Deep-water tractive deposition in Zhujiang formation Baiyun sag, Zhujiang River Mouth Basin and its geological implications

LI Yun; ZHENG Rongcai; ZHU Guojin; HU Xiaoqing

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Article Navigation > Haiyang Xuebao > 2012 > 34(1): 127-135

LI Yun, ZHENG Rongcai, ZHU Guojin, HU Xiaoqing. Deep-water tractive deposition in Zhujiang formation Baiyun sag, Zhujiang River Mouth Basin and its geological implications[J]. Haiyang Xuebao, 2012, 34(1): 127-135.

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Deep-water tractive deposition in Zhujiang formation Baiyun sag, Zhujiang River Mouth Basin and its geological implications

1.
State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
2.
China offshore Oil Research Center Research Center, Beijing 100027, China

Received Date: 2010-11-03
Rev Recd Date: 2011-03-31

Abstract

Abstract

The research on deep-water tractive deposition is extremely valuable for the palaeooceanographical and palaeoclimatic reconstruction, slope deposition studies and mineral and energy exploration.The abundance of tractive structures developed in Zhujiang formation,Baiyun sag,Zhujiang Basin.They included parallel-bedding fine sandstone and doubling mud layers, bidirectional cross-bedding silty-fine sandstone,wavy-bedding and flaser-bedding globigerina limestone, wavy-bedding and flaser-bedding siltstone and silty-fine sandstone, lenticular-bedding silty-fine sandstones. They were totally different from pelagic turbidite and hemipelagite-pelagite. Combining with the depositional setting, the rich tractive structures were believed as deep-water deposition. The discovery of the deep-water tractive deposition in Miocene Zhujiang formation would be of great importance. It could be inferred that a deep-water current had existed since the formation of the shelf-break during late Oligocene(23.8 Ma) in Baiyun sag, which influenced and controlled the resources and depositional processes in Zhujiang formation. The tractive current may influence and change the composition and its distribution. And this would have a great enlightenment to the reconstruction of the palaeo-ocean circulation in the south china sea. Further studies will be needed.
- Zhujiang River Mouth Basin,
- Baiyun sag,
- Miocene,
- Zhujiang formation,
- submarine fan,
- deep-water tractive current

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