Indication of calcareous tempestite inside the Qulqula Group in the Zagros Suture Zone, KRI

Mushir M. Baziany

Department of Geology, Faculty of Science and Education Science, University of Sulaimani, Sulaimani



This sedimentological study focuses on carbonate storm deposits (calcareous tempestites) have been recognized for Qulqula platform in the Zagros Suture Zone outcropping at Sharbazher area in the northeastern Sulaimani City. This deposits are recorded between the oolitic limestone and calcareous turbidities in the Qulqula Group for the first time. These offer the first indication of event sedimentation in the Qulqula domain. Calcareous tempestites deposited on subsided eastern Arabian continental margin at initial stage of continental rifting, most possibly during Early Late Triassic to Early Jurassic. It is mostly encompasscalcarenite beds and indicating by some storm generated criteria such as: hummocky cross-stratification, parallel lamination, symmetrical wave-ripples, normally graded flat pebble conglomerate, and sole mark (flute caste, load cast, groove mark). Moreover, found Cruziana and Skolithos trace fossils with these calcarenite beds. Finally, for paleogeographic configuration of Qulqula carbonate platform, facies-depth connections on carbonate ramp model build up as shallowing-upward cycles from calcareous turbidities which deposited in distal part of outer ramp and carbonate distally steepened ramp to calcareous tempestites in mid ramp to oolitic limestone were formed in high-energy inner carbonate ramp.

Key Words:
Qulqula Radiolarian Formation,
Zagros Suture Zone, Carbonate tempestite, Calcarenite,
Qulqula platform, Triassic-Jurassic.