Turbidity deposits and their provenance: evidence from core SH37 in Shenhu area of the South China Sea

XIAO Qianwen; FENG Xiuli; MIAO Xiaoming

doi:10.16562/j.cnki.0256-1492.2021011901

2021 Vol. 41, No. 5

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Article navigation > Marine Geology & Quaternary Geology > 2021 > 41(5): 101-111

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XIAO Qianwen, FENG Xiuli, MIAO Xiaoming. Turbidity deposits and their provenance: evidence from core SH37 in Shenhu area of the South China Sea[J]. Marine Geology & Quaternary Geology, 2021, 41(5): 101-111. doi: 10.16562/j.cnki.0256-1492.2021011901

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XIAO Qianwen, FENG Xiuli, MIAO Xiaoming. Turbidity deposits and their provenance: evidence from core SH37 in Shenhu area of the South China Sea[J]. Marine Geology & Quaternary Geology, 2021, 41(5): 101-111. doi: 10.16562/j.cnki.0256-1492.2021011901

Turbidity deposits and their provenance: evidence from core SH37 in Shenhu area of the South China Sea

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Submarine Geosciences and Prospecting, Qingdao 266100, China

More Information

Corresponding author: FENG Xiuli, fengxiuli@ouc.edu.cn

Received Date: 19 January 2021

Revised Date: 02 March 2021

Publish Date: 28 October 2021

Abstract

Abstract

In order to seek for the origin of the turbidite deposits in the Shenhu area of the northern South China Sea, grain size analysis, AMS¹⁴C dating and element geochemical analysis have been carried out for the core of SH37. Grain size distribution and C-M pattern suggest that the core deposits between the interval of 200～300 cm belong to turbidite deposits. The interval is composed of relatively coarse sediments with bad sorting, as EM3 and the ratio of Zr/Rb are rather high. A phenomenon of age reversal is observed. It is speculated that the turbidity current is probably triggered by sea level change or gravity. Rare earth elements and scatter plots of (La/Sm)_UCC-(Gd/Yb)_UCC and (Gd/Yb)_UCC-(Gd/Lu)_UCC suggest that the turbidite sediments are mainly sourced from the Pearl River system and the rivers on the Taiwan Island.
- turbidity deposit /
- strata inversion /
- landslide /
- provenance /
- Shenhu area

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References

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