中南-礼乐断裂带在南海海盆北部的时空展布与深部结构

徐子英; 汪俊; 姚永坚; 唐江浪; 高红芳; 李学杰

doi:10.3799/dqkx.2020.400

Volume 46 Issue 3

Mar. 2021

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Article Navigation > Earth Science > 2021 > 46(3): 942-955

Xu Ziying, Wang Jun, Yao Yongjian, Tang Jianglang, Gao Hongfang, Li Xuejie, 2021. The Temporal-Spatial Distribution and Deep Structure of the Zhongnan- Liyue Fault Zone in the North of the South China Sea Basin. Earth Science, 46(3): 942-955. doi: 10.3799/dqkx.2020.400

Citation:

Xu Ziying, Wang Jun, Yao Yongjian, Tang Jianglang, Gao Hongfang, Li Xuejie, 2021. The Temporal-Spatial Distribution and Deep Structure of the Zhongnan- Liyue Fault Zone in the North of the South China Sea Basin. Earth Science, 46(3): 942-955. doi: 10.3799/dqkx.2020.400

Citation:

Xu Ziying, Wang Jun, Yao Yongjian, Tang Jianglang, Gao Hongfang, Li Xuejie, 2021. The Temporal-Spatial Distribution and Deep Structure of the Zhongnan- Liyue Fault Zone in the North of the South China Sea Basin. Earth Science, 46(3): 942-955. doi: 10.3799/dqkx.2020.400

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The Temporal-Spatial Distribution and Deep Structure of the Zhongnan- Liyue Fault Zone in the North of the South China Sea Basin

doi: 10.3799/dqkx.2020.400

Xu Ziying^{1, 2
,
,},
Wang Jun^{1, 2},
Yao Yongjian^{1, 2
,
,},
Tang Jianglang¹,
Gao Hongfang^{1, 2},
Li Xuejie^{1, 2}

1.
Key Laboratory of Marine Mineral Resources, MNR, Guangzhou Marine Geological Survey, Guangzhou 510075, China
2.
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China

Received Date: 2020-11-03
Publish Date: 2021-03-15

Abstract

Abstract

The Zhongnan-Liyue fault zone (ZLFZ) is an important fault zone that coordinated the spread of the sub-oceanic basins in the South China Sea (SCS). In-depth study of the temporal-spatial distribution and deep structures of the ZLFZ is of great significance for understanding the multi-phase spread and tectonic evolution of the SCS Basin. Based on the geological and geophysical data including multi-channel seismic, gravity, magnetic and topographic data, this study reveals the temporal-spatial distribution, internal structural deformation and deep structures about the north segment of ZLFZ in SCS basin. The results show that (1) the width of the ZLFZ between the northwest sub-basin and the eastern sub-basin is about 25-35 km. It starts from the west side of the Zhujiang Sea valley (18.7°N, 115.5°E) and disappears at the northeast of Zhongsha bank (17.2°N, 116.0°E), and is mainly distributed in the NNW direction. The main fault of the ZLFZ is distributed along the seamounts ridge and intrusive body. The faults are mainly developed in the early stage, which are normal faults. (2) The ZLFZ was mainly developed in Oligocene to Early-Miocene and Mid-Miocene to Late-Miocene, the development was mainly inherited. (3) In the deep structures, there are not only different burial depths of the Moho on the west and east sides of the ZLFZ, but also different sedimentary thickness and oceanic crust thickness in the northwest sub-basin and eastern sub-basin. It is speculated that the ZLFZ is at least a crustal-level fault, which may even break through the lithosphere.
- South China Sea basin,
- Zhongnan-Liyue fault zone,
- temporal-spatial distribution,
- tectonic deformation,
- deep structure,
- marine geology

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The Temporal-Spatial Distribution and Deep Structure of the Zhongnan- Liyue Fault Zone in the North of the South China Sea Basin

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