阿尔金造山带中-新元古代沉积地层构造变形特征及其指示意义

郝江波; 李宇科; 王超; 冀文斌; 乔元栋; 喻遵谱; 孙晓奎; 张帅

doi:10.3799/dqkx.2025.158

Volume 50 Issue 9

Sep. 2025

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Article Navigation > Earth Science > 2025 > 50(9): 3679-3690

Hao Jiangbo, Li Yuke, Wang Chao, Ji Wenbin, Qiao Yuandong, Yu Zunpu, Sun Xiaokui, Zhang Shuai, 2025. Structural Deformation Characteristics and Its Implications of Meso- to Neoproterozoic Sedimentary Strata in the Altyn Tagh Orogenic Belt. Earth Science, 50(9): 3679-3690. doi: 10.3799/dqkx.2025.158

Citation:

Hao Jiangbo, Li Yuke, Wang Chao, Ji Wenbin, Qiao Yuandong, Yu Zunpu, Sun Xiaokui, Zhang Shuai, 2025. Structural Deformation Characteristics and Its Implications of Meso- to Neoproterozoic Sedimentary Strata in the Altyn Tagh Orogenic Belt. Earth Science, 50(9): 3679-3690. doi: 10.3799/dqkx.2025.158

Citation:

Hao Jiangbo, Li Yuke, Wang Chao, Ji Wenbin, Qiao Yuandong, Yu Zunpu, Sun Xiaokui, Zhang Shuai, 2025. Structural Deformation Characteristics and Its Implications of Meso- to Neoproterozoic Sedimentary Strata in the Altyn Tagh Orogenic Belt. Earth Science, 50(9): 3679-3690. doi: 10.3799/dqkx.2025.158

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Structural Deformation Characteristics and Its Implications of Meso- to Neoproterozoic Sedimentary Strata in the Altyn Tagh Orogenic Belt

doi: 10.3799/dqkx.2025.158

1.
College of Architecture and Geomatics Engineering, Shanxi Datong University, Datong 037003, China
2.
Department of Geology, Northwest University, Xi'an 710069, China
3.
Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China

Received Date: 2025-05-03
Publish Date: 2025-09-25

Abstract

Abstract

To elucidate the Meso-Neoproterozoic tectonic evolution associated with the amalgamation and breakup of the Rodinia supercontinent in the Altyn Tagh Orogenic Belt, the field geological mapping is conducted and the structural analysis is carried out on the Taxidaban Group (1 080-950 Ma) and Suoerkuli Group (~930 Ma) in the region. The results show that the Taxidaban Group comprises low greenschist-facies para-metamorphic rocks subjected to three phases of deformation: (1) The D1 phase is characterized by pervasive schistosity S₁ transposing primary bedding S₀; (2) the D2 phase developed WNW-ESE trending folds and crenulation cleavage S₂ under NNE-SSW compression; (3) the D3 phase presents as NW-SE directed thrust faults and upright folds induced by SE-NW compression. The Suoerkuli Group unconformably overlies the Taxidaban Group, exhibiting distinct discontinuities in depositional environments and structural deformation between the two units. Integrating lithological compositions, deformation sequences, and spatiotemporal distribution of early Neoproterozoic magmatic rocks with their tectonic settings, this study proposes that the Altyn region completed a tectonic transition from an active continental margin to post-collisional extension during the late Mesoproterozoic to early Neoproterozoic. The findings provide critical evidence for constraining its relationship with Rodinia supercontinent cycles and paleogeographic affinity.
- The Altyn Tagh Orogenic Belt,
- Meso-to Neoproterozoic,
- tectonic deformation,
- tectonic evolution,
- sedimentology,
- petrology

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Structural Deformation Characteristics and Its Implications of Meso- to Neoproterozoic Sedimentary Strata in the Altyn Tagh Orogenic Belt

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