Journal article

A thermochronological perspective on the morphotectonic evolution of the southeastern Tibetan Plateau

Yuntao Tian, Barry P Kohn, Andrew JW Gleadow, Shengbiao Hu

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH | AMER GEOPHYSICAL UNION | Published : 2014

Abstract

A large part of the southeastern Tibetan Plateau (TP) is characterized by low-relief surfaces at high elevations (>3.5 km). The origin of these landscapes and their geodynamic implications with regard to evolution of the southeastern TP has been the subject of considerable debate. Focusing on this topic, this study utilizes fission track and (U-Th)/He thermochronology to reconstruct the thermal history of the Late Triassic Daocheng granite, on which a low-relief high-elevation landscape has developed. Results suggest that the plateau surface experienced widespread Late Jurassic to Early Cretaceous cooling (at a rate of ~1-2°C/Ma), followed by minimal regional cooling (~0.3°C/Ma) and Early Mi..

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Grants

Awarded by China National Oil-Gas Major Special Projects


Funding Acknowledgements

The University of Melbourne thermochronology laboratory receives infrastructure support from the Australian Research Council and the AuScope Program of NCRIS. S.H. received support from China National Oil-Gas Major Special Projects (2011ZX05008-002). Y.T. is supported by IPRS and MIRS scholarships and David Hay Postgraduate Writing-Up Award from the University of Melbourne. Y.T. is also grateful to Shifeng Wang for his field assistance and to Abaz Alimanovic for his technical assistance with (U-Th-Sm)/He dating. Incisive and constructive reviews by two anonymous reviewers and editorial work by Tom Parsons and David Shuster are gratefully acknowledged.