张伙带, 朱本铎, 关永贤, 杨胜雄. 基于多波束数据的南海海盆洋壳区海山地形特征[J]. 海洋地质与第四纪地质, 2017, 37(6): 149-157. DOI: 10.16562/j.cnki.0256-1492.2017.06.016
引用本文: 张伙带, 朱本铎, 关永贤, 杨胜雄. 基于多波束数据的南海海盆洋壳区海山地形特征[J]. 海洋地质与第四纪地质, 2017, 37(6): 149-157. DOI: 10.16562/j.cnki.0256-1492.2017.06.016
ZHANG Huodai, ZHU Benduo, GUAN Yongxian, YANG Shengxiong. TOPOGRAPHIC FEATURES OF THE SEAMOUNTS IN THECENTRAL BASIN OF THE SOUTH CHINA SEA:BASED ON MULTI-BEAM BATHYMETRIC DATA[J]. Marine Geology & Quaternary Geology, 2017, 37(6): 149-157. DOI: 10.16562/j.cnki.0256-1492.2017.06.016
Citation: ZHANG Huodai, ZHU Benduo, GUAN Yongxian, YANG Shengxiong. TOPOGRAPHIC FEATURES OF THE SEAMOUNTS IN THECENTRAL BASIN OF THE SOUTH CHINA SEA:BASED ON MULTI-BEAM BATHYMETRIC DATA[J]. Marine Geology & Quaternary Geology, 2017, 37(6): 149-157. DOI: 10.16562/j.cnki.0256-1492.2017.06.016

基于多波束数据的南海海盆洋壳区海山地形特征

TOPOGRAPHIC FEATURES OF THE SEAMOUNTS IN THECENTRAL BASIN OF THE SOUTH CHINA SEA:BASED ON MULTI-BEAM BATHYMETRIC DATA

  • 摘要: 利用全覆盖的多波束数据,聚集南海海盆洋壳区,统计分析了海山的地形特征,并展示了典型海山和海丘的地形。统计结果表明,研究区发育高差1 000 m以上的海山约46个,高差1 000~500 m的海丘约90个, 高差500~200 m的海丘约100个。多波束数据揭示了海山和海丘更加精细的形态特征,如部分海山和海丘顶部保留的火山口形态。同时,发现研究区众多海山和海丘一侧山坡为陡峭的断面,推测为一系列的小断裂切割形成。基于海山和海丘的地形断面分布特征探讨了中南断裂的位置,推测中南断裂可能是由两组南北向平行的断裂及中间区域组成的断裂带。

     

    Abstract: Upon the multi-beam bathymetric survey of the central basin of the SCS (South China Sea) in the past decades, submarine topography of the basin has become clearer. This paper is devoted to the study of the topographic features of seamounts and knolls in SCS central basin based on the multi-beam bathymetric data from Guangzhou Marine Geological Survey. Three dimensional topographic maps of typical seamounts and knolls are exhibited to reveal how the seamounts and knolls in SCS central basin look like. Statistics suggest that there are about 46 seamounts, 90 knolls with height difference in 1000-500m and about 100 knolls with height difference in 500-200m in the SCS central basin. Multi-beam bathymetric data shows finer terrain information than ever before. For examples, volcanic vents on the top of seamounts and knolls are discovered and steep slopes observed on some seamounts and knolls, probably caused by faults. Based on the distribution pattern of steep slopes, we inferred that the Zhongnan fault is actually a fault zone, consisting of two parallel N-S faults and the region between them.

     

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