scholarly journals Late Quaternary left-lateral strike slip rate along the Anninghe-Zemuhe Section of the Xianshuihe-Xiaojiang Fault System and its implication to the clockwise block rotation of the SE margin of the Tibetan Plateau

2021 ◽  
Author(s):  
mengmeng Hu ◽  
zhonghai wu ◽  
jiacun Li ◽  
keqi Zhang ◽  
Klaus Reicherter ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Slip Rate ◽  
Strike Slip ◽  
Fault System ◽  
The Tibetan Plateau ◽  
Block Rotation ◽  
Lateral Strike Slip ◽  
Xiaojiang Fault

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.

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.

scholarly journals Late Quaternary slip rate of the South Heli Shan Fault (northern Hexi Corridor, NW China) and its implications for northeastward growth of the Tibetan Plateau

Tectonics ◽  
2013 ◽  
Vol 32 (2) ◽  
pp. 271-293 ◽  
Author(s):  
Wen-Jun Zheng ◽  
Pei-Zhen Zhang ◽  
Wei-Peng Ge ◽  
Peter Molnar ◽  
Hui-Ping Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Slip Rate ◽  
Hexi Corridor ◽  
The Tibetan Plateau ◽  
The South ◽  
Nw China

scholarly journals Late Quaternary left-lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau

Tectonics ◽  
2009 ◽  
Vol 28 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chuanyou Li ◽  
Pei-zhen Zhang ◽  
Jinhui Yin ◽  
Wei Min
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Slip Rate ◽  
The Tibetan Plateau

East Tacheng (Qoqek) Fault Zone: Late Quaternary Tectonics and Slip Rate of a Left‐Lateral Strike‐Slip Fault Zone North of the Tian Shan

Tectonics ◽  
2021 ◽  
Vol 40 (2) ◽  
Author(s):  
Jingxing Yu ◽  
R. T. Walker ◽  
E. J. Rhodes ◽  
Peizhen Zhang ◽  
Chaopeng Li ◽  
...  
Keyword(s):  
Fault Zone ◽  
Late Quaternary ◽  
Slip Rate ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Lateral Strike Slip ◽  
Tian Shan

scholarly journals The Dzhungarian fault: Late Quaternary tectonics and slip rate of a major right-lateral strike-slip fault in the northern Tien Shan region

2013 ◽  
Vol 118 (10) ◽  
pp. 5681-5698 ◽  
Author(s):  
G. E. Campbell ◽  
R. T. Walker ◽  
K. Abdrakhmatov ◽  
JL. Schwenninger ◽  
J. Jackson ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Slip Rate ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Tien Shan ◽  
Lateral Strike Slip ◽  
Northern Tien Shan

Present-day stress and deformation field within the Sulawesi Island area (Indonesia) : geodynamic implications

2003 ◽  
Vol 174 (3) ◽  
pp. 305-317 ◽  
Author(s):  
Thierry Beaudouin ◽  
Oliver Bellier ◽  
Michel Sebrier
Keyword(s):  
Slip Rate ◽  
The Philippines ◽  
Strike Slip ◽  
Fault System ◽  
Block Rotation ◽  
Stress Regime ◽  
The North ◽  
North Sulawesi ◽  
Stress And Deformation ◽  
Central Sulawesi

