Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (5): 89-104.doi: 10.11978/2021176CSTR: 32234.14.2021176

• Marine Geology • Previous Articles     Next Articles

Formation and evolution of Yongle Submarine canyon in the Xisha Sea area, South China Sea*

CHEN Liang1(), LIU Shiqiao1, XIN Zhuo1, XING Zihao1(), ZHANG Jingwei1, LIU Liang1, JIN Jiapeng2, LI wei3, CHEN Wanli4   

  1. 1. Haikou Center of Marine Geological Survey, China Geological Survey, Haikou 571127, China
    2. Pilot National Laboratory for Marine Science and Technology (Qingdao) Function Laboratory of Marine Geo-Resource Evaluation and Exploration, Qingdao 266071, China
    3. Key Laboratory of Marginal Sea and Ocean Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    4. Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China
  • Received:2021-12-14 Revised:2022-03-08 Online:2022-09-10 Published:2022-03-21
  • Contact: XING Zihao E-mail:clcugb@163.com;starzhow@163.com
  • Supported by:
    Geological Survey Project of China Geological Survey(DD20191027);Geological Survey Project of China Geological Survey(ZD20220606);Key Laboratory of Ocean and Marginal Sea Geology, Chinese Academy of Sciences(OMG202010)

Abstract:

Carbonate canyons are developed around isolated carbonate platforms in offshore environment. The study of these canyons is helpful to understand the “source-to-sink” system of carbonate clastic sediments and deep water hydrocarbon accumulation. Based on the data of multi-beam bathymetric, high-resolution 2D multi-channel seismic profiles, we depicted the geomorphic features and internal filling characteristics of the Yongle Submarine Canyon in the Xisha area, South China Sea. We attempted to reveal the sedimentary evolution process of the canyon, and analyze its genetic controlling factors and stability. The evolution of Yongle Submarine Canyon can be divided into three stages: Embryonic stage, Convergence stage and Expansion stage. The development scale and sediment transportation is increasing with canyon evolution. The formation and evolution of the Yongle Submarine Canyon is mainly affected by the negative topography formed by paleogeomorphic uplift and the erosion of sediment gravity flow. There are still obvious signs of activity of the canyon after the Quaternary. The Yongle Submarine Canyon is an important material transport channel in the Northwest Sub-basin, and the analysis of its sedimentary evolution and stability carry significant implications for the study of deepwater sedimentary processes, such as carbonate platform sediment transport and island construction.

Key words: Yongle Submarine Canyon, carbonate canyon, erosion, evolution, stability

CLC Number: 

  • P737.21