The Crustal Deformation Revealed by GPS and InSAR in the Northwest Corner of the Tarim Basin, Northwestern China

Qiao, Xuejun; Yu, Pengfei; Nie, Zhaosheng; Li, Jie; Wang, Xiaoqiang; Кузиков, С. И.; Wang, Qi; Yang, Song

doi:10.1007/s00024-017-1473-6

Cited by 17 publications

(21 citation statements)

References 70 publications

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“…The decomposition of the InSAR time series clearly resolves 10 to 20 km wide zones of surface uplift centered along nearly all structures in the study area that are interpreted or known to have been active during the Quaternary (Figure ). These vertical velocities on active structures are smooth across track boundaries (Figure ) and consistent with a recent independently published decomposition of InSAR in the region [ Qiao et al ., ]. Systematic correlation between InSAR velocities and topography can arise from atmospheric phase delays.…”

Section: Resultsmentioning

confidence: 99%

Temporal changes in rock uplift rates of folds in the foreland of the Tian Shan and the Pamir from geodetic and geologic data

Bufe

Bekaert

Hussain

et al. 2017

Geophysical Research Letters

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Understanding the evolution of continental deformation zones relies on quantifying spatial and temporal changes in deformation rates of tectonic structures. Along the eastern boundary of the Pamir-Tian Shan collision zone, we constrain secular variations of rock uplift rates for a series of five Quaternary detachment-and fault-related folds from their initiation to the modern day. When combined with GPS data, decomposition of interferometric synthetic aperture radar time series constrains the spatial pattern of surface and rock uplift on the folds deforming at decadal rates of 1-5 mm/yr. These data confirm the previously proposed basinward propagation of structures during the Quaternary. By fitting our geodetic rates and previously published geologic uplift rates with piecewise linear functions, we find that gradual rate changes over >100 kyr can explain the interferometric synthetic aperture radar observations where changes in average uplift rates are greater than~1 mm/yr among different time intervals (~10 1 , 10 4-5 , and 10 5-6 years).

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Section: Resultsmentioning

confidence: 99%

Temporal changes in rock uplift rates of folds in the foreland of the Tian Shan and the Pamir from geodetic and geologic data

Bufe

Bekaert

Hussain

et al. 2017

Geophysical Research Letters

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“…As summarized below, late Quaternary shortening rates have been determined for eight structures in the western Tarim foreland [ Li , ; Li et al ., , , ; Thompson , ]. Sparse seismic activity, a weak InSAR signal, and low convergence rates from geodetic studies indicate a slow modern slip rate (<1 mm/yr) on the MPT on the northeastern Pamir margin (Figure b) [ Zubovich et al ., ; Li et al ., ; Bufe et al, ; Qiao et al ., ]. Slip rates along the westward continuation of the MPT are ~6 mm/yr during the Holocene [ Arrowsmith and Strecker , ], although minimum shortening rates since the Miocene are much lower: 0.7–0.8 mm/yr [ Coutand et al ., ].…”

Section: Late Quaternary Shortening In the Western Tarim Basinmentioning

confidence: 99%

“…6, Figure )—determined a slip rate of ~2 mm/yr and a recurrence interval of ~1.0 kyr [ Yang , ]. Together, these data broadly agree with present‐day GPS velocities across the region (Figure b) [ Mohadjer et al ., ; Ischuk et al ., ; Zubovich et al ., ] and recent InSAR analyses [ Bufe et al ., ; Qiao et al ., ] and provide a foundation to create a robust spatial and temporal framework for interpreting the deformation rates, Quaternary history, and spatial patterns in the western Tarim Basin.…”

Section: Late Quaternary Shortening In the Western Tarim Basinmentioning

confidence: 99%

Quaternary tectonic evolution of the Pamir‐Tian Shan convergence zone, Northwest China

