CHARACTERISTICS AND DEPOSITIONAL MODEL OF THE FAULT-CONTROLLED BOTTOM-CURRENT DRIFT DEPOSITS IN THEBEIKANG BASIN, SOUTHERN SOUTH CHINA SEA

LEI Zhenyu; ZHANG Li; LIU Shan; SU Ming; LUO Shuaibing; SHUAI Qingwei

doi:10.16028/j.1009-2722.2021.028

2021 Vol. 37, No. 4

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Article navigation > Marine Geology Frontiers > 2021 > 37(4): 46-52

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LEI Zhenyu, ZHANG Li, LIU Shan, SU Ming, LUO Shuaibing, SHUAI Qingwei. CHARACTERISTICS AND DEPOSITIONAL MODEL OF THE FAULT-CONTROLLED BOTTOM-CURRENT DRIFT DEPOSITS IN THEBEIKANG BASIN, SOUTHERN SOUTH CHINA SEA[J]. Marine Geology Frontiers, 2021, 37(4): 46-52. doi: 10.16028/j.1009-2722.2021.028

Citation:

LEI Zhenyu, ZHANG Li, LIU Shan, SU Ming, LUO Shuaibing, SHUAI Qingwei. CHARACTERISTICS AND DEPOSITIONAL MODEL OF THE FAULT-CONTROLLED BOTTOM-CURRENT DRIFT DEPOSITS IN THEBEIKANG BASIN, SOUTHERN SOUTH CHINA SEA[J]. Marine Geology Frontiers, 2021, 37(4): 46-52. doi: 10.16028/j.1009-2722.2021.028

CHARACTERISTICS AND DEPOSITIONAL MODEL OF THE FAULT-CONTROLLED BOTTOM-CURRENT DRIFT DEPOSITS IN THEBEIKANG BASIN, SOUTHERN SOUTH CHINA SEA

1.
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510710, China
2.
Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou 510760, China
3.
School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
4.
Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering（Zhuhai）, 510006, China

More Information

Corresponding author: LIU Shan, liush296@mail.sysu.edu.cn

Received Date: 03 February 2021

Publish Date: 28 April 2021

Abstract

Abstract

Bottom current is a significant depositional process in deep sea, by which sediments can be directly transported to form contourite drifts on seafloor. Among the different types of contourite drifts, fault-controlled drifts are not well constrained and few studies have been devoted to their morphological features and depositional patterns. This study is to summarize the features for seismic identification of fault-controlled drifts based on high-resolution multibeam bathymetric and seismic data from the Beikang Basin, southern South China Sea. Two sub-types of fault-controlled drifts, i.e. the syn-depositional and post-depositional fault-controlled drifts are recognized. Their formation mechanism and relationships with faulting are discussed in this paper. According to the interaction between faulting and bottom-current processes the bottom currents can be divided into two types: 1) bottom currents simultaneous to the fault movement, generating the synchronous fault-controlled drifts; 2) bottom currents after the fault movement generating the post-depositional drifts. However, the researches conducted so far are limited to the drift deposits related to normal faults. More researches are required for the drifts formed in other active tectonic settings, such as those related to strike-slip faults and reverse faults.
- normal fault /
- bottom current /
- contourite drift /
- sedimentary depositional pattern /
- Beikang Basin /
- South China Sea

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References

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