Fault locking and slip rate deficit of the Haiyuan-Liupanshan fault zone in the northeastern margin of the Tibetan Plateau

2016 ◽  
Vol 102 ◽  
pp. 47-57 ◽  
Author(s):  
Yanchuan Li ◽  
Xinjian Shan ◽  
Chunyan Qu ◽  
Zhenjie Wang
Keyword(s):  
Tibetan Plateau ◽  
Fault Zone ◽  
Slip Rate ◽  
The Tibetan Plateau ◽  
Fault Locking

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

scholarly journals Lhasa seismicity during 2004-2006

2008 ◽  
Vol 38 ◽  
pp. 9-14
Author(s):  
Tsoja Wangmo ◽  
Norsang Gelsor ◽  
Jens Havskov ◽  
Nima Puntsog ◽  
Baima Tsering
Keyword(s):  
Tibetan Plateau ◽  
Active Region ◽  
Fault Zone ◽  
Seismic Activity ◽  
Measured Data ◽  
Seismic Network ◽  
The Tibetan Plateau ◽  
Seismic Region ◽  
Set Up

The Tibetan Plateau is an active seismic region due to the collision between Indian and Eurasian plates. We have set up a new seismic network in the heart of the Tibetan Plateau, in the Lhasa region, to detect seismic activities. The measured data show that Lhasa is a seismically active region where at least 716 earthquakes were detected and a total of 218 events of magnitude greater than 2.0 occurred in the period between January 2004 and July 2006. Out of them, 11 earthquakes had a magnitude greater than 5.0. A high seismic activity was observed along the Dangshung fault zone.

scholarly journals Effects of Erosion and Deposition on Constraining Vertical Slip Rates of Thrust Faults: A Case Study of the Minle–Damaying Fault in the North Qilian Shan, NE Tibetan Plateau

2021 ◽  
Vol 9 ◽  
Author(s):  
Qingri Liu ◽  
Huiping Zhang ◽  
Youli Li ◽  
Feipeng Huang ◽  
Xudong Zhao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Slip Rate ◽  
Simulation Method ◽  
The Tibetan Plateau ◽  
Stratigraphic Sequence ◽  
Erosion And Deposition ◽  
Slip Rates ◽  
The North ◽  
Vertical Fault ◽  
Fault Displacement

The height of a thrust-fault scarp on a fluvial terrace would be modified due to erosion and deposition, and these surface processes can also influence the dating of terraces. Under such circumstances, the vertical slip rate of a fault can be misestimated due to the inaccurate displacement and/or abandonment age of the terrace. In this contribution, considering the effect of erosion and deposition on fault scarps, we re-constrained the vertical slip rate of the west end of the Minle–Damaying Fault (MDF), one of the thrusts in the north margin of the Qilian Shan that marks the northeastern edge of the Tibetan Plateau. In addition, we tried to explore a more reliable method for obtaining the vertical fault displacement and the abandonment age of terraces with AMS 14C dating. The heights of the surface scarps and the displacements of the fluvial gravel layers exposed on the Yudai River terraces were precisely measured with the Structure from Motion (SfM) photogrammetry and the real-time kinematic (RTK) GPS. The Monte Carlo simulation method was used to estimate the uncertainties of fault displacements and vertical slip rates. Based on comparative analysis, the dating sample from the fluvial sand layer underlying the thickest loess in the footwall was suggested to best represent the abandonment age of the terrace, and the fluvial gravel layer could better preserve the original vertical fault displacement compared with the surface layer. Using the most reliable ages and vertical offsets, the vertical slip rate of the MDF was estimated to be 0.25–0.28 mm/a since 42.3 ± 0.5 ka (T10) and 0.14–0.24 mm/a since 16.1 ± 0.2 ka (T7). The difference between the wrong vertical slip rate and the right one can even reach an order of magnitude. We also suggest that if the built measuring profile is long enough, the uncertainties in the height of a surface scarp would be better constrained and the result can also be taken as the vertical fault displacement. Furthermore, the consistency of chronology with stratigraphic sequence or with terrace sequence are also key to constraining the abandonment ages of terraces. The fault activity at the study site is weaker than that in the middle and east segments of the MDF, which is likely due to its end position.

Huge Landslides along the Jinsha River in Southeastern Tibetan Plateau and Their Association with the Recent Activity of Jinsha River Fault Zone

2020 ◽  
Author(s):  
Zufeng Chang ◽  
Hao Chang ◽  
Zebin Mao ◽  
Ruojin Guo
Keyword(s):  
Tibetan Plateau ◽  
Fault Zone ◽  
Large Scale ◽  
Late Quaternary ◽  
Average Rate ◽  
Economic Losses ◽  
The Tibetan Plateau ◽  
Jinsha River ◽  
Water Storage Capacity ◽  
Barrier Lake

<p>     The Jinsha river fault zone in the eastern margin of the Tibetan Plateau is an old suture structure after the shutting of the proto-Tethys and a large scale ultra-lithosphere fault zone consisted of  5 to 6 fault branches with a width of 50km, have a long  geological evolution history. Since late Quatery, this fault zone is mainly dominated by dextral strike slip with partial thrusting component, absorbing  partial energy of the extrusion movement of  Tibetan Plateau. Along the fault zone, lower terraces of Jinsha river at Muronglou, Buzhong, Langzhong, Guxue, etc. were displaced, indicating the fault zone is active in late Quaternary, with an average rate of 3.5～4.3mm/ /yr. horizontally and 0.9-1.1mm/yr. vertically respectively in Holocene. Influenced by the intense fault activity of Jinsha river fault zone, this region is characterized by fractured rocks, strongly weathered surfaces.</p><p>      The Jinsha river, the upstream of the Yangtze river, parallel to Jinshajiang fault zone, flows from north to south, forming deep river valley and huge terrain elevation difference. Numerous huge landslides have developed along the river, for example, there are 23 giant avalanches in the 38 km long reach from Narong to Rongxue, with general volumes of 10~70 million m<sup>3</sup> and even up to several hundreds million m<sup>3</sup>. Moreover, the landslides produce many loose clastic fragments which detonate many debris flows and river blocking. The latest disaster event is the Baige barrier lake in 2018 caused by landslide, with a water storage capacity of 524 million m<sup>3</sup>, causing tens of billions of yuan of economic losses. These landslides are distributed along the fault and its two sides, suggesting that these huge avalanches are closely related to the intense activity of the fault zone and special topography.</p><p>Keywords: Huge landslide, Jinsha River, Jinsha River Fault Zone, late Quatery activity</p>

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