海洋地质前沿2017，Vol.33Issue(8)：11-17,7.DOI:10.16028/j.1009-2722.2017.08002
南海西部陆坡平顶海山和海丘地形特征
DISTRIBUTION OF GUYOTS ON THE NORTHWESTERN SLOPE OF SOUTH CHINA SEA AND THEIR TOPOGRAPHIC FEATURES
摘要
Abstract
The Ocean Drilling Program has made clear the internal structure of guyots in the west Pacific.However,little literatures are available in the region of the South China Sea concerning guyots or flat-top seamounts.Recently,on the northwestern slope of the South China Sea we have found nine flat-top seamounts and knolls exceeding 3 km2 in area based on multi-beam bathymetric data.In this paper,the topographic features of these guyotsare analyzed.It is found that they are mainly distributed on some topographic rises near submarine platforms submerged undera water depth of 184-631m.The most obvious one is the Pingnan Seamount to the north of the Zhongsha Islands.It consists of several small flat-top seamounts in a northwest line,rather similar tothe Megallan Seamounts in the West Pacific.According to the evolutionary model of theguyots in the west Pacific,the flat-top topographic featuresstarted from volcanic islands.They were erodedwhen they were close to the sea level,and coral reefs would develop to compensate the subsidence and made the top flat.Certainly the identification of flat-top seamounts and knolls in the South China Sea will help future geological and geophysical surveys in the region though the evolutionary details are not clear at present.关键词
南海/西部陆坡/平顶海山/地形特征Key words
South China Sea/northwestern slope/flat-top seamounts/topographic features分类
海洋科学引用本文复制引用
张伙带,朱本铎,黄文星,刘丽强,陈泓君..南海西部陆坡平顶海山和海丘地形特征[J].海洋地质前沿,2017,33(8):11-17,7.基金项目
国土资源部海底矿产资源重点实验室开放基金课题(KLMMR-2015-A-05) （KLMMR-2015-A-05）
国家自然科学基金(91428207) （91428207）
