南海北部珠江口外峡谷体系沉积特征、演化及其控制因素

杜文波; 聂鑫; 杨楚鹏; 胡小三; 高红芳

doi:10.3799/dqkx.2022.166

Volume 47 Issue 11

Nov. 2022

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Du Wenbo, Nie Xin, Yang Chupeng, Hu Xiaosan, Gao Hongfang, 2022. Sedimentary Characteristics, Evolution and Controlling Factors of the Pearl River Canyon System in the Northern South China Sea. Earth Science, 47(11): 4046-4059. doi: 10.3799/dqkx.2022.166

Citation:

Du Wenbo, Nie Xin, Yang Chupeng, Hu Xiaosan, Gao Hongfang, 2022. Sedimentary Characteristics, Evolution and Controlling Factors of the Pearl River Canyon System in the Northern South China Sea. Earth Science, 47(11): 4046-4059. doi: 10.3799/dqkx.2022.166

Citation:

Du Wenbo, Nie Xin, Yang Chupeng, Hu Xiaosan, Gao Hongfang, 2022. Sedimentary Characteristics, Evolution and Controlling Factors of the Pearl River Canyon System in the Northern South China Sea. Earth Science, 47(11): 4046-4059. doi: 10.3799/dqkx.2022.166

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Sedimentary Characteristics, Evolution and Controlling Factors of the Pearl River Canyon System in the Northern South China Sea

doi: 10.3799/dqkx.2022.166

Du Wenbo^{1, 2
,
,},
Nie Xin^{1, 2
,
,},
Yang Chupeng^{1, 2},
Hu Xiaosan^{1, 2},
Gao Hongfang^{1, 2}

1.
China Geological Survey, Guangzhou Marine Geological Survey, Ministry of Natural Resources, Key Laboratory of Marine Mineral Resources, Guangzhou 511458, China
2.
Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China

Received Date: 2022-02-16
Publish Date: 2022-11-25

Abstract

Abstract

The coarser clastic sediment in deep-water submarine canyons is a hot topic in the field of marine geology, not only because it can be good oil and gas reservoirs, but also because it records the complete information of marine geological environment change. In order to reveal the sedimentary evolution process and controlling factors of the Pearl River Canyon system, in this paper it combined multibeam bathymetric and high resolution 2D multi-channel seismic data to study the topography characteristics, sedimentary filling characteristics, the formation processes and controlling factors of the Pearl River Canyon system. The study shows that Pearl River Canyon system has developed in three sections. The upper section is in NW-SE trend, with a width of more than 30 km, low erosion intensity, and irregular cross section. The middle section is in E-W trend, with narrower width (25-30 km), and U-shaped cross section. The lower sections is in NW-SE trend with the largest width (25-45 km) and U-shaped cross section. The middle and the lower sections are dominated by sedimentation. The evolution of Pearl River Canyon system could be divided into three stages: the early stage (23-15.5 Ma), the channel-submarine fan form stage (15.5-11.6 Ma) and the canyon-submarine fan/block flow stage (11.6-0 Ma). It's revealed that the development and evolution of the Pearl River Canyon system are mainly controlled by tectonic movement, sea level change and sediment supply. The above analysis has practical significance for the study of marine disaster, deep-water depositional system and hydrocarbon resources exploration in the northern South China Sea.
- Pearl River Canyon system,
- sedimentary evolution,
- controlling factor,
- tectonic activity,
- evolution stage,
- sedimentology

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References(46)

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Sedimentary Characteristics, Evolution and Controlling Factors of the Pearl River Canyon System in the Northern South China Sea

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