دراسة بتروغرافية و معدنية تكويني عنه و الفرات في منطقة خان البغدادي في العراق

الملخص EN

Mineralogical and petrographical study has been done on (25) samples of Anah Formation (Upper Oligocene) and Euphrates Formation (Lower Miocene) of outcrop at (25m) in Wadi Al-Asadi in Khan Al- Baghdadi area.

The mineralogical study showed that Calcite is the main mineral within the Anah rock formation, whereas the rocks of Euphrates Formation consist of Calcite and Dolomite, Calcite is concentrated in the lower portion of the formation, whereas Dolomite is dominant in the middle and the upper portion of the Euphrates Formation, in addition to quartz, clay minerals, iron oxide and organic matter as insoluble residues.

From the thin sections study, five main microfacies have been identified these are: lime mudstone, lime wackestone, lime wackestone-packstone, oolitic lime packstone-grainstone, and lime boundstone.

Based on microfacies study and its fossiles content, it has been possible to determine the depositional environment of Anah Formation which deposits in the area of restricted platform and coral reef,Euphrates Formation have been suggested as a restricted platform (shallow lagoon).