Abstract Sulawesi Island, eastern Indonesia, is located at the junction between the Pacific-Philippine, Indo-Australian Plates, and the Sunda Block, i.e., the southeastern edge of the Eurasian Plate (fig. 1). Its peculiar shape results from an on-going complex history of collision and rotation of continental slivers, island arcs, and oceanic domains with respect to the Sunda Block. Seismic network document a high level of seismicity in its northern boundaries, corresponding to deformation along the North Sulawesi trench and within the Molucca Sea subduction (fig. 1). Seismic activity is lower in central and south Sulawesi (fig. 4). It represents the activity of the NE, SW and SE arms thrust and the left-lateral Central Sulawesi Fault System, which comprises the Palu-Koro and Matano fault zones. This system connects, from northwest to southeast, the North Sulawesi Subduction zone to the Sorong fault (through th Sud Sula fault, after, Hinschberger et al. [2000] and the Tolo thrust in the North Banda Sea, Silver et al., [1983] proposed a deformation model that implies a clockwise rotation of the Sula block that is limited to the west and south by the Central Sulawesi Fault System. Paleomagnetic [Surmont et al., 1994] and GPS [Walpersdorf et al., 1998a] studies confirm and measure this rotation. In order to discus the present day kinematics and deformation of Sulawesi area, we performed a seismotectonic study, using focal mechanism of moderate and large (Mw ≥ 5) shallow earthquake (≤ 60 Km), collected from the Harverd CMT database (period 1976 to 2001) and complemented by Fitch [1972] and Cardwell [1980] (period 1964–1976). From these focal mechanisms and the known structural context, we defined ten homogeneous deformation domains (fig. 3 et fig.5). For seven of these, focal solution and moment tensors were inverted (Carey-Gailhardis and Mercier method [1987Carey-Gailhardis and Mercier method [1992]) and summed, in order to obtain stress and deformation tensors and rate estimates (Brune [1968] or Kostrov [1974] methods). Results are presented in table I, on figure 2 and figure 3. In northern Molucca Sea (north of equvator), the fast convergence slip rate (75 mm/a) is absorbed by the Sangihe subduction and accommodates the major part of the Philippines/Sunda plates motion. South of the equator, the estimated slip rate is only 2 mm/yr and represents the Sangihe slap subduction, which is affected by a torsion from NNE to E strike. Along the North-Sulawesi fault system, direction of the stress axes are not significantly different from east to west (average N356°±5E), but the determined slip rates increase from 20±4 mm/a to 54±10 mm/a, respectively. These values agree with the Sula block rotation pole previously proposed and located at the eastern extremity of the Northern Arm. The Palu-Koro fault, bounding the western Sula block, contributes to this rotaion because its trace fits well a small circle centered on the pole. However, seisicity document few moderate magnitude earthquake (fig. 4) related to the left lateral Central Sulawesi fault system, despite many identified active tectonic feature [Beaudouin, 1998]. Moreover, geologically determined Palu-Koro long-term slip rate of 35±8 mm/a, [Bellier et al., 2001] agrees with the far-field strike-slip rate of 32–45 mm/a proposed from GPS measurement [Walpersdorf et al., 1998b ; Stevens et al., 1999]. This confirms that is a fast slipping fault with a relatively low level of seismicity. The southeastern limit of the Sula block is represented by the ENE-trending Sorong strike-slip fault that extends from Irian-Jaya island to the east coast of Sulawesi where it connects to the Matano fault through the South Sula fault, This structure is particularly active south of the Sula island with a major Mw=7.7 earthquake (29/11/98). The inversion provides a strike-slip regime with respectively N220°E and N310°E-trending σ1. and σ3 stress axes. This study also highlight the Sula block internal deformation that could explain in the GPS velocities model obtained by walpersdorf et al. [1998a] for the Sula block rotation. We evidence an extensional stress regime with a N030°E-trending σ3, in the southern part of the Tomini Gulf. The estimated extension rate is 9 mm/a toward a N036°E direction. Considering the location of the Tomini Gulf, this deformation could be interpreted as a back-arc spreading related to the North Sulawesi subduction. The Batui zone correspond to the domain of the collision wich occured in the early-middle Plicene [e.g., Velleneuve et al., 2000] between the NE arm and the Irian-jaya derived Banggaï-Sula block. This domain remains active (12 earthquake with a major one of Mw=7.6, 14/05/00, fig. 4) but is mainly affected by strike-slip deformation. The Tolo thrust, lying off the SE arm east coast, absorbs the convergence to the west of the North Banda Sea, as attested by six moderate earthquake with reverse faulting focal mechanisms. This allows to distinguish a North-Banda block in SE Sulawesi, bounded by the South Sula segment of the Sorong fault, the Tolo thrust and the Hamilton fault (fig. 5) and moving westward at a lower rate than the Sula block. The SW arm of Sulawesi is also characterised by a compressional stress regime with N099°E-trending σ1 and an estimated convergence rate of 8.5 mm/a toward a N080°E direction. This is the consequence of the Majene-Kalosi thrust activity and could represent the most western accommodation of the Philippines/Sunda plates motion.

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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