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Sedimentological Study of Manchar Formation, Kari Buthi Section, Northern Laki Range, Southern Indus Basin, Pakistan

Author Affiliations

  • 1Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China and University of Chinese Academy of Sciences, Beijing, China Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan
  • 2Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
  • 3University of Chinese Academy of Sciences, Beijing, China and Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan
  • 4University of Chinese Academy of Sciences, Beijing, China and Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China and Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan
  • 5Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China and
  • 6Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan and Oil and Gas Development Company Limited Islamabad, Pakistan
  • 7Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan
  • 8Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China and Kathmandu Centre for Research and Education Kirtipur, Nepal
  • 9Centre for Pure and Applied Geology, University of Sindh Jamshoro, Pakistan

Int. Res. J. Earth Sci., Volume 8, Issue (2), Pages 9-21, August,25 (2020)

Abstract

The lithofacies studies provide key information to interpret the depositional environments of the sedimentary rocks. Here we study the~1055 m thick Manchar Formation with the age of Miocene to Pliocene which is well exposed at Kari Buthi Division, Northern Laki Range, Southern Indus Basin Sindh, Pakistan. We applied grainsize analysis method to obtain statistical parameters, cumulative frequency curves, discriminatory and discriminatory diagrams. We found that the Manchar Formation encompasses six different fluvial depositional environments including coarse-grained flat bedding sandstone to fine, Conglomerate and agglomerate Sandstone facies, coarse grained trough the cross bedded sandstone facies to sufficient, Shale facies, Mudstone facies, and Clay facies. Principally the common sedimentary structures are trough cross bedding and planner lamination in the area. And the results based on bivariate diagrams further confirm the deposition of Manchar Formation through a braided river system.

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