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Distribution and development characteristics of submarine pockmarks on the south side of Riji Reef
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Jiahao Wang1, 2, Jihong Shang1, 2, *, Ziyin Wu1, 2, 3, Dineng Zhao1, 2, 4, Chao Zhu1, 2, 5, Zhihao Liu1, 2, 3, Binghao Cui1, 2, 6
Haiyang Xuebao | 2023, 45(6) : 62 - 74
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Haiyang Xuebao | 2023, 45(6): 62-74
• Article •
Distribution and development characteristics of submarine pockmarks on the south side of Riji Reef
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Jiahao Wang1, 2, Jihong Shang1, 2, *, Ziyin Wu1, 2, 3, Dineng Zhao1, 2, 4, Chao Zhu1, 2, 5, Zhihao Liu1, 2, 3, Binghao Cui1, 2, 6
Affiliations
  • 1Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  • 2Key Laboratory of Submarine Geoscience, Ministry of Natural Resources, Hangzhou 310012, China
  • 3School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China
  • 4Donghai Laboratory, Zhoushan, 316021, China
  • 5Ocean College, Zhejiang University, Hangzhou 316021, China
  • 6College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
Published: 2023-06-30 doi: 10.12284/hyxb2023089
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Submarine pockmark is a depression landform formed by fluid spilling out of the seabed along the migration path and eroding the seafloor sediments. In this paper, the distribution and development of pockmarks on the south side of Riji Reef in the South China Sea are studied by using high-resolution bathymetric data and sub-bottom profile data. Based on the characteristics of high-resolution geomorphology and the laws of sub-bottom profile, 219 large scale pockmarks in the area were identified and counted, there is weak correlation between seawater depth and pockmark scale: seawater depth has no obvious positive correlation with diameter and depth of pockmark, and has no obvious negative correlation with inner slope of pockmark. It reveals the internal relationship between the special geomorphology and the distribution, shape and change of pockmark: the round and elliptical pockmarks are mostly distributed on the top of the sea knoll, the half-moon type pockmarks are mostly distributed in the middle and lower part of the sea knoll, while the bead-like elongated type pockmarks are mainly distributed in the canyon between the deep sea knolls. It is concluded that the change of the pockmark shape and scale which are from the top of the sea knoll to the canyon directly corresponds to the development process of the pockmark in different stages, and that the pockmarks are essentially influenced by the tectonics and dynamics control of the area.

pockmark  /  tectonic geomorphology  /  genesis  /  evolution
Jiahao Wang, Jihong Shang, Ziyin Wu, Dineng Zhao, Chao Zhu, Zhihao Liu, Binghao Cui. Distribution and development characteristics of submarine pockmarks on the south side of Riji Reef[J]. Haiyang Xuebao, 2023 , 45 (6) : 62 -74 . DOI: 10.12284/hyxb2023089
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Article Info
doi: 10.12284/hyxb2023089
  • Receive Date：2022-10-27
  • Online Date：2025-12-26
  • Published：2023-06-30
Article Data
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History
  • Received：2022-10-27
  • Revised：2023-01-17
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Affiliations
    1Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
    2Key Laboratory of Submarine Geoscience, Ministry of Natural Resources, Hangzhou 310012, China
    3School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China
    4Donghai Laboratory, Zhoushan, 316021, China
    5Ocean College, Zhejiang University, Hangzhou 316021, China
    6College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
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species		 占总种数比例
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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