Abstract
Trends of basement highs, faults and structural patterns on the India-Pakistan (Indus) continental shelf and slope, and in the deep waters extending to the Lakshmi (Laxmi)-Chagos-Laccadive Ridge complex in the eastern Arabian Sea, are parallel to the ancient Precambrian structural and tectonic grain of the Indian subcontinent. These trends, the occurrence of horst-graben style features of the basement of the Lakshmi Ridge and of the region north and east of it, both in deep waters and shelf areas, and the oceanic nature of the basement west of the Ridge, suggest that the rifted transitional crust extends as far as the Lakshmi-Chagos-Laccadive Ridge complex. The extension of rifted crust with horst-graben style tectonic features into deep offshore areas of the Arabian Sea, has implications for future hydrocarbon exploration in the region.
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