Mengjun LI, Naishang BI, Lisha HU, Xiaohang LIU, Jingping XU. 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: Mengjun LI, Naishang BI, Lisha HU, Xiaohang LIU, Jingping XU. 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

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

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  • Received Date: December 13, 2018
  • Revised Date: March 18, 2019
  • 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 140th 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.
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