Jobe

Chen

et al. 2017

Tectonics

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The Pamir‐Tian Shan collision zone in the western Tarim Basin, northwest China, formed from rapid and ongoing convergence in response to the Indo‐Eurasian collision. The arid landscape preserves suites of fluvial terraces crossing structures active since the late Neogene that create fault and fold scarps recording Quaternary deformation. Using geologic and geomorphic mapping, differential GPS surveys of deformed terraces, and optically stimulated luminescence dating, we create a synthesis of the active structures that delineate the timing, rate, and migration of Quaternary deformation during ongoing convergence. New deformation rates on eight faults and folds, when combined with previous studies, highlight the spatial and temporal patterns of deformation within the Pamir‐Tian Shan convergence zone during the Quaternary. Terraces spanning ~130 to ~8 ka record deformation rates between ~0.1 and 5.6 mm/yr on individual structures. In the westernmost Tarim Basin, where the Pamir and Tian Shan are already juxtaposed, the fastest rates occur on actively deforming structures at the interface of the Pamir‐Tian Shan orogens. Farther east, as the separation between the Pamir‐Tian Shan orogens increases, the deformation has not been concentrated on a single structure, but rather has been concurrently distributed across a zone of faults and folds in the Kashi‐Atushi fold‐and‐thrust belt and along the NE Pamir margin, where shortening rates vary on individual structures during the Quaternary. Although numerous structures accommodate the shortening and the locus of deformation shifts during the Quaternary, the total shortening across the western Tarim Basin has remained steady and approximately matches the current geodetic rate of 6–9 mm/yr.

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“…The faults in the Kalpingtag nappe are locked, accumulating elastic strain, but the detachment fault under the south Tian Shan is free to creep due to the weakening of friction under high-temperature conditions, driving the convergent deformation of the Kalping block (Li et al 2015). Li et al (2015) suggested that the locked area of the detachment fault extends to the north of Maidan fault based on the interseismic deformation of InSAR and GPS, while and Qiao et al (2017) proposed that the locked point of the detachment fault is at the Totgumbaz-Alpaleh fault. The two views are slightly different, but it indicates that the rupture of the Jiashi earthquake is far from the locked point of the detachment fault.…”

Section: Regional Seismic Risk Assessmentmentioning

confidence: 99%

“…Most of the convergence is not absorbed by a single predominant fault and the strain eld is roughly homogeneous. Other researchers proposed that convergence is not uniformly distributed across the Tian Shan, and the slip on the detachment fault under the Tian Shan dominates the deformation pattern and seismicity of major earthquakes Li et al 2015;Qiao et al 2017). The existence of large-scale, high slip rate and low-angle detachment fault between the Tian Shan and the foreland basin is the key indicator to distinguish the above two kinematic models.…”

Section: Introductionmentioning

confidence: 99%

Source model for the Mw 6.0 earthquake in Jiashi, China on 19 January 2020 from Sentinel-1A InSAR data

Qiao

Wei

et al. 2020

Preprint

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On January 19, 2020, an Mw 6.0 earthquake occurred in Jiashi, Xinjiang Uygur Autonomous Region of China. The epicenter was located at the basin-mountain boundary between the southern Tian Shan and the Tarim Basin. Interferometric Synthetic Aperture Radar (InSAR) is used to obtain the coseismic deformation field from both ascending and descending Sentinel-1A satellite images of the European Space Agency. The results showed that the coseismic deformation is distributed between the Kalping fault and the Ozgertaou fault. The earthquake produced significant deformation over an area of approximately 40 km by 30 km. The maximum and minimal displacements along the line of sight (LOS) are 5.3 cm and -4.2 cm for the ascending interferogram and are 7.2 cm and -3.0 cm for the descending interferogram, respectively. The fault geometry from the Multi peak Particle Swarm Optimization computation indicates that the seismogenic fault is a shallow low-dipping planar fault that is 4.58 km depth underground. The finite slip model inverted by the Steepest Descent Method implies that the rupture is dominated by a thrust fault. The slips are concentrated in a depth of 5 ~ 7 km with a maximum slip of 0.29 m. The estimated total seismic moment is 1.688×1018 Nm, corresponding to a magnitude of Mw 6.1. The seismogenic fault is the Kalping fault which has a listric structure. The coseismic deformation only occurred on the décollement layer and did not involve the ramp segment. The coseismic Coulomb stress changes have enhanced the stress on the deep margin of the Jiashi earthquake rupture area, indicating that there is still the possibility of strong earthquakes in this region in the future.

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The Crustal Deformation Revealed by GPS and InSAR in the Northwest Corner of the Tarim Basin, Northwestern China

Cited by 17 publications

References 70 publications

Temporal changes in rock uplift rates of folds in the foreland of the Tian Shan and the Pamir from geodetic and geologic data

Temporal changes in rock uplift rates of folds in the foreland of the Tian Shan and the Pamir from geodetic and geologic data

Quaternary tectonic evolution of the Pamir‐Tian Shan convergence zone, Northwest China

Source model for the Mw 6.0 earthquake in Jiashi, China on 19 January 2020 from Sentinel-1A InSAR data

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