GEOLOGICAL, STRATIGRAPHICAL MODELLING OF MAKRAN OFFSHOR

Abstract

The Makran accretionary prism developed in the north-western part of the Indian Ocean as a consequence of the subduction of the Arabian Sea since Late Cretaceous times, we surveyed most of the accretionary comp lex of Pakistan with R/V Marion Dbfresne. Th Makran accretionary prism results from, the nortkwardmotion of the oceanic crust (White and Klitgord, 1976; Wkite, 1983; Minskull et aL, 1992), witk an average speed of 3 cmfyear at present Large kistoric earthquakes, suck as the magnitude 8.2 recorded in November 1945 (Packeco and Sykes, 1992; Byrne et aL, 1992), are clearly related to the shallow dipping inter-plate mega-thrust The coseismicmotion might be related to the episodic uplift of small mud volcanoes rising up above tke sea-level, confirming an overpressure regime imposed at depth.