Low Quaternary slip rate reconciles geodetic and geologic rates along the Altyn Tagh fault, northwestern Tibet

Geology ◽  
2009 ◽  
Vol 37 (7) ◽  
pp. 647-650 ◽  
Author(s):  
Eric Cowgill ◽  
Ryan D. Gold ◽  
Chen Xuanhua ◽  
Wang Xiao-Feng ◽  
J Ramón Arrowsmith ◽  
...  
Keyword(s):  
Slip Rate ◽  
Altyn Tagh Fault ◽  
Altyn Tagh

Slowing extrusion tectonics: lowered estimate of post-Early Miocene slip rate for the Altyn Tagh fault

2004 ◽  
Vol 217 (1-2) ◽  
pp. 111-122 ◽  
Author(s):  
Yongjun Yue ◽  
Bradley D. Ritts ◽  
Stephan A. Graham ◽  
Joseph L. Wooden ◽  
George E. Gehrels ◽  
...  
Keyword(s):  
Slip Rate ◽  
Early Miocene ◽  
Altyn Tagh Fault ◽  
Altyn Tagh

scholarly journals INTERSEISMIC DEFORMATION ACROSS THE EASTERN ALTYN TAGH FAULT FROM INSAR MEASUREMENTS

2018 ◽  
Vol XLII-3 ◽  
pp. 1029-1033
Author(s):  
C. J. Liu ◽  
C. Y. Zhao ◽  
L. Y. Ji ◽  
Z. R. Zhang ◽  
H. Sun
Keyword(s):  
Low Cost ◽  
Slip Rate ◽  
Deformation Monitoring ◽  
Altyn Tagh Fault ◽  
Altyn Tagh ◽  
Interseismic Deformation ◽  
Multi Temporal ◽  
New Type ◽  
Fault Slip Rate ◽  
Better Than

As a new type of earth observation technique, InSAR has a lot of advantages, such as all-weather, all-time, high precision, high density, wide coverage and low cost. It has been widely used in deformation monitoring. Taking the eastern segment of Altyn Tagh fault (ATF) as the object of the research, this paper discussed the application of multi-temporal InSAR technology in the field of interseismic deformation monitoring. We measured the interseismic deformation along the eastern section of ATF using three neighboring descending tracks SAR data from the ERS and Envisat missions. The results show that, first, the validation of InSAR results is better than 2.5 mm/yr, the calibration of InSAR results is about 1.06 mm/yr. Second, the fault slip rate in this segment is about 4–7 mm/yr, and is in the locked condition. Third, The InSAR velocity profile across the fault is the clear asymmetry with respect to ATF, it may be the combined effect of northern (NATF) and southern (SATF) branches of ATF.

scholarly journals Segmentation and termination of the surface rupture zone produced by the 1932 Ms 7.6 Changma earthquake: New insights into the slip partitioning of the eastern Altyn Tagh fault system

Lithosphere ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 19-39
Author(s):  
Jiaxin Du ◽  
Bihong Fu ◽  
Qiang Guo ◽  
Pilong Shi ◽  
Guoliang Xue ◽  
...  
Keyword(s):  
Slip Rate ◽  
Rupture Zone ◽  
Fault System ◽  
Surface Rupture ◽  
Altyn Tagh Fault ◽  
Slip Rates ◽  
Leading Role ◽  
Surface Rupture Zone ◽  
Altyn Tagh ◽  
Slip Partitioning

Abstract The 1932 Ms 7.6 earthquake struck the active Changma fault in the NE Tibetan Plateau, and produced a distinct surface rupture along the fault zone. However, the segmentation and termination of the surface rupture zone are still unclear. In this paper, the active tectonic analyses of multiple satellite images complemented by field investigations present the 120-km-long surface rupture zone, which can be divided into five discrete first-order segments, ranging from 14.4 to 39.56 km in length, linked by step-overs. Our results also indicate that the 1932 rupture zone could jump across step-overs 0.3–4.5 km long and 2.2–5.4 km wide in map view, but was terminated by a 6.3-km-wide restraining step-over at the eastern end. The left-lateral slip rates along the mid-eastern and easternmost segments of the Changma fault are 3.43 ± 0.5 mm/yr and 4.49 ± 0.5 mm/yr since 7–9 ka, respectively. The proposed tectonic models suggest that the slip rates on the Changma fault are similar to the slip rate on the eastern segment of the Altyn Tagh fault system near the junction point with the Changma fault. These results imply that the Changma fault plays a leading role in the slip partitioning of the easternmost segment of the Altyn Tagh fault system.

scholarly journals Late Quaternary slip rate of the Aksay segment and its rapidly decreasing gradient along the Altyn Tagh fault

Geosphere ◽  
2020 ◽  
Vol 16 (6) ◽  
pp. 1538-1557
Author(s):  
Jinrui Liu ◽  
Zhikun Ren ◽  
Wenjun Zheng ◽  
Wei Min ◽  
Zhigang Li ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Temporal Distribution ◽  
Slip Rate ◽  
Fault Slip ◽  
Strain Partitioning ◽  
Altyn Tagh Fault ◽  
Altyn Tagh ◽  
Fault Slip Rate ◽  
Partitioning Pattern ◽  
Rate Gradient

Abstract Constraining the fault slip rate on a fault can reveal the strain accumulation and partitioning pattern. The Aksay segment, the eastern segment of the Altyn Tagh fault, as the starting area where the slip rate of the Altyn Tagh fault decreases, is a strain partitioning zone. The spatial and temporal distribution of its fault slip rate is of great significance to clarify the strain-partitioning pattern of the eastern Altyn Tagh fault. In this study, we determined the slip rates at four sites along the Aksay segment. The results demonstrated that the slip rate decreases dramatically, with an overwhelmingly high slip gradient of ∼9.8 mm/yr/100 km (a 9.8 mm/yr reduction of slip rate occurs over a distance of 100 km) within a distance of ∼50 km. The slip rate gradient along strike at the Aksay segment is four times that of the Subei segment to the eastward termination of the Altyn Tagh fault. Our results indicate that the slip rate gradient along the Altyn Tagh fault is not uniform and decreases eastward with variable slip rate gradients on different segments, resulting in the uplift of the mountains oblique to the Altyn Tagh fault.

Constant slip rate during the late Quaternary along the Sulu He segment of the Altyn Tagh Fault near Changma, Gansu, China

Island Arc ◽  
2010 ◽  
Vol 20 (1) ◽  
pp. 94-106 ◽  
Author(s):  
Yeong Bae Seong ◽  
Hee Cheol Kang ◽  
Jin‐Han Ree ◽  
Chaolu Yi ◽  
Hyeon Yoon
Keyword(s):  
Late Quaternary ◽  
Slip Rate ◽  
Altyn Tagh Fault ◽  
Altyn Tagh

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>

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