Microfacies and depositional environment of the upper oligocene and lower miocene successions from the Iraqi Kurdistan Region

الملخص EN

Upper oligocene and lower miocene successions in the high/low folded thrust zones boundary from the Sulaimani District, Kurdistan region, northeast Iraq, are manifested by the bajwan, anah and jeribe formations.

studied sections are mostly underlain by unconformity, above the eocene carbonates (pila spi formation) and unconformably overlain by the middle miocene deposits of fatha (lower fars) formation.

three studied sections (basara, xamsha and wazyara) have been investigated for their microfacies and depositional environments.

accordingly, eleven submicrofacies are identified.

main depositional environments are represented by the inner ramp setting that is changed to middle ramp during the upper oligocene (bajwan formation), while inner ramp setting is changed to semi-closed as lagoonal environment during the lower miocene (Anah and/or Jeribe formations).