Advances in Earth Science ›› 2007, Vol. 22 ›› Issue (9): 907-913. doi: 10.11867/j.issn.1001-8166.2007.09.0907

Special Issue: IODP

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Current Status of Deep-water Sediment Wave Studies and the South China Sea Perspectives

ZHONG Guang-fa 1, LI Qian-yu 1, HAO Hu-jun 2, WANG Liao-liang 3   

  1. 1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;2. Shenzhen Branch of CNOOC Limited, Shenzhen 518067, China;3.Guangzhou Marine Geological Survey, Guangzhou 510760, China
  • Received:2007-06-04 Revised:2007-08-20 Online:2007-09-15 Published:2007-09-10

ZHONG Guang-fa, LI Qian-yu, HAO Hu-jun, WANG Liao-liang. Current Status of Deep-water Sediment Wave Studies and the South China Sea Perspectives[J]. Advances in Earth Science, 2007, 22(9): 907-913.

Research on deep-water sediment waves was initiated in the 1950's. So far, significant progress has been achieved. It is been known that deep-water sediment waves are generated mainly by bottom currents or turbidity currents. Four main catalogues of deep-water sediment waves have been recognized according to their grain size of component sediments and formation processes: fine-grained bottom current sediment waves, coarse-grained bottom current sediment waves, finegrained turbidity current sediment waves, and coarse-grained turbidity current sediment waves. Models presented for the formation of deep-water sediment waves include lee-wave model, antidune model, internal wave model and mixed bedform and failure model. Newly-acquired high-resolution seismic data revealed that the sediment drift with high deposition rates on the slope offshore Dongsha Islands, northern South China Sea was actually composed of a series of sediment waves migrated upslope. This finding is of great significance not only to the reconstruction of paleoceanography, paleoenvironment, paleo-tectonics, and paleoclimate, but also to deep-water petroleum exploration in the South China Sea.

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