Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen

Zhang, Zhiliang; Sun, Jimin

doi:10.1007/s00531-020-01880-2

Cited by 12 publications

(7 citation statements)

References 105 publications

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“…The Western arcuate Variscan belt has been compared to the Pamir West Himalayan syntax (Matte, 1986, 1991). Since oroclinal bending appears to occur in a very different way as the Indian Craton indenter have no equivalent in the weak late‐Variscan domain squeezed between the Laurussia and Gondwana cratonic land‐masses (Figure 13), these two belts are indeed characterized by (i) development of crustal‐scale strike‐slip shear zones on the two branches of a nascent syntax (e.g., Martínez Catalán, 2011; Zhang & Sun, 2020), (ii) strain partitioning processes leading to the exhumation of the deep crustal rock within extensional gneiss domes and syn‐convergence lateral and transverse escape of the weak mid‐lower crust (Gapais et al., 1992, 2015; Martínez Catalán et al., 2014; Rutte et al., 2017; Stephenson et al., 2001), and (iii) accommodation of deformation over large distances (i.e., more than 600‐km wide orogenic belts) in a hot and weak orogenic lithosphere bounded by strong and colder cratonic lithospheres (Figure 13).…”

Section: Discussionmentioning

confidence: 99%

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

et al. 2021

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The Variscan crust of Pyrenees documents vertical strain partitioning: lateral flow vs uppercrust thickening in the core of Pangea -We document horizontal strain partitioning between extensional and compressional domains during plate-scale oroclinal bending Accepted ArticleThis article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

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Section: Discussionmentioning

confidence: 99%

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

et al. 2021

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“…KYTS: Kashgar-Yecheng transfer system, MPT: Main Pamir Thrust, QFTS: Qimugen fold-thrust system, TKT: Tam Karaul fault, WKFT: West Kunlun frontal thrust, and WKFR: West Kunlun frontal blind ramp. Tectonics 10.1029/2023TC008233 rotations, such as limited rotations during the Cenozoic (Chen et al, 1992;Gilder et al, 1996;Li et al, 2013;Rumelhart et al, 1999) or systematic regional clockwise rotations (∼15-20°) during the Oligocene (Bosboom et al, 2014;Zhang & Sun, 2020) or after ∼15 Ma (Blayney et al, 2019) (Figure 1a). These inconsistent rotations were mostly related to the northward indentation of the Pamir salient during the Cenozoic.…”

Section: 1029/2023tc008233mentioning

confidence: 99%

“…Paleomagnetism is also essential for providing independent constraints and can be used to quantify and date the VARs of the upper crust along the FTBs (Figure 1a) (Bazhenov et al., 1994; Bosboom et al., 2014; Chen et al., 1991; Li et al., 2018; Rumelhart et al., 1999; Tong et al., 2020; Xu et al., 2024; Zhang et al., 2019). Many paleomagnetic studies have been conducted along the West Kunlun Mountains, most of them were distributed in the northwestern or eastern part of the Pamir salient, with large discrepancies in both the pattern and magnitude of rotations, such as limited rotations during the Cenozoic (Chen et al., 1992; Gilder et al., 1996; Li et al., 2013; Rumelhart et al., 1999) or systematic regional clockwise rotations (∼15–20°) during the Oligocene (Bosboom et al., 2014; Zhang & Sun, 2020) or after ∼15 Ma (Blayney et al., 2019) (Figure 1a). These inconsistent rotations were mostly related to the northward indentation of the Pamir salient during the Cenozoic.…”

Section: Introductionmentioning

confidence: 99%

Late Miocene Oroclinal Bending of the Mazatagh Thrust Belt in the Central Tarim Basin and Its Tectonic Implications

Li,

Yan,

Peng

et al. 2024

Tectonics

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The arcuate Mazatagh thrust belt (MTB) in the central Tarim Basin is one of the key regions for understanding the Cenozoic intracontinental deformation in response to the India–Eurasia collision. However, whether it was formed due to oroclinal bending and its kinematic processes remain unclear. Here, we present a detailed paleomagnetic rotation study at Hongbaishan in the middle MTB to shed new light on the deformation in this region. Positive fold and reversal tests of 50 site means suggest primary magnetizations. The paleomagnetic declinations indicate ∼14.6 ± 8.5° absolute clockwise rotation at Hongbaishan since the late Miocene (∼7.6 Ma). Together with the rotation results calculated from Hongbaishan‐1 and Mazatagh magnetostratigraphic data sets in the southeastern MTB, these results reveal an increasing magnitude of clockwise rotation along the belt toward its southeastern tip. Positive oroclinal tests along the MTB suggest the occurrence of oroclinal bending that curved the originally straight MTB before and during the deposition of its lower part, and nearly half of the bending had occurred during the deposition of its upper part. This oroclinal bending is mostly attributed to the northward indentation of the West Kunlun Mountains along the décollement salt‒gypsum layers and further implies ∼7.9° absolute clockwise rotation of the Tarim Basin since the late Miocene. Integrating these findings with other lines of geological evidence around the Tarim Basin, we propose that episodic widespread tectonic deformation with basinward propagation occurred since the late Miocene due to the far‐field effect of the continuous northward indentation of the Indian Plate into Eurasia.

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“…0°) (Bazhenov et al, 1994; Pozzi & Feinberg, 1991; Thomas et al, 1994). The timing of the rotation, however, remains controversial due to poor age constraints in the basin (Bosboom et al, 2014; Thomas et al, 1994; Zhang & Sun, 2020).…”

Section: Geological Backgroundmentioning

confidence: 99%

Mesozoic–Cenozoic multistage tectonic evolution of the Pamir: Detrital fission‐track constraints from the Tajik Basin

Najman

Dupont‐Nivet

et al. 2022

Basin Research

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Knowledge of the tectonic history of the Pamir contributes to our understanding of both the evolution of collisional orogenic belts as well as factors controlling Central Asian aridification. It is, however, not easy to decipher the Mesozoic-Cenozoic tectonics of the Pamir due to extensive Neogene deformation in an orogen that remains largely understudied. This study reports detrital apatite and zircon fission-track (FT) ages from both the eastern Tajik Basin sedimentary rocks and Pamir modern river sands. These FT data, supported by vitrinite reflectance and zircon and apatite U-Pb double dating, suggest that the majority of the FT ages are unreset and record exhumation stages of the Pamir, which has served as the source terrane of the Tajik Basin since the Cretaceous. Furthermore, we combine the new data with a compilation of published detrital apatite and zircon FT data from both the Tajik Basin sedimentary rocks and Pamir modern river sands, to explore the Mesozoic-Cenozoic tectonic history of Pamir. Deconvolved FT Peak Ages document two major Mesozoic exhumation events associated with the Late Triassic-Early Jurassic Cimmerian orogeny that reflects accretion of the Pamir terranes, as well as the Early-early Late Cretaceous deformation associated with the northward subduction of the Neo-Tethys Ocean beneath Pamir.The compiled data also show significant Late Eocene-Neogene exhumation associated with the ongoing formation of the Pamir, which peaks at ca. 36, 25, 14 and 7 Ma.

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Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen

Cited by 12 publications

References 105 publications

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

Late Miocene Oroclinal Bending of the Mazatagh Thrust Belt in the Central Tarim Basin and Its Tectonic Implications

Mesozoic–Cenozoic multistage tectonic evolution of the Pamir: Detrital fission‐track constraints from the Tajik Basin

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