Microfacies Characterizations and Paleoenvironment of Upper Part of Qamchuqa Formation from Chwarqauran Section, Sulaimaniyia Area, Kurdistan Region, Iraq

  • Salah Hussain Department of Petroleum Geology and Minerals, College of Science, University of Diyala, Diyala, Iraq
  • Abdalratha M. Sahaab Department of Petroleum Geology and Minerals, College of Science, University of Diyala, Diyala, Iraq
  • Khaldoun I. Ahmad Liberal Art & Science, Saint Cloud Technical & Community College, Minnesota, USA
  • Israa Q. Hussain Department of Petroleum Geology and Minerals, College of Science, University of Diyala, Diyala, Iraq
  • Sarah A. Hashem Department of Petroleum Geology and Minerals, College of Science, University of Diyala, Diyala, Iraq
Keywords: Qamchuqa Formation, Chwarqauran, Albian, Microfacies, Iraq

Abstract

The Qamchuqa Formation was studied in Chwarqauran section, Sulaimanyia, Kurdistan region, Northeastern Iraq. The lithology of the formation contains limestone throughout the whole section except for one bed of dolomite at the Middle part. Twenty-four slides were prepared from 24 rock samples that were taken from this section to discriminate the petrography and fossil content. The petrographic study shows four main microfacies including lime mudstone, wackestone, packstone, and floatstone. Additionally, there are four sub microfacies: bioclast wackestone, miliolid wackestone, bioclast packstone and orbitolinid packstone. However, the fossil content shows the abundance of benthic foraminifera against the planktonic. All the microfacies indicate facies zone 7, 8 and 9A which reflect deposition in the platform interior between the tidal flat to the mid ramp and back reef environment

Published
2021-02-23