地球物理学进展
地毬物理學進展
지구물이학진전
PROGRESS IN GEOPHYSICS
2010年
2期
396-402
,共7页
许江%朱嘉%张异彪%赵绍华
許江%硃嘉%張異彪%趙紹華
허강%주가%장이표%조소화
高分辨地震勘探%地震层序%地层层序
高分辨地震勘探%地震層序%地層層序
고분변지진감탐%지진층서%지층층서
high resolution seismic exploration%seismic sequence%stratigraphic sequence
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Ⅷ(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.
高分辨率地震勘探技術是進行淺部地質勘探較經濟有效的方法,應用DAS-1型高分辨率數字地震儀對平潭海域地層層序進行瞭探測研究.通過地震資料的解釋,根據地震反射波及反射界麵特徵,共劃分齣T01、T11、T02、T03、T04、T05及Tg等七箇反射界麵,其中以角度不整閤界麵T03為界將本區的沉積地層劃為兩大套,二者之間曾經髮生過一次規模較大的構造運動;Tg為地震勘探的聲波基底.依據地震層序劃分原則和方法,自上而下將基底反射界麵以上的地震反射層劃為不同的七箇地震層序,即:Ⅰ(海底麵~T01)、Ⅱ(T01~T11)、Ⅲ(T11~T02)、Ⅳ(T02~T03)、Ⅴ(T03~T04)、Ⅵ(T03、T04~T05)及Ⅷ(T05~Tg)層序.經與研究區內以及相鄰海域已知地質資料的對比分析,大緻確定該海域七箇不同地震層序的地質年代分彆為:Q3~Q4、Q2、N2、N1、E2、E1、K2,研究區域的沉積基底可能由中生代(J3~K1)中痠性火山巖繫及燕山期中痠性侵入巖或混閤巖組成.
고분변솔지진감탐기술시진행천부지질감탐교경제유효적방법,응용DAS-1형고분변솔수자지진의대평담해역지층층서진행료탐측연구.통과지진자료적해석,근거지진반사파급반사계면특정,공화분출T01、T11、T02、T03、T04、T05급Tg등칠개반사계면,기중이각도불정합계면T03위계장본구적침적지층화위량대투,이자지간증경발생과일차규모교대적구조운동;Tg위지진감탐적성파기저.의거지진층서화분원칙화방법,자상이하장기저반사계면이상적지진반사층화위불동적칠개지진층서,즉:Ⅰ(해저면~T01)、Ⅱ(T01~T11)、Ⅲ(T11~T02)、Ⅳ(T02~T03)、Ⅴ(T03~T04)、Ⅵ(T03、T04~T05)급Ⅷ(T05~Tg)층서.경여연구구내이급상린해역이지지질자료적대비분석,대치학정해해역칠개불동지진층서적지질년대분별위:Q3~Q4、Q2、N2、N1、E2、E1、K2,연구구역적침적기저가능유중생대(J3~K1)중산성화산암계급연산기중산성침입암혹혼합암조성.
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.