热带地理Issue(1)：10-18,9.DOI:10.13284/j.cnki.rddl.002810
南海西沙海域甘泉海台的阶梯状地形
Terrace Topographyof the Ganquan Plateau in the Xisha Area of the South China Sea
摘要
Abstract
Topography of the Ganquan Plateau in the Xisha area of the South China Sea was studied using multibeam bathymetric data. The top of the Ganquan Plateau was flat with slopesgenerally less than 1°, but the topography was a three-level terrace tilting toward the southwest with water depth ranging from 550–700 m. At water depth of 600–850 m, submarine terraces commonly developed with up to 5 levels recognized, and the terraces in the west were more developed than those in the east of the Ganquan Plateau. It is preliminarily believed that the top and peripheral terrace topography of the Ganquan Plateau was a result of the combined effects oftheglobal sea level change at the timescale of glacial-interglacial cycle and the crust subsidence of the South China Sea. These two influencing factors might control the development of the other coral reefs in the South China Sea as well. Talus topography developed at the periphery of the Ganquan Plateau at water depth between 850 and 1300 m, which is speculated to result from deposits of coral fragments transported from the top of reefs. The more developed talus topography in the northwest compared to that in the southeast might be directly related to the southwest tilt of the top of the Ganquan Plateau.关键词
珊瑚礁/阶梯状地形/甘泉海台/南海西沙海域/海平面变化/地壳沉降Key words
coral reefs/terrace topography/Ganquan Plateau/Xisha area of the South China Sea/sea level fluctuation/crust subsidence分类
海洋科学引用本文复制引用
张江勇,黄文星,刘胜旋,姜大朋..南海西沙海域甘泉海台的阶梯状地形[J].热带地理,2016,(1):10-18,9.基金项目
国家自然科学青年基金项目（41306042）；同济大学海洋地质国家重点实验室开放基金项目 （）
