OALib Journal期刊
ANALYSIS ON DEEP CRUSTAL STRUCTURE ALONG THE ONSHORE-OFFSHORE SEISMIC PROFILE ACROSS THE BINHAI (LITTORAL) FAULT ZONE IN NORTHEASTERN SOUTH CHINA SEA
ZHAO Ming-Hui ,
QIU Xue-Lin YE Chun-Ming XIA Kan-Yuan HUANG Ci-Liu XIE Jian-Bo WANG Ping Institute of Oceanology ,
Chinese Academy of Sciences ,
Qingdao ,
China Laboratory of Marginal Sea Geology ,
South China Sea Institute of Oceanology & Guangzhou Institute of Geochemistry ,
Chinese Academy of Sciences ,
Guangzhou ,
China Earthquake Administration of Guangdong Province ,
Guangzhou ,
China ,
,
丘学林 ,
叶春明 ,
夏戡原 ,
黄慈流 ,
谢剑波 ,
王平 Keywords: Northeastern South China Sea ,Onshore-offshore deep seismic experiment ,Binhai(littoral)fault zone ,Crustal structure ,Low-velocity layer ,断裂带 ,地震数据 ,地壳结构 ,低速层
Abstract:
南海东北部首次成功实施海陆联合深地震探测 ,填补了海陆过渡带深地震探测的空白 .利用该次海陆联测地震数据 ,通过数据处理、震相分析、射线追踪、走时模拟等方法 ,获得了滨海断裂带附近的纵波地壳速度结构 ,探明了海陆联测剖面中滨海断裂带可能位置 .地壳速度结构为陆壳结构 ,地壳厚度由陆地向海区逐步变薄 ;在上地壳下部普遍存在一层速度为 5 .5～ 5 .9km·s-1、厚度为 2 .5～ 4 .0km的低速层 ,并向海区方向减薄 ,该区未发现明显的高速层 .滨海断裂带为一纵向低速带 ,位于南澳台东南 35km处 ,对应于重、磁异常带 ,断裂带断至莫霍面 ,是华南陆区正常型陆壳与海区减薄型陆壳的分界地壳断裂 .
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