Palaeoenvironmental and sequence stratigraphic analyses of the Jurassic Datta Formation, Salt Range, Pakistan

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• 作者：Shahid Iqbal ; Irfan U Jan ; M Gulraiz Akhter…
• 关键词：Lower Jurassic ; Datta Formation ; Salt Range ; Indian shield ; Indus Basin
• 刊名：Journal of Earth System Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：124
• 期：4
• 页码：747-766
• 全文大小：13,847 KB
• 参考文献：Abbasi A I, Haneef M, Obaid S, Daud F and Quraishi A W 2012 I. A Mesozoic deltaic system along the western margin of the Indian Plate: Lithofacies and depositional setting of Datta Formation, north Pakistan; Arab. J. Geosci. 5 471-80.
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• 作者单位：Shahid Iqbal (1) (2)
  Irfan U Jan (3)
  M Gulraiz Akhter (1)
  Mehwish Bibi (4)
  
  1. Department of Earth Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
  2. Department of Geodynamicss and Sedimentology, University of Vienna, Althanstrasse, 14 A-1090, Vienna, Austria
  3. National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan
  4. Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geosciences
  Extraterrestrial Physics and Space Sciences
  
• 出版者：Springer India
• ISSN：0973-774X

文摘

The Lower Jurassic Datta Formation, western Salt Range, Pakistan, comprises three facies associations: (1) channel belt facies association (CBFA), (2) channel margin, and overbank facies association (CMOFA), and (3) lagoonal facies association (LFA). A cyclic fining-upward trend in the succession is represented by basal quartzose conglomerate/pebbly sandstone, through coarse to fine quartzose sandstone to siltstone and shales/claystone, which contains some carbonate accumulation. Two prominent depositional sequences are recognized in the Datta Formation with the lower high and upper low magnitude cycles. The Datta Formation thus represents a thick sedimentary succession and in the study area, i.e., western Salt Range, mainly channel belt, flood plain and/or delta top facies are exposed. The palaeocurrent analysis shows that the source area with acidic plutonic rocks laid to S–SE in the Indian shield, aravalies or older sedimentary rocks of the Indus Basin (i.e., Khewra, Tobra and Warchha formations). A tentative stratigraphic correlation of the Datta Formation with the lower Jurassic Lathi Formation, India invites further work in parts of India, which will elaborate the extent of the Datta Formation in the Greater Indian peninsula and develop palaeogeographic setting for this Lower Jurassic deltaic rock unit.