Sedimentology and magnetostratigraphy of the Tierekesazi Cenozoic section in the foreland region of south West Tian Shan in Western China

Chen, Xinwei; Chen, Hanlin; Cheng, Xiaogan; Shen, Zhongyan; Lin, Xiubin

doi:10.1016/j.tecto.2015.05.009

Cited by 23 publications

(44 citation statements)

References 96 publications

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“…22 Ma from Miocene strata in the Tierekesazi and Baxubulak magnetostratigraphic sections supports this timing (locations in Fig. 1; Chen et al, 2015;Tang et al, 2015). Moreover, samples from the westward continuation of the Kashi Basin thrust near the Kuzigongsu River yielded AFT cooling ages of 13.6 ± 2.2 Ma (Figs.…”

Section: Western Southern Tian Shansupporting

confidence: 53%

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Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

Jobe

Bookhagen

et al. 2018

Lithosphere

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Cosmogenic burial dating enables dating of coarse-grained, Pliocene-Pleistocene sedimentary units that are typically difficult to date with traditional methods, such as magnetostratigraphy. In the actively deforming western Tarim Basin in NW China, Pliocene-Pleistocene conglomerates were dated at eight sites, integrating 26 Al/ 10 Be burial dating with previously published magnetostratigraphic sections. These samples were collected from growth strata on the flanks of growing folds and from sedimentary units beneath active faults to place timing constraints on the initiation of deformation of structures within the basin and on shortening rates on active faults. These new basin-fill and growthstrata ages document the late Neogene and Quaternary growth of the Pamir and Tian Shan orogens between >5 and 1 Ma and delineate the eastward propagation of deformation at rates up to 115 km/m.y. and basinward growth of both mountain belts at rates up to 12 km/m.y.

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Section: Western Southern Tian Shansupporting

confidence: 53%

“…Using the range of sediment-accumulation rates (200-900 m/m.y.) for the Atushi Formation from the Kashi-Atushi foldand-thrust belt along strike (Chen et al, 2002;Heermance et al, 2008;Chen et al, 2015), this section corresponds to ~3.9-17.5 m.y. of time ( Fig.…”

Section: Researchmentioning

confidence: 99%

Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

Jobe

Bookhagen

et al. 2018

Lithosphere

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“…(), change in cooling rates between 25 Ma and 20 Ma and between 15 Ma and 5 Ma can be related to regional‐scale tectonic events. Sedimentation rates in the northern part of the Tarim basin show an acceleration around ~12 Ma which seems related to the regional tectonic activity (Charreau et al., ; Chen, Chen, Cheng, Shen, & Lin, ; Jia, Fu, Jolivet, & Zheng, ). In our models, the cooling rate of samples near the right shear zone also increases at around 10 Ma.…”

Section: Comparison With the Tien Shan Beltmentioning

confidence: 99%

Impact of range‐parallel sediment transport on 2D thermo‐mechanical models of mountain belts: Application to the Kyrgyz Tien Shan

et al. 2018

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Evolving mountain belts dynamics is very sensitive to surface processes. The surface processes affect tectonics by enhancing crust exhumation and thermal weakening, and depositing soft yet cold sediments in surrounding basins. While 2D plane strain models approximate cylindrical tectonic structures well, simple 1D mass transfer cannot capture erosion-sedimentation complexity. The Eastern Kyrgyz Tien Shan, where structures, basins and exhumation rates are well constrained, is used here to illustrate this issue. Thermo-mechanical models demonstrate that 1D transport cannot adjust both basin geometry and Apatite Fission Track exhumation ages. When out-of-plane sediment transfer is considered, the amount of evacuated sediment delays or accelerates the formation of new faults, affecting the relative timing of exhumation. For our case study, lateral drainage must evacuate 80% of the sediments to match the geological constraints, which is consistent with other source to sink analyses. This indicates that lateral drainage should not be neglected in regional 2D models.

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“…Activation of the South Tian Shan foreland thrust belt west of the Talas-Fergana fault is poorly constrained. The conglomerate deposits became prevalent along the foreland since the Pliocene (Yang et al, 2014(Yang et al, , 2015Chen et al, 2015). At the foreland area east of the Talas-Fergana fault, uplift of the hinterland structure began at ca.…”

Section: Late Cenozoic Tectonics In the Convergence Areamentioning

confidence: 99%

“…In this study, the age framework of the Wuheshalu section is based on correlation with nearby late Cenozoic magnetostratigraphically dated sections. Recently, several magnetostratigraphic works had been carried out in the study area (Chen et al, 2002(Chen et al, , 2015Heermance et al, 2007;Tang et al, 2015;Thompson et al, 2015;Yang et al, 2015;Qiao et al, 2016Qiao et al, , 2017Liu et al, 2017;Thompson Jobe et al, 2018). However, due to the lack of fossils and synchronous volcanic deposits, variable thickness and lithofacies, and poor preservation, the late Cenozoic chronostratigraphic framework throughout the Pamir-South Tian Shan convergence area and the western Kashi Basin still remains in dispute.…”

Section: Age Correlationmentioning

confidence: 99%

Convergence of the Pamir and the South Tian Shan in the late Cenozoic: Insights from provenance analysis in the Wuheshalu section at the convergence area

Chen

Sobel

et al. 2019

Lithosphere

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In response to collision and convergence between India and Asia during the Cenozoic, convergence took place between the Pamir and South Tian Shan. Here we present new detrital zircon U-Pb ages coupled with conglomerate clast counting and sedimentary data from the late Cenozoic Wuheshalu section in the convergence zone, to shed light on the convergence process of the Pamir and South Tian Shan. Large Triassic zircon U-Pb age populations in all seven samples suggest that Triassic igneous rocks from the North Pamir were the major source area for the late Cenozoic Wuheshalu section. In the Miocene, large populations of the North Pamir component supports rapid exhumation in the North Pamir and suggest that topography already existed there since the early Miocene. Exhumation of the South Tian Shan was relatively less important in the Miocene and its detritus could only reach a limited area in the foreland area. Gradually increasing sediment loading and convergence of the Pamir and South Tian Shan caused rapid subsidence in the convergence area. Since ca. 6–5.3 Ma, the combination of a major North Pamir component and a minor South Tian Shan component at the Wuheshalu section is consistent with active deformation of the South Tian Shan and the North Pamir. During deposition of the upper Atushi Formation, a larger proportion of North Pamir–derived sediments was deposited in the Wuheshalu section, maybe because faulting and northward propagation of the North Pamir caused northward displacement of the depocenter to north of the Wuheshalu section.

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Sedimentology and magnetostratigraphy of the Tierekesazi Cenozoic section in the foreland region of south West Tian Shan in Western China

Cited by 23 publications

References 96 publications

Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

Impact of range‐parallel sediment transport on 2D thermo‐mechanical models of mountain belts: Application to the Kyrgyz Tien Shan

Convergence of the Pamir and the South Tian Shan in the late Cenozoic: Insights from provenance analysis in the Wuheshalu section at the convergence area

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