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Erosion, fault initiation and topographic growth of the North Qilian Shan (northern Tibetan Plateau)

Zheng, Dewen and Clark, Marin K. and Zhang, Peizhen and Zheng, Wenjun and Farley, Kenneth A. (2010) Erosion, fault initiation and topographic growth of the North Qilian Shan (northern Tibetan Plateau). Geosphere, 6 (6). pp. 937-941. ISSN 1553-040X. https://resolver.caltech.edu/CaltechAUTHORS:20110110-113846518

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Abstract

New apatite (U-Th)/He from the northeastern margin of the Tibetan Plateau (north Qilian Shan) indicate rapid cooling began at ~10 Ma, which is attributed to the onset of faulting and topographic growth. Preservation of the paleo-PRZ in the hanging wall and growth strata in the footwall allow us to calculate vertical and horizontal fault slip rates averaged over the last 10 Myr of ~0.5 mm/yr and ~1 mm/yr respectively, which are within a factor of two consistent with Holocene slip rates and geodetic data. Low fault slip rates since the initiation of the northern Qilian Shan fault suggest that total horizontal offset did not exceed 10 km. Further, emergence of the northern Qilian Shan occurs during a period of increased aridity in northern Tibet but is associated with only a minor expansion of the northern plateau perimeter, which is well established near collision time. Outgrowth of the northern Qilian Shan at ~10 Ma could be simple propagation of the larger Qilian Shan system, occurring in response to decreased slip rates on the Altyn Tagh fault or as a result of the change in GPE of the central plateau.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1130/GES00523.1DOIUNSPECIFIED
http://geosphere.gsapubs.org/content/6/6/937PublisherUNSPECIFIED
http://geosphere.geoscienceworld.org/cgi/content/abstract/6/6/937PublisherUNSPECIFIED
http://mr.crossref.org/iPage/?doi=10.1130%2FGES00523.1OtherUNSPECIFIED
ORCID:
AuthorORCID
Clark, Marin K.0000-0002-6141-8422
Farley, Kenneth A.0000-0002-7846-7546
Additional Information:© 2010 Geological Society of America. Received 12 May 2009. Revision received 9 April 2010. Accepted 11 May 2010. First published online October 22, 2010. We thank Lindsey Hedges, Alison Duvall, Peter Molnar, and support by the National Science Foundation of China (40672134 and 40234040), and DFIGCEA0607122, and the US National Science Foundation, Continental Dynamics Program (EAR- 0507431). Reviews by G. Dupont-Nivet, A. Carter, K. Huntington, and three anonymous reviewers improved the clarity of this manuscript.
Funders:
Funding AgencyGrant Number
National Science Foundation of China40672134
National Science Foundation of China40234040
National Science Foundation of ChinaDFIGCEA0607122
NSFEAR-0507431
Subject Keywords:(U-Th)/He; absolute age; apatite; Asia; Cenozoic; China; compression tectonics; cooling; elevation; erosion; exhumation; Far East; faults; granites; igneous rocks; northeastern Tibetan Plateau; orogeny; phosphates; plutonic rocks; Qilian Mountains; slip rates; tectonics; thermal history; Tibetan Plateau; topography
Issue or Number:6
Record Number:CaltechAUTHORS:20110110-113846518
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110110-113846518
Official Citation:Zheng Dewen, Marin K. Clark, Zhang Peizhen, Zheng Wenjun, and Kenneth A. Farley Erosion, fault initiation and topographic growth of the north Qilian Shan (northern Tibetan Plateau) Geosphere (December 2010), 6(6):937-941
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21670
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Jan 2011 17:44
Last Modified:09 Mar 2020 13:18

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