Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet

Chevalier, Marie -Luce; Van der Woerd, Jerome; Tapponnier, Paul; Li, Haibing; Ryerson, Frederick J.; Finkel, Robert C.

doi:10.1130/B31269.1

Title: Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet

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Abstract

Insight into the spatial and temporal changes of slip-rate is essential to understand the kinematic role of large strike-slip faults in continental collision zones. Geodetic and geologic rates from present to several million years ago along the Karakorum fault range from 0 to 11 mm/yr. Here, we determine the first late Quaternary slip-rate at the southern end of the linear Bangong-Chaxikang segment of the Karakorum fault, using cumulative offsets (20–200 m) of fans and terraces at three sites, as well as 74 new ¹⁰Be surface-exposure ages to constrain the age of these offset geomorphic markers. The rate is >3 mm/yr at sites Gun and Chaxikang, and it is >1.7–2.2 mm/yr at the Gar fan site. Together with rates obtained along the southernmost Menshi-Kailas segment, the Karakorum fault slip-rate seems to increase southeastward from south of Bangong Lake to Kailas (from >3 to >8 mm/yr). These Karakorum fault slip-rate data (>3–8 mm/yr), together with the total length of the fault (>1000 km) and its initiation age (>13–23 Ma), confirm that the Karakorum fault is the major fault accommodating dextral strike-slip motion NE of the western Himalayas. Furthermore, the dextral Karakorum fault in the south and the conjugate left-lateral Longmu Co–Altyn Taghmore »« less

Authors:

Chevalier, Marie -Luce ^[1]; Van der Woerd, Jerome ^[2]; Tapponnier, Paul ^[3]; Li, Haibing ^[4]; Ryerson, Frederick J. ^[5]; Finkel, Robert C. ^[6]

Chinese Academy of Geological Sciences, Beijing (People's Republic of China); Institut de Physique du Globe de Paris, Paris cedex (France)
Univ. de Strasbourg, Strasbourg cedex (France)
Institut de Physique du Globe de Paris, Paris cedex (France); Earth Observatory of Singapore (Singapore)
Chinese Academy of Geological Sciences, Beijing (People's Republic of China)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of California, Berkeley, CA (United States)

Publication Date:: Fri Jan 01 00:00:00 EST 2016

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1461734

Report Number(s):: LLNL-JRNL-695463
Journal ID: ISSN 0016-7606; 825228

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Geological Society of America, Bulletin

Additional Journal Information:: Journal Volume: 128; Journal Issue: 1-2; Journal ID: ISSN 0016-7606

Publisher:: Geological Society of America

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES

Citation Formats


                    Chevalier, Marie -Luce, Van der Woerd, Jerome, Tapponnier, Paul, Li, Haibing, Ryerson, Frederick J., and Finkel, Robert C. Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet.  United States: N. p., 2016. 
Web.  doi:10.1130/B31269.1.

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                    Chevalier, Marie -Luce, Van der Woerd, Jerome, Tapponnier, Paul, Li, Haibing, Ryerson, Frederick J., & Finkel, Robert C. Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet.  United States.  https://doi.org/10.1130/B31269.1

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                    Chevalier, Marie -Luce, Van der Woerd, Jerome, Tapponnier, Paul, Li, Haibing, Ryerson, Frederick J., and Finkel, Robert C. Fri .  
"Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet".  United States.  https://doi.org/10.1130/B31269.1.  https://www.osti.gov/servlets/purl/1461734.

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@article{osti_1461734,

  title        = {Late Quaternary slip-rate along the central Bangong-Chaxikang segment of the Karakorum fault, western Tibet},

  author       = {Chevalier, Marie -Luce and Van der Woerd, Jerome and Tapponnier, Paul and Li, Haibing and Ryerson, Frederick J. and Finkel, Robert C.},

  abstractNote = {Insight into the spatial and temporal changes of slip-rate is essential to understand the kinematic role of large strike-slip faults in continental collision zones. Geodetic and geologic rates from present to several million years ago along the Karakorum fault range from 0 to 11 mm/yr. Here, we determine the first late Quaternary slip-rate at the southern end of the linear Bangong-Chaxikang segment of the Karakorum fault, using cumulative offsets (20–200 m) of fans and terraces at three sites, as well as 74 new 10Be surface-exposure ages to constrain the age of these offset geomorphic markers. The rate is >3 mm/yr at sites Gun and Chaxikang, and it is >1.7–2.2 mm/yr at the Gar fan site. Together with rates obtained along the southernmost Menshi-Kailas segment, the Karakorum fault slip-rate seems to increase southeastward from south of Bangong Lake to Kailas (from >3 to >8 mm/yr). These Karakorum fault slip-rate data (>3–8 mm/yr), together with the total length of the fault (>1000 km) and its initiation age (>13–23 Ma), confirm that the Karakorum fault is the major fault accommodating dextral strike-slip motion NE of the western Himalayas. Furthermore, the dextral Karakorum fault in the south and the conjugate left-lateral Longmu Co–Altyn Tagh fault system in the north are thus the major strike-slip faults of western Tibet, which contribute to eastward extrusion of Tibet.},

  doi          = {10.1130/B31269.1},

  journal      = {Geological Society of America, Bulletin},

  number       = 1-2,

  volume       = 128,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 2016},

  month        = {Fri Jan 01 00:00:00 EST 2016}

}

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