Sedimentary architecture of mass transport deposits and its influence on later turbidity deposition—An example from the L area of Lingshui Sag in Qiongdongnan Basin

GAO Yifan; LI Lei; CHENG Linyan; GONG Guangchuan; ZHANG Wei; YANG Zhipeng; WANG Pan; YANG Lei

doi:10.16562/j.cnki.0256-1492.2021061501

2022 Vol. 42, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2022 > 42(2): 101-109

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GAO Yifan, LI Lei, CHENG Linyan, GONG Guangchuan, ZHANG Wei, YANG Zhipeng, WANG Pan, YANG Lei. Sedimentary architecture of mass transport deposits and its influence on later turbidity deposition—An example from the L area of Lingshui Sag in Qiongdongnan Basin[J]. Marine Geology & Quaternary Geology, 2022, 42(2): 101-109. doi: 10.16562/j.cnki.0256-1492.2021061501

Citation:

GAO Yifan, LI Lei, CHENG Linyan, GONG Guangchuan, ZHANG Wei, YANG Zhipeng, WANG Pan, YANG Lei. Sedimentary architecture of mass transport deposits and its influence on later turbidity deposition—An example from the L area of Lingshui Sag in Qiongdongnan Basin[J]. Marine Geology & Quaternary Geology, 2022, 42(2): 101-109. doi: 10.16562/j.cnki.0256-1492.2021061501

Sedimentary architecture of mass transport deposits and its influence on later turbidity deposition—An example from the L area of Lingshui Sag in Qiongdongnan Basin

1.
School of Earth Sciences and Engineering Xi’an Shiyou University, Xi’an 710065, China
2.
Shaanxi Key Lab of Petroleum Accumulation Geology, Xi’an 710065, China
3.
Exploration and Development Research Institute of Huawei Oilfield Company, PetroChina, Renqiu 062550, China

More Information

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

Received Date: 15 June 2021

Revised Date: 19 September 2021

Accepted Date: 19 September 2021

Publish Date: 28 April 2022

Abstract

Abstract

Through the fine interpretation of high-resolution 3D seismic data collected from the slope area of the Lingshui Sag in the Qiongdongnan Basin, extensively developed mass transport deposits (MTDs) have been discovered with the characteristics as follows: (1) The mass transport deposits usually show weak amplitude, low continuity, chaotic or blank seismic reflection with obvious erosion; (2) A large number of internal structures such as erosional scratches, thrust nappe structures, and squeezed ridges are observed in the body and toe parts of the deposits; (3) Mass transport induced thrust nappe structures caused by internal structural deformation are common and the surface morphology of the deformation is always characterized by continuous protrusions and depressions. Two stages of MTDs, i.e. MTDs1 and MTDs2, are found in the study area together with associated turbidites. The ridges 10~15 km long and 2~3 km wide formed by the MTDs1may change the morphology of seafloor, block the way of later turbidity currents and change the location of turbidites.
- erosional scratches /
- thrust nappe structure /
- undulating top surface /
- later turbidity deposits /
- Qiongdongnan Basin

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References

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