塔里木盆地顺南地区18号走滑断裂带的构造几何学特征及成因机制

毛丹凤; 何登发; 陈槚俊; 田方磊

doi:10.3799/dqkx.2023.065

Volume 48 Issue 6

Jun. 2023

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Article Navigation > Earth Science > 2023 > 48(6): 2151-2167

Mao Danfeng, He Dengfa, Chen Jiajun, Tian Fanglei, 2023. Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China. Earth Science, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065

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Mao Danfeng, He Dengfa, Chen Jiajun, Tian Fanglei, 2023. Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China. Earth Science, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065

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Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China

doi: 10.3799/dqkx.2023.065

School of Energy Resources, China University of Geosciences, Beijing 100083, China

Received Date: 2022-07-24
Publish Date: 2023-06-25

Abstract

Abstract

In order to deepen the understanding of geometric characteristics and genetic mechanism of strike-slip faults with small displacement in Tarim basin, the characteristics of the No. 18 strike-slip faults in Shunnan area in detail were studied. Using the latest 3D seismic data and well data, it discusses its genetic mechanism. The aspect ratio of the faults is about 1∶10, and the faults are the longest in the middle in vertical direction; the faults have features such as duplex structures, horsetail fans, left and right echelons on the map, and such as flower structural styles and graben on seismic profiles; the fault properties and throw are different, and the linkage of faults is soft-link, followed by hard-link; the segmentation characteristics of the faults in different structural layers have inheritance and difference, and there are great differences in the combination of longitudinal structural styles in different positions on the map. Affected by early faults, the deformability of different strata and the different strike-slip activities in different periods, the faults had preliminary formed in the late of the Early Cambrian. The faults experienced successively right and left-lateral strike-slip activities in the Late Ordovician, and the activities were the strongest on the middle of map and the flower structure was formed where the strata physics changes frequently in the Upper Ordovician; respectively the horsetail in the southern and strike-slip double structure in the northern were gradually formed during this period. The northern faults experienced intense left-lateral strike-slip activity between the Late Silurian and the Early Carboniferous, and it promoted the lateral hard-link of faults. The middle faults experienced weak right-lateral strike-slip activity during the Late Carboniferous, and it promoted the formation of flower structures. The echelons were formed in the clastic rock with poweless deformability.
- strike-slip fault,
- Shunnan area,
- flower structure,
- echelon,
- rock deformability,
- lateral hard-link of faults,
- tectonics

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References(37)

References

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Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China

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