Late Cenozoic Tectonics and Sedimentation in the North-Western Himalayan Foredeep: II. Eastern Limb of the Northwest Syntaxis and Regional Synthesis

  1. P. A. Allen and
  2. P. Homewood
  1. Douglas W. Burbank1,
  2. Robert G. H. Raynolds2 and
  3. Gary D. Johnson3

Published Online: 5 MAY 2009

DOI: 10.1002/9781444303810.ch16

Foreland Basins

Foreland Basins

How to Cite

Burbank, D. W., Raynolds, R. G. H. and Johnson, G. D. (1986) Late Cenozoic Tectonics and Sedimentation in the North-Western Himalayan Foredeep: II. Eastern Limb of the Northwest Syntaxis and Regional Synthesis, in Foreland Basins (eds P. A. Allen and P. Homewood), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303810.ch16

Author Information

  1. 1

    Department of Geological Sciences, University of Southern California, Los Angeles, CA 90089–0741, USA

  2. 2

    AMOCO Production Company, P.O. Box 3092, Houston, TX 77253, USA

  3. 3

    Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire 03755, USA

Publication History

  1. Published Online: 5 MAY 2009
  2. Published Print: 22 DEC 1986

ISBN Information

Print ISBN: 9780632017324

Online ISBN: 9781444303810

SEARCH

Keywords:

  • Late Cenozoic tectonics and sedimentation in north-western Himalayan foredeep - Eastern limb of Northwest Syntaxis and regional synthesis;
  • structural applications of chronologic data;
  • Kashmir to Jhelum transect;
  • NE slopes of Pir Panjal Range, glacial deposits and extensive ‘Karewa’ surfaces obscuring bedrock;
  • deformed foredeep;
  • Plio-Pleistocene structural disruption in north-western Indo-Gangetic foredeep

Summary

In order to help delineate the succession of late Cenozoic tectonic and stratigraphic events in the north-western Himalayan foredeep and adjacent ranges, a geological transect is described which extends from the north-eastern margin of the Kashmir Basin to the axis of the Jhelum Re-entrant along the eastern boundary of the Potwar Plateau. When combined with previous bedrock mapping, chronologic and stratigraphic studies of nine sections in the intermontane basin and the bounding foredeep define three primary pulses of late Cenozoic uplift affecting the Pir Panjal Range (5–4, 1.9–1.5, and 0.4–0 Myr ago). Many of the changes in facies, provenance, and palaeocurrents observed in the sedimentary rocks along the transect can be related to these deformational episodes.

When these data are combined with those from the Potwar Plateau and adjacent intermontane basins in Pakistan (Johnson et al., this volume), a synthesis emerges illustrating a complex evolution of the foredeep during the past 5 Myr. Early episodes of uplift and rotation in the vicinity of the Salt Range are shown to be synchronous with initial uplift of the Pir Panjal Range. Extensive deformation between 2.1 and 1.6 Myr ago across much of the Potwar Plateau and, perhaps, along the bounding thrusts of the Pir Panjal appears causally related to a thrust ramping event in the Salt Range. In addition to providing a history of sedimentation and deformation that is more temporally constrained than has previously been possible, this study suggests a synchrony of several sets of structural events across a broad portion of the foredeep. This widespread synchrony may represent diverse responses to a common cause: stress accumulation and release due to interactions between irregular basement topography on the underthrusting Indian plate and the basal detachment of the overriding foredeep.