SEISMOLOGY AND GEOLOGY ›› 2013, Vol. 35 ›› Issue (2): 278-289.DOI: 10.3969/j.issn.0253-4967.2013.02.007

• Research Paper • Previous Articles     Next Articles

CRUSTAL STRUCTURE AND ITS FEATURES IN THE SOUTHWEST MARGIN OF BOHAI BAY AND ADJACENT AREAS

WANG Shuai-jun1, WANG Fu-yun1, ZHANG Jian-shi1, ZHENG Yan-peng2, ZHANG Cheng-ke1, ZHAO Jin-ren1, LIU Bao-feng1, Huang Can3   

  1. 1. Research Center of Exploration Geophysics,China Earthquake Administration,Zhengzhou 450002,China;
    2. First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China;
    3. Zhengzhou Seismic Station,Zhengzhou 450062,China
  • Received:2012-08-25 Revised:2012-12-16 Online:2013-06-30 Published:2013-07-11

渤海湾西南缘及其邻近地区地壳结构特征

王帅军1, 王夫运1, 张建狮1, 郑彦鹏2, 张成科1, 赵金仁1, 刘宝峰1, 黄灿3   

  1. 1. 中国地震局地球物理勘探中心, 郑州 450002;
    2. 国家海洋局第一海洋研究所, 青岛 266061;
    3. 郑州地震台, 郑州 450062
  • 通讯作者: 张建狮
  • 基金资助:

    863项目"海陆联合深部地球物理探测关键技术研究"(2009AA093401)资助. 中国地震局地球物理勘探中心论著号RCEG201113.

Abstract:

DSS data of Bohai Bay profile was processed in August 2011 and the result obtained in this paper and the results of other profiles,which cross this profile,were interpreted comprehensively in this paper. The DSS data were calculated and interpreted synthetically using 1-D and 2-D processing techniques in order to find out the basic features of 2-D velocity structures,spatial distribution of faults,geological structure of shallow and deep crust in the southwest margin of Bohai Bay and adjacent areas. The result shows that obvious layered structure appears along the profile,and the crustal velocity structures in different regions have obvious heterogeneity in the lateral and vertical directions. The crystalline basement near the Bohai Bay is gradually thinning southwestwards,and beneath the 220km Stake,the depth of G interface is 7.4km. The thickness of the middle layer varies greatly,with the change range up to 4.0km. The crustal depth varies relatively moderately,with a change range of about 2.0km. The Moho deepens gradually from coastal area to the inland along the southwest direction.

Key words: deep seismic sounding, velocity structure, crust, Bohai Bay

摘要:

利用2011年8月在渤海湾的探测剖面资料及其周缘地震测深剖面的结果,对渤海湾探测剖面的数据资料进行一、二维处理,计算和综合解释研究,获得了渤海湾西南缘及其邻近地区二维地壳速度结构和构造的基本特征、断层的空间展布特征和深浅部地质构造环境等.研究结果表明,沿剖面具有明显的层状结构,不同区域的地壳速度结构在纵向和横向上均具有明显的非均匀性.基底厚度由渤海湾附近向SW方向逐渐减薄,在220km桩号下方G界面的埋深为7.4km.中间层厚度变化较大,变化幅度达4.0km.莫霍面由沿海向SW方向逐渐加深,变化幅度为2.0km左右.

关键词: 地震测深, 速度结构, 地壳, 渤海湾

CLC Number: