Numerical simulation of post-mass transport deposition: a case study of the margin slope of South China Sea

GONG Guangchuan; LI Lei; HE Wang; ZHANG Wei; GAO Yifan; CHENG Linyan; YANG Zhipeng

doi:10.16028/j.1009-2722.2021.330

2022 Vol. 38, No. 12

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Article navigation > Marine Geology Frontiers > 2022 > 38(12): 75-83

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GONG Guangchuan, LI Lei, HE Wang, ZHANG Wei, GAO Yifan, CHENG Linyan, YANG Zhipeng. Numerical simulation of post-mass transport deposition: a case study of the margin slope of South China Sea[J]. Marine Geology Frontiers, 2022, 38(12): 75-83. doi: 10.16028/j.1009-2722.2021.330

Citation:

GONG Guangchuan, LI Lei, HE Wang, ZHANG Wei, GAO Yifan, CHENG Linyan, YANG Zhipeng. Numerical simulation of post-mass transport deposition: a case study of the margin slope of South China Sea[J]. Marine Geology Frontiers, 2022, 38(12): 75-83. doi: 10.16028/j.1009-2722.2021.330

Numerical simulation of post-mass transport deposition: a case study of the margin slope of South China Sea

1.
School of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an 710065, China
2.
Shaanxi Key Laboratory of Oil and Gas Accumulation Geology, Xi'an 710065, China
3.
Northwest Oilfield Branch of SINOPEC, Urumqi 830011, China
4.
Exploration and Development Technology Research Center, Yanchang Oilfield Co. Ltd., Yan'an 716000, China

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Corresponding author: LI Lei, lilei@xsyu.edu.cn

Received Date: 29 December 2021

Publish Date: 28 December 2022

Abstract

Abstract

The mass transport deposits (MTDs) have largely-undulating top surface, which would affect post-MTD turbidity currents deposition and distribution. A systematic study on the MTD deposition is helpful for interpreting the deposit pattern of submarine fan. Based on 3D seismic data in the Qiongying continental slope of the northern South China Sea, the MTD sedimentary system, and its overburden deposits, and the impact of the top surface on post-MTD sedimentation were numerically simulated using the Flow3D. Results show that: ① the top surface of translational domain is flat and gentle, on which distributed broad-gentle troughs; and the top surface of the toe domain fluctuates greatly, forming an isolated troughs. ② On the top surface of the translational domain forms a large and continuous submarine fan, while a small submarine fan can form in the toe domain; the slip slope of local uplift can develop different-sized submarine fans. The terminal domain is a favorable area for large submarine fans formation. ③ The greater relief of the top surface, the more conducive to sediment unloading and deposit, and the larger submarine fan formation.
- turbidity currents deposition /
- mass transport deposition /
- submarine fan /
- numerical simulation

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References

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