Transformation of displacement between strike-slip and crustal shortening in the northern margin of the Tibetan Plateau: Evidence from decadal GPS measurements and late Quaternary slip rates on faults

2013 ◽  
Vol 584 ◽  
pp. 267-280 ◽  
Author(s):  
Wen-jun Zheng ◽  
Pei-zhen Zhang ◽  
Wen-gui He ◽  
Dao-yang Yuan ◽  
Yan-xiu Shao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Strike Slip ◽  
The Tibetan Plateau ◽  
Gps Measurements ◽  
Slip Rates ◽  
Crustal Shortening ◽  
Northern Margin

scholarly journals OSL dating of the late Quaternary slip rate on the Gyaring co Fault in central Tibet

2016 ◽  
Vol 43 (1) ◽  
pp. 162-173 ◽  
Author(s):  
Duo Wang ◽  
Gong-Ming Yin ◽  
Xu-Long Wang ◽  
Chun-Ru Liu ◽  
Fei Han ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Slip Rate ◽  
Strike Slip ◽  
Alluvial Fan ◽  
Osl Dating ◽  
The Tibetan Plateau ◽  
Slip Rates ◽  
Absolute Age ◽  
Central Tibet

Abstract The Gyaring Co Fault (GCF) is an active right-lateral strike-slip fault in central Tibet that accommodates convergence between India and Asia in the interior of the Tibetan Plateau. The average long-term slip rate of the fault remains controversial, given the absence of absolute age data of faulted geomorphic features. We have applied optically stimulated luminescence (OSL) dating to the northern segment of the GCF, revealing that the GCF has displaced alluvial fans at Aerqingsang by 500 ± 100 m since their deposition at ~109 ka, yielding a slip rate of 4.6 ± 1.0 mm/yr. A slip rate of 3.4 ± 0.4 mm/yr is inferred from analysis of an alluvial fan with an offset of 65 ± 5 m (~19 ka) at Quba site 1. The Holocene slip rate is estimated to be 1.9 ± 0.3 mm/yr, as inferred from the basal age (~8.3 ka) of terrace T1 that has a gully displacement of 16 ± 2 m at Quba site 2. These slip rates are generally lower early estimates (10–20 mm/yr), but are consistent with more recent results (2.2–4.5 mm/yr) and GPS data for other strike-slip faults in this region, indicating that deformation may be distributed across the entire Tibetan Plateau. Moreover, we suggest that the slip rate along the GCF may have decreased slightly during the late Quaternary.

Late Quaternary right-lateral slip rates of faults adjacent to the lake Qinghai, northeastern margin of the Tibetan Plateau

2011 ◽  
Vol 123 (9-10) ◽  
pp. 2016-2030 ◽  
Author(s):  
D.-Y. Yuan ◽  
J.-D. Champagnac ◽  
W.-P. Ge ◽  
P. Molnar ◽  
P.-Z. Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
The Tibetan Plateau ◽  
Lake Qinghai ◽  
Slip Rates

New constraints on Quaternary slip partitioning near the eastern termination of the Altyn Tagh Fault 

2021 ◽  
Author(s):  
Nimrod Wieler ◽  
Amit Mushkin ◽  
Eitan Shelef ◽  
Huiping Zhang ◽  
Amir Sagy ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Slip Rate ◽  
Alluvial Fan ◽  
Luminescence Dating ◽  
The Tibetan Plateau ◽  
Altyn Tagh Fault ◽  
Slip Rates ◽  
Altyn Tagh ◽  
Slip Partitioning

<p>Slip partitioning along the northern boundary of the Tibetan Plateau is essential for understanding regional deformation and the seismic potential of the different faults that accommodate it. Within this framework the Altyn Tagh Fault (ATF) is commonly viewed as the primary structure that separates the Tibetan Plateau from the stable Gobi-Alashan block to the north. Late Quaternary sinistral slip rates of 8-12 mm/yr across the central ATF between 86° and 93°E decrease eastwards to zero as the fault approaches its mid-continental termination at ~97°E. To better understand how late Quaternary slip is partitioned along the ATF’s eastern termination we obtained new slip-rate measurements  for the ~200-km-long left-lateral ENE striking Sanweishan Fault (SSF) located ~60 km north of the ATF between 94°-96°E near the town of Dunhuang.</p><p>Multiple sinistral offsets ranging up to 600 m were identified by linking the clast assemblage of offset alluvial fan remnants with their provenance upstream of the fault.  Luminescence dating revealed depositional ages ranging from 100 - 200 ka for the offset features and time-invariant minimum sinistral slip of 2.5±1 mm/yr during the last ~200 ka, which is approximately an order of magnitude higher than previously reported slip-rates for the SSF. Our results indicate that the SSF and the eastern segment of the ATF accommodate comparable magnitudes of late Quaternary slip. Considering this substantial transfer of lateral slip as far as 60 km north of the eastern ATF we propose that the SSF may represent juvenile northeastward expansion of the Tibetan Plateau into previously stable parts of the Gobi-Alashan block.</p>

scholarly journals Late Quaternary slip rates of the thrust faults in western Hexi Corridor (Northern Qilian Shan, China) and their implications for northeastward growth of the Tibetan Plateau

Geosphere ◽  
2013 ◽  
Vol 9 (2) ◽  
pp. 342-354 ◽  
Author(s):  
Zheng Wen-Jun ◽  
Zhang Hui-Ping ◽  
Zhang Pei-Zhen ◽  
Peter Molnar ◽  
Liu Xing-Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Hexi Corridor ◽  
The Tibetan Plateau ◽  
Thrust Faults ◽  
Slip Rates

Geological and Geomorphological Evidence for Activity along the Motuo Fault, Eastern Side of the Namche Barwa Syntaxis, Tibetan Plateau

2021 ◽  
Author(s):  
Chao Xie ◽  
Bengang Zhou ◽  
Fan Yang ◽  
Zhengfang Li ◽  
Yueju Cui ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Movement Pattern ◽  
Strike Slip ◽  
The Tibetan Plateau ◽  
Southeastern Part ◽  
Strong Activity ◽  
Lateral Strike Slip ◽  
Namche Barwa ◽  
Late Pleistocene To Holocene

Abstract The Motuo fault (MTF) strikes along the Yarlung Zangbo suture zone on the eastern boundary of the Namche Barwa syntaxis. The movement pattern and Quaternary activity of the MTF remain unclear, which hampers efforts to undertake meaningful seismic hazard assessments near the southeastern part of the Tibetan plateau and to understand the tectonic evolution of the Namche Barwa syntaxis. In this study, the MTF is shown to feature left-lateral strike-slip movements with offset gullies and mountain ridges and appears to have ruptured during the late Pleistocene to Holocene, as evidenced from geological, paleoseismic, and radiocarbon dating investigations. Specifically, at least three surface-rupturing paleoseismic events are revealed; two events occurred after 2606 B.P. and after 18.2 ka. Combining this information with previous Global Positioning System results in southeastern Tibet, we suggest that, as a boundary fault, the MTF regulates the movements of the Namche Barwa and Chayu blocks. The velocity difference between the two blocks advancing to the north is the main mechanism of left-lateral strike-slip motion along the MTF. The accumulation and release of shear stress between the two blocks have led to strong activity along the MTF, since the late Quaternary.

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