A preliminary account of the Middle Jurassic plays in Najafpur Village, southeastern Hazara, Khyber Pakhtunkhwa, Pakistan. | [Journal of Himalayan Earth Sciences • 2015]

Author(s):

1. Abdus-Saboor: Department of Geology, University of Peshawar, Pakistan

2. Fayyaz Ali: Department of Geology, University of Peshawar, Pakistan

3. Sajjad Ahmad: Department of Geology, University of Peshawar, Pakistan

4. M. Haneef: Department of Geology, University of Peshawar, Pakistan

5. M. Hanif: National Centre of Excellence in Geology, University of Peshawar, Pakistan

6. M. Imraz: National Centre of Excellence in Geology, University of Peshawar, Pakistan

7. Nowrad Ali: Department of Geology, University of Peshawar, Pakistan

8. Muhammad Azhar Farooq Swati: Department of Geology, University of Peshawar, Pakistan

9. M. Zahid: Pakistan Petroleum Limited, Karachi, Pakistan

10. Izhar Sadiq: National Centre of Excellence in Geology, University of Peshawar, Pakistan

Abstract:

The southeast Hazara forms a part of Himalayan fold and thrust belt of Pakistan. The study area is covered by Mesozoic-Cenozoic age rocks that have undergone severe deformation and is characterized by the formation of complex fold and thrust assemblages. The structures include northwest and southeast verging thrust systems with associated folds. Two deformational events separate the structures in the area. The structures in the northwestern quadrant display southeast facing direction whereas the southeastern quadrant is dominated by structures that dip towards southeast. The general trend of the structures is northeastsouthwest and that attributes to the northwest-southeast contractile deformation. The trend of the structures depicts that stresses were directed from northwest. The folds are found to be tight to overturned and the cores of the folds are usually occupied by competent Samana Suk Formation. The organic rich horizons were eld within the Formation, the TOC of which was calculated as 0.28%. Microfacies analysisobservedin the reveals well sorted and well-rounded ooidal-peloidal grainstones and packstones as well as dolomitized and fractured wackestones and mudstones. The diagenetic signatures include fracturing and dolomitization depicting its source and reservoir quality for a hydrocarbon prospect.

Page(s): 41-49

DOI: DOI not available

Published: Journal: Journal of Himalayan Earth Sciences, Volume: 48, Issue: 1, Year: 2015

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