《南海北部陆坡地震地貌及重力流沉积过程.》.pdf

SCIENCE CHINA Earth Sciences • RESEARCH PAPER • doi: 10.1007/s11430-012-4396-1 doi: 10.1007/s11430-012-4396-1 Seismic geomorphology and main controls of deep-water gravity flow sedimentary process on the slope of the northern South China Sea 1* 2 3 1 3 LI Lei , WANG YingMin , XU Qiang , ZHAO JingZhou LI Dong 1 School of Petroleum Resources, Xi’an Shiyou University, Xi’an 710065, China; 2 College of Geosciences, China University of Petroleum, Beijing 102249, China; 3 CNOOC Research Institute, Beijing 100027, China Receive October 12, 2011; accepted January 17, 2012 The Quaternary continental slope of the Baiyun Sag in northern South China Sea is characterized by a complex topography and abundant gravity flow sedimentation. High-resolution 3-D seismic data in this area allow for a detailed study of the seismic geomorphology and deep-water gravity flow depositional process. The Quaternary continental slope in the northern South China Sea is an above-graded slope. An intraslope basin lies within the above-grade continental slope. Slump, erosion, and deposition processes tend to develop a gentle topography and consequently a gr