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| 平潭海域地震层序及地层层序特征 | |
| 引用本文： | 许江,朱嘉,张异彪,赵绍华.平潭海域地震层序及地层层序特征[J].地球物理学进展,2010,25(2):396-402. |
| 作者姓名： | 许江 朱嘉 张异彪 赵绍华 |
| 作者单位： | 1. 中国地质大学地球物理与空间信息学院,武汉,430074;国家海洋局第三海洋研究所,厦门,361005 2. 国家海洋局第三海洋研究所,厦门,361005 3. 上海海洋石油物探公司,上海,201208 |
| 基金项目： | 国家海洋局第三海洋研究所基本科研业务费专项资金项目（海三科2007019）资助. |
| 摘 要： | 高分辨率地震勘探技术是进行浅部地质勘探较经济有效的方法，应用DAS-1型高分辨率数字地震仪对平潭海域地层层序进行了探测研究.通过地震资料的解释，根据地震反射波及反射界面特征，共划分出T01、T11、T02、T03、T04、T05及Tg等七个反射界面，其中以角度不整合界面T03为界将本区的沉积地层划为两大套，二者之间曾经发生过一次规模较大的构造运动；Tg为地震勘探的声波基底.依据地震层序划分原则和方法，自上而下将基底反射界面以上的地震反射层划为不同的七个地震层序，即：Ⅰ（海底面～T01）、Ⅱ（T01～T11）、Ⅲ（T11～T02）、Ⅳ（T02～T03）、Ⅴ（T03～T04）、Ⅵ（T03、T04～T05）及Ⅶ（T05～Tg）层序.经与研究区内以及相邻海域已知地质资料的对比分析，大致确定该海域七个不同地震层序的地质年代分别为：Q3～Q4、Q2、N2、N1、E2、E1、K2，研究区域的沉积基底可能由中生代（J3～K1）中酸性火山岩系及燕山期中酸性侵入岩或混合岩组成. |
| 关 键 词： | 高分辨地震勘探 地震层序 地层层序 |
| 收稿时间： | 2009-10-15 |
| 修稿时间： | 2009-12-20 |
Characteristics of seismic sequence and stratigraphic sequence in the Pingtan sea area |
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| XU Jiang,ZHU Jia,ZHANG Yi-biao,ZHAO Shao-hua.Characteristics of seismic sequence and stratigraphic sequence in the Pingtan sea area[J].Progress in Geophysics,2010,25(2):396-402. | |
| Authors: | XU Jiang ZHU Jia ZHANG Yi-biao ZHAO Shao-hua |
| Institution: | (1.Institute of Geophysics and Geomatics,China University of Geosciences, Wuhan 430074 China; 2.Third Institute of Oceanography,Xiamen 361005,China; 3. Shanghai Offshore Petroleum Geophysical Corporation,Shanghai 201208,China) |
| Abstract: | The technique of high resolution multi-channel seismic exploration is a most cost-effective way for shallow geological exploration.Using the DAS-1 high resolution multi-channel seismic instrument,we surveyed the stratigraphic sequence of the Pingtan sea area.Based on the interpretation of the multi-channel seismic data,according to the characteristics of seismic reflection records and reflector,the whole seismic retlecting layers can be divided into 7 different reflectors marked as T01,T11,T02,T03,T04,T05 and Tg.T03 reflector is an angular unconformity interface,while Tg reflector is the acoustic basement for the seismic exploration.Taking T03 reflector as the boundary,the sedimentary strata in this area can be divided into two major sets,that is to say,there is a strong tectonic movement have taken place between them.Based on the principle of division of the seismic sequence and methods,the seismic strata which are upon the basement of the seismic reflection can be divided into 7 different seismic sequences from the top to the bottom in this area,which are marked as follows:Ⅰ(sea floor～T01),Ⅱ(T01～T11),Ⅲ(T11～T02),Ⅳ(T02～T03),Ⅴ(T03～T04),Ⅵ(T03,T04～T05)and Ⅶ(T05～Tg).Compared with the geological data of adjacent areas,these seismic sequences separately belong to the era of Q3～Q4,Q2,N2,N1,E2,E1,and K2.The sedimentary basement may consist of intermediate acidity volcanies that formed in Mesozoic(J3～K1)and intermediate acidity intrusive rock or mixed rock formed in the Yanshan era. |
| Keywords: | high resolution seismic exploration seismic sequence stratigraphic sequence |
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