南海北缘一统暗沙附近深水等深流沉积体系特征

陈慧; 解习农; 毛凯楠

doi:10.3799/dqkx.2015.061

Volume 40 Issue 4

Apr. 2015

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Chen Hui, Xie Xinong, Mao Kainan, 2015. Deep-Water Contourite Depositional System in Vicinity of Yi'tong Shoal on Northern Margin of the South China Sea. Earth Science, 40(4): 733-743. doi: 10.3799/dqkx.2015.061

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Chen Hui, Xie Xinong, Mao Kainan, 2015. Deep-Water Contourite Depositional System in Vicinity of Yi'tong Shoal on Northern Margin of the South China Sea. Earth Science, 40(4): 733-743. doi: 10.3799/dqkx.2015.061

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Deep-Water Contourite Depositional System in Vicinity of Yi'tong Shoal on Northern Margin of the South China Sea

doi: 10.3799/dqkx.2015.061

Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China

Received Date: 2014-07-25
Publish Date: 2015-04-01

Abstract

Abstract

Using high-resolution 2D seismic data, this study reveals the presence of a deep-water contourite depositional system that developed in vicinity of the Yi'tong Shoal (700-1 000 m depth), on the northern margin of the South China Sea. The development of a moat north of the Yi'tong Shoal indicates eastward flowing bottom currents, which might belong to the South China Sea Intermediate Water Circulation. Due to the coriolis deflection, an elongated-mounded drift is developed to the north of the moat. A marginal trough, a plastered drift and a deposition zone developed south of the Yi'tong Shoal, indicative of relatively weak hydrodynamics in the south side. A shadow zone downstream of the Yi'tong Shoal was generated where the currents slowed down, developing a depositional tail. Seismic stratigraphy shows that the initial development of the deep-water contourite depositional system was developed from the early Late Miocene (11.6 Ma).
- Yi'tong Shoal,
- deep-water contourite depositional system,
- bottom current,
- marine geology

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References(62)

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Deep-Water Contourite Depositional System in Vicinity of Yi'tong Shoal on Northern Margin of the South China Sea

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