Writers : Hoseyni Barzi,Mahboobeh;Jafarzadeh,mehdi
Refference : Geosciences Scientific Quarterly Journal,No.:63,P.:164
Publishing Year : 1386

Abstract :

Petrofacies analyses of Asmari Formation carried out on thin sections, obtained from oil wells of number 11,85 and 89 in Ahwaz oil field, show 5 carbonate-evaporate microfacies associations (related to a carbonate ramp) and 2 siliciclastic petrofacies. Point counting data plotted on Qt93.34 F4.10 L2.59 and Qm86.75 F4.10 L9.15 diagrams imply the cratonic and recycled orogen tectonic provenance. Furthermore, these results and the other petrographic evidences indicate a source rock with sedimentary and how to medium degree metamorphic composition for Ahvaz sandstone. Combining the obtaind results with global sea level changes, variation in sediment supply and regional and local tectonic evolution, assisted us to recognize 6 evolutionary stages for Samara basin. In fact, Asmari Formation deposited in a carbonate-evaporate ramp with different amount of sediment influx through the time.

Subject List :