Estimates of geothermal gradients and heat flow from BSRs along the Western Continental Margin of india.

Citation
Yh. Rao et al., Estimates of geothermal gradients and heat flow from BSRs along the Western Continental Margin of india., GEOPHYS R L, 28(2), 2001, pp. 355-358
Citations number
32
Categorie Soggetti
Earth Sciences
Journal title
GEOPHYSICAL RESEARCH LETTERS
ISSN journal
00948276 → ACNP
Volume
28
Issue
2
Year of publication
2001
Pages
355 - 358
Database
ISI
SICI code
0094-8276(20010115)28:2<355:EOGGAH>2.0.ZU;2-D
Abstract
Geothermal gradients and heat flow were estimated from the position of Bott om Simulating Reflectors (BSRs) identified on seismic reflection sections f rom the Western Continental Margin of India (WCMI). The estimated geotherma l gradients along the WCMI range between 35 to 65 degreesC/km and heat flow varies from 50 to 130 mW/m(2). The geothermal gradient structure of WCMI i nferred from the BSRs, shows a landward decrease in heat flow coupled with a high heat flow zone in the north and relatively low heat flow zone at the southern end. A decrease of sediment thickness proximal to the ocean/conti nent boundary could explain these high heat flow distribution trends west o f the Laccadive ridge. The Bombay-Saurashtra offshore region emerges as a z one of high heat flow and its proximity to the Deccan volcanic activity at 65 Ma needs further study.