Complex rift geometries resulting from inheritance of pre-existing structures: Insights and regional implications from the Barmer Basin rift

摘要

Structural studies of the Barmer Basin in Rajasthan, northwest India, demonstrate the important effect that pre-existing faults can have on the geometries of evolving fault systems at both the outcrop and basin-scale. Outcrop exposures on opposing rift margins reveal two distinct, non-coaxial extensional events. On the eastern rift margin northwest southeast extension was accommodated on southwest and west-striking faults that form a complex, zig-zag fault network. On the western rift margin northeast southwest extension was accommodated on northwest-striking faults that form classical extensional geometries.