Abstract:
The (Khanozai) Karezat Quadrangle, situated 70 kilometres northeast of Quetta, covers Khanozai and its surrounding areas. Geologically, the region comprises distinct zones, the Urak Basin in the south, the ultramafic, gypsum, and Jurassic basins in the middle, and the Kakar-Khorasan Back Arc basin in the northwestern portion. The terrain is dominated by rocks ranging in age from Jurassic to recent/subrecent, structurally divided into three domains, the Tungi- Ahmadun Syncline, Khanozai-Torkhula Ophiolite Segment and Murgha Zikriazai Flysch Segment. The Tungi-Ahmadun area features a prominent syncline, predominantly characterized by the Urak Group, ranging from Miocene to Early Pleistocene. Notably, the Urak Group comprises Uzdapasha, Shinmati and Urak formations, which are well-exposed in the study area. The Urak Group is thrusted by the Jurassic Alozai Group to the north and the Cretaceous Parh and Bibai formations to the south. In the southeastern corner, it contacts the Jurassic Loralai, Cretaceous Sembar and Eocene Shaheed Ghat formations. The Khanozai-Torkhula Ophiolite Complex is predominantly occupied by the Jurassic Singwar and Loralai formations of the Alozai Group. Here, the ultramafic intrusion holds significant potential for chromite, forming part of the Muslim Bagh Ophiolite Complex. The Murgha Zikriazai Flysch Segment (Pishin Flysch Basin) comprises Eocene Nisai Formation, Oligocene Murgha Faqirazi Shale Member and Oligocene-Miocene Shaigalu Sandstone Member of the Kajok Formation. The Nisai Formation consists of fossiliferous limestone and shale at the base, multicolored shale in the middle, and medium to thin-bedded fine-grained sandstone, shale, and brecciated cliff-forming limestone in the upper part. The central part of the (Khanozai) Karezat Quadrangle is covered by alluvial deposits represented by the Pleistocene Bostan Formation and recent to sub-recent material. In the northern Khanozai region, potential hydrocarbon structures exist near the Karez Haji Dadullah and Murgha Zikhazai areas. Geophysical surveys are recommended in this region to delineate subsurface sequences for assessing hydrocarbon potential.
Page(s):
1-1
DOI:
DOI not available
Published:
Journal: Seventh International Conference on Earth Sciences Pakistan (ESP-2024), June 2-4, 2024 (Abstract Book), Volume: 0, Issue: 0, Year: 2024