basins of the Indian Ocean. Strongly deformed crustal blocks differ from the typical model of oceanic basins by a more complex structure and the presence of high- and low-velocity layers, which may be associated with active tectonic processes in the region.

Figures 11, Tables 0, References 15, Pages 245-253
Received January 25, 1994

© Copyright 96 by the American Geophysical Union.
CCC code: 0001-4370/96/3502-0016$18.00/1


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