Journal article
Rapid exhumation of the upper Siang Valley, Arunachal Himalaya since the Pliocene
D Salvi, G Mathew, B Kohn
Geomorphology | ELSEVIER SCIENCE BV | Published : 2017
Abstract
The work presents in situ low temperature thermochronological (Apatite Fission Track (AFT) and (U-Th)/He zircon (ZHe)) ages from the Siang Valley in the NE Himalayan syntaxial zone. Our results highlight the unique spatial erosion along the axial regions of the Siang antiform. All the ZHe cooling ages from the region range between ~ 14 and 9 Ma, except for a northernmost sample that is distinctly younger (~ 3.8 Ma). Results from AFT data (2.4 Ma to present) record Pleistocene cooling along the Siang River valley in the Siang antiform and reveal a general northward younging trend of ages with rapid cooling < 1.0 Ma in the northernmost part of Siang Valley. Thermal modelling of confined track ..
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Funding Acknowledgements
We are grateful for the funding from CSIR-HRDG to DS and from MoES (MoES/P.O. (Geosci)/2/2012) to GM. We thank two anonymous reviewers and the special issue editor, Pradeep Srivastava for their insightful comments that have greatly improved the manuscript. We acknowledge Manish Dutta for help with the laboratory procedures and Biraj Borgohain for help during the field and for insightful discussions. The University of Melbourne thermochronology facility is supported by the National Collaborative Research Infrastructure Strategy AuScope program.