Sedimentary characteristics and processes revealed by the push cores of the 140<sup>th</sup> dive of DSV "Jiaolong" in the Taiwan Submarine Canyon, Northern South China Sea

LI Mengjun; BI Naishang; HU Lisha; LIU Xiaohang; XU Jingping

doi:10.16562/j.cnki.0256-1492.2018121401

2019 Vol. 39, No. 4

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Article navigation > Marine Geology & Quaternary Geology > 2019 > 39(4): 23-33

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LI Mengjun, BI Naishang, HU Lisha, LIU Xiaohang, XU Jingping. Sedimentary characteristics and processes revealed by the push cores of the 140th dive of DSV 'Jiaolong' in the Taiwan Submarine Canyon, Northern South China Sea[J]. Marine Geology & Quaternary Geology, 2019, 39(4): 23-33. doi: 10.16562/j.cnki.0256-1492.2018121401

Citation:

LI Mengjun, BI Naishang, HU Lisha, LIU Xiaohang, XU Jingping. Sedimentary characteristics and processes revealed by the push cores of the 140^th dive of DSV "Jiaolong" in the Taiwan Submarine Canyon, Northern South China Sea[J]. Marine Geology & Quaternary Geology, 2019, 39(4): 23-33. doi: 10.16562/j.cnki.0256-1492.2018121401

Sedimentary characteristics and processes revealed by the push cores of the 140^th dive of DSV "Jiaolong" in the Taiwan Submarine Canyon, Northern South China Sea

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Submarine Geosciences and Prospecting Technology, Ministry of Education, China, Qingdao 266100, China
3.
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
4.
Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

More Information

Corresponding author: XU Jingping, xujp@sustc.edu.cn

Received Date: 14 December 2018

Revised Date: 19 March 2019

Publish Date: 28 August 2019

Abstract

Abstract

Transportation and deposition of sediments in submarine canyons are critical for understanding the deep-sea processes and environments, particularly the turbidity currents. In this paper, three push cores, collected from three sites in the middle reaches of the Taiwan Submarine Canyon during the 140^th dive of Chinese DSV (Deep Submersible Vehicle) "Jiao Long", are analyzed for sediment characteristics, sources, and depositional processes. The upper parts of the push cores are dominated by homogeneous fine-grained sediments signified by a typical hemipelagic-pelagic benthic foraminifera assemblage. In contrast, the lower parts consist of coarse-grained sediments and assemblages of "shallow-water" benthic foraminifera typically occur in coastal or shelf areas. Their depositional characteristics suggest a down-slope transportation most likely by turbidity currents along the canyon. AMS¹⁴C dating indicates that the turbidite was formed approximately 150 cal.aBP, and the clay mineral compositions suggests a kind of hemipelagic-pelagic and the turbidite deposits with sediment sources dominantly from the Taiwan island and partly from the Pearl River and Luzon Island.
- sedimentary processes /
- turbidity currents /
- DSV "Jiaolong" /
- Taiwan submarine canyon /
- South China Sea

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References

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