古地理学报2011，Vol.13Issue(1)：119-126,8.
东海陆坡海底峡谷-扇体系沉积特征及物质搬运
Sedimentary characters and material transportation of submarine canyon-fan systems in slope of the East China Sea
摘要
Abstract
Based on multi-beam bathymetric and high-resolution seismic data, studies including sedimentary stratigraphic structure, transportation and typical sediment environments of the submarine canyon—fan systems in the slope of the East China Sea have been carried out. The results show that canyons on the slope are the main pathways to transport sediments from the upper to the lower part of the slope.Gullies, channels developing in the canyons and several depostional bodies indicate that the erosion domains the upper canyons section. Slumps or landslides with mound-shaped or lens-shaped are only deposited in some canyons with local fiat valley bottom. Submarine fans usually developed at the exits of the canyons. They have different sediment structures at different positions, but most of them are characterized by chaotic, progradational or onlap seismic reflection configuration. The channels are pathways to transport turbidity currents. The overbank deposits with a wedge shape, mainly consisting of fine-grained sediments, usually developed along both sides of the channels. Turbidite is the main part of deposition fan.Mass wastes mainly including slumps and landslides and turbidity current are the main way of sediment transportation in canyon—fan systems and play important roles in reshaping the morphology of the submarine canyon system. Different sediment characters of the canyon-fan systems from the north to the south indicate different source supply, hydrodynamic conditions and tectonic activities.关键词
海底峡谷-扇体系/沉积特征/块体搬运/浊流/东海陆坡Key words
submarine canyon—fan system/sedimentary character/ material transportation/turbidite/ slope of East China Sea分类
天文与地球科学引用本文复制引用
赵月霞,刘保华,李西双,崔爱菊,韩国忠,华清峰,胡广海..东海陆坡海底峡谷-扇体系沉积特征及物质搬运[J].古地理学报,2011,13(1):119-126,8.基金项目
国家自然科学基金项目(编号:40576033,40506018)和国家海洋局青年基金项目(编号:2006306)联合资助 （编号:40576033,40506018）
