Growth of the Tian Shan Drives Migration of the Conglomerate‐Sandstone Transition in the Southern Junggar Foreland Basin

Li, Chao; Wang, Sheng Li; Li, Yongxiang; Chen, Yan; Sinclair, H. Q.; Wei, Dongtao; Ma, Dawei; Lu, Huayu; Wang, Liangshu

doi:10.1029/2021gl097545

Cited by 6 publications

(5 citation statements)

References 54 publications

(110 reference statements)

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“…Similar studies have been carried out at the Junggar Basin, Chu Basin in the northern Tian Shan forelands, and Kashi foreland in the southwest Tian Shan (Figure 14a). At the southern Junggar Basin, the basinward growth of the northern Tian Shan orogenic front has been analyzed through gravel wedges that have prograded over the foreland (Charreau et al., 2009; C. Li et al., 2022). The long‐term sediment progradation rate in this region is slower than that in Kuqa (Figure 14d).…”

Section: Discussionmentioning

confidence: 99%

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Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

Cheng

Chen

et al. 2023

Tectonics

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The India-Eurasia collision caused the uplift of the Tibetan Plateau and extensive intracontinental deformation over a broad area of Asia during the Cenozoic. Located more than 1,000-2,000 km to the north of this collision zone, the 2,500-km-long Tian Shan, with numerous peaks over 7,000 m, is a seismically active orogenic belt and has experienced Cenozoic tectonic reactivation and rapid uplift since the Miocene (

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Section: Discussionmentioning

confidence: 99%

“…Zhang et al., 2014; 9‐Charreau et al., 2018; 10‐C. Li et al., 2022; 11‐Charreau et al., 2008; 12‐Zhou et al., 2020; 13‐Lu et al., 2010; 14‐Qiu et al., 2019). Values of crustal shortening across the western and eastern Tian Shan are from Avouac et al.…”

Section: Discussionmentioning

confidence: 99%

Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

Cheng

Chen

et al. 2023

Tectonics

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“…The long seismic profile was constructed by combining different 2-D seismic profiles across the basin. The boundaries of strata in the seismic profile were determined based on well logging, outcrop data near the profile, and interpretations from previous publications [46,[53][54][55].…”

Section: Geological Backgroundmentioning

confidence: 99%

Modern Southern Junggar Foreland Basin System Adjacent to the Northern Tian Shan, Northwestern China

Wang

et al. 2022

Lithosphere

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Building-up of the modern Tian Shan range due to the India-Eurasia collision induces the flexural subsidence of the southern Junggar block. The sedimentary infill and subsidence in the southern Junggar foreland basin recorded the growth of the northern Tian Shan. We analyze four seismic profiles, well logging data, and trends in stream morphology in the foreland basin to decipher its architecture, and stratigraphic and subsidence history. The southern Junggar foreland basin system can be divided into the northern Tian Shan wedge-top, Lakes Aiby-Fangcao-Baijiahai foredeep and Luliang forebulge and backbulge depozones. The seismic profiles present the active shortening structures in the wedge top and the northward thinning and onlapping Neogene-Quaternary foreland sequence in the foredeep. The growth strata and unconformities separating the growth and pregrowth strata in the upper part of the foreland sequence are identified in the wedge top depozone. This indicates that the competition between active local folding relief and regional bedrock subsidence determines erosion versus deposition in the wedge top. The logging data of well GQ2 reveal that the present wedge-top depozone evolved from distal lake sedimentation, probably in a foredeep setting, to a braided river in a modern piedmont setting. These lines of sedimentary evidence and the active shortening structures reveal the northward migration process of the southern Junggar foreland basin driven by the northward propagation of the Tian Shan since the Neogene. The north-northeast dipping topography of the northern Tian Shan thrust wedge controls the north-northeastward flowing of all the rivers in the wedge top, and these rivers’ flowing direction changes in the foredeep depozone where the tectonic landform flatten out. Growth of anticlines in the front of the wedge-top depozone may have triggered a northward migration of the meandering channel of the Manas river in its lower reach. The transition between the trends of the stream morphology in the wedge top and foredeep depozones suggests the control of the structures of the foreland basin system on trends in stream morphology.

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“…The Tian Shan is an active intracontinental orogenic belt that extends east-west for 2500 km and south-north for 250-350 km, making it one of the most significant orogenic belts in the world. Since the Quaternary period, the Tian Shan has undergone strong tectonic deformation such as compression and uplift, and rapid north-south crustal shortening [3,[7][8][9][10][11]. Faults of the Tian Shan accommodate the crustal shortening, which includes the E-W trending thrust faults [3,[12][13][14][15], the ENE-WSW trending sinistral strike-slip…”

Section: Introductionmentioning

confidence: 99%

Evidence of Dextral Strike-Slip Movement of the Alakol Lake Fault in the Western Junggar Based on Remote Sensing

Yi,

Li,

et al. 2024

Preprint

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The NW-SE trending dextral strike-slip faults on the north side of the Tian Shan play an important role in accommodating the crustal shortening, which mainly includes the Karatau fault, Talas-Fergana fault, Dzhalair-Naiman fault, Aktas fault, Dzhungarian fault (also named Bolokenu-Aqikekuduk fault) and Chingiz fault. The classic viewpoint is that the strike-slip fault is the adjustment product caused by the difference of the crustal shortening from west to east. Another viewpoint attributes the dextral strike-slip fault to large-scale sinistral shearing. The Alakol Lake Fault is situated along the northern margin of the Dzhungarian Gate, stretching for roughly 150 km from Lake Ebinur to Lake Alakol. Our team utilized aerial photographs, Satellite Stereo-imagery, and field observation to map the distribution of the Alakol Lake fault. Our findings provided evidence supporting the assertion that the fault is a dextral strike-slip fault. In reference to its spatial distribution, Lake Alakol is situated in a pull-apart basin that lies between two major dextral strike-slip fault lines: the Chingiz and Dzhungarian faults. The Alakol Lake Fault serves as a connecting point for these two faults, resulting in the formation of a mega NW-SE dextral strike-slip fault zone. According to our analysis of the dating samples taken from the alluvial fan, as well as our measurement of the displacement of the riser and gully, it appears that the Alakol Lake fault has a dextral strike-slip rate of 0.8-1.5mm/yr. The strike-slip rate of the Alakol Lake fault is comparatively higher than that of the Chingiz fault in the northern region (~0.7 mm/yr), but slower than that of the Dzhungarian fault in the southern (3.2-5 mm/yr). The Chingiz-Alakol-Dzhungarian fault zone shows a gradual decrease in deformation towards the interior of the Kazakhstan platform. We contend that the rate of deformation observed is better explained by the crustal shortening adjustment model, rather than the large-scale sinistral shearing model.

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Growth of the Tian Shan Drives Migration of the Conglomerate‐Sandstone Transition in the Southern Junggar Foreland Basin

Cited by 6 publications

References 54 publications

Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

Modern Southern Junggar Foreland Basin System Adjacent to the Northern Tian Shan, Northwestern China

Evidence of Dextral Strike-Slip Movement of the Alakol Lake Fault in the Western Junggar Based on Remote Sensing

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