南沙海域海底浅层第四系地震地层结构与地质意义

陈洁, 万荣胜, 张金鹏, 韩冰, 苏世龙. 2018. 南沙海域海底浅层第四系地震地层结构与地质意义. 地球物理学报, 61(1): 242-249, doi: 10.6038/cjg2018K0549
引用本文: 陈洁, 万荣胜, 张金鹏, 韩冰, 苏世龙. 2018. 南沙海域海底浅层第四系地震地层结构与地质意义. 地球物理学报, 61(1): 242-249, doi: 10.6038/cjg2018K0549
CHEN Jie, WAN RongSheng, ZHANG JinPeng, HAN Bin, SU ShiLong. 2018. Seismic stratigraphic structure of shallow seabeds around Nansha Islands and geological implications. Chinese Journal of Geophysics (in Chinese), 61(1): 242-249, doi: 10.6038/cjg2018K0549
Citation: CHEN Jie, WAN RongSheng, ZHANG JinPeng, HAN Bin, SU ShiLong. 2018. Seismic stratigraphic structure of shallow seabeds around Nansha Islands and geological implications. Chinese Journal of Geophysics (in Chinese), 61(1): 242-249, doi: 10.6038/cjg2018K0549

南沙海域海底浅层第四系地震地层结构与地质意义

  • 基金项目:

    国家重点研发计划(2016YFC0303000,2016YFC0303005)和国家自然科学基金(41476087)联合资助

详细信息
    作者简介:

    陈洁, 教授, 主要从事地球物理、油气勘探、石油地质和海洋地质研究.E-mail:chenjgz@126.com

  • 中图分类号: P738

Seismic stratigraphic structure of shallow seabeds around Nansha Islands and geological implications

  • 科技进步使得地震采集数据量及其精度实现质的飞跃,南沙海域的地震调查,采用国际先进水平的等离子震源,获得地震剖面精度优于3 m局部甚至可在1 m之内,为科学研究、工程、浅层资源、地质灾害预警等研究奠定基础.在南沙第四系识别出了七个地震反射界面,确定500 ms至海底沉积区间内地震层序与三期海平面升降并与冰期、间冰期对应,典型地震剖面展示第四纪至少有三套完整的具有三角洲顶积层、前积层、底积层的地震相证据,与全球的第四纪海平面的变化一致.精细的浅层地震结构表明:南沙的地质现象丰富,浅层断层非常发育,下切河谷、泥石流、滑坡等地质遗迹的形成的地震相清晰,是地质活动频繁的地区.

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  • 图 1 

    测线位置图

    Figure 1. 

    Map showing location of survey lines

    图 2 

    原始单道地震剖面

    Figure 2. 

    Original single-channel seismic profiles

    图 3 

    南海南部南沙海域地震层序及其划分简表

    Figure 3. 

    Seismic sequence and its division in Nansha of the southern South China Sea

    图 4 

    A-A′北段放大剖面的精细解释

    Figure 4. 

    Fine interpretation of enlarged part in northern section of A-A′ profile

    图 5 

    中国南海南部南沙海域地震地层关系

    Figure 5. 

    Seismic stratigraphic relationships of Nasha area of South China Sea

    图 6 

    B-B′典型剖面北段放大剖面的精细解释

    Figure 6. 

    Fine interpretation of enlarged part in northern section of profile B-B′

    表 1 

    中国地层表(第四系)(中国地质调查局,2012)

    Table 1. 

    Stratigraphic chart of China (Quaternary) (China Geological Survey, 2012)

    下载: 导出CSV
  •  

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出版历程
收稿日期:  2016-10-06
修回日期:  2017-02-02
上线日期:  2018-01-05

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