华南地震
華南地震
화남지진
SOUTH CHINA JOURNAL OF SEISMOLOGY
2014年
2期
96-102
,共7页
大巴山构造带%航磁异常%帕克尔界面反演%磁性结晶基底%四川盆地东北边界
大巴山構造帶%航磁異常%帕剋爾界麵反縯%磁性結晶基底%四川盆地東北邊界
대파산구조대%항자이상%파극이계면반연%자성결정기저%사천분지동북변계
Daba tectonic zone%Aeromagnetic anomalies%Parker boundary layer inversion%Magnetic crystalline basement%Northeast border of Sichuan basin
对大巴山地区最新1：20万航磁资料进行处理，分析大巴山地区航磁异常特点，找出推覆体下磁性结晶基底存在的证据；通过帕克尔界面反演法定量反演计算出磁性结晶基底的深度及范围，确定四川盆地的结晶基底应以陕西安康-竹山断裂为界；重新厘定盆地东北部边界，计算出大巴山推覆带推覆距离约100 km，并推测推覆带下可能存在四川盆地沉积地层。为巴山地区深浅部构造关系的系统解析以及四川盆地油气勘探远景提供一定的参考。
對大巴山地區最新1：20萬航磁資料進行處理，分析大巴山地區航磁異常特點，找齣推覆體下磁性結晶基底存在的證據；通過帕剋爾界麵反縯法定量反縯計算齣磁性結晶基底的深度及範圍，確定四川盆地的結晶基底應以陝西安康-竹山斷裂為界；重新釐定盆地東北部邊界，計算齣大巴山推覆帶推覆距離約100 km，併推測推覆帶下可能存在四川盆地沉積地層。為巴山地區深淺部構造關繫的繫統解析以及四川盆地油氣勘探遠景提供一定的參攷。
대대파산지구최신1：20만항자자료진행처리，분석대파산지구항자이상특점，조출추복체하자성결정기저존재적증거；통과파극이계면반연법정량반연계산출자성결정기저적심도급범위，학정사천분지적결정기저응이협서안강-죽산단렬위계；중신전정분지동북부변계，계산출대파산추복대추복거리약100 km，병추측추복대하가능존재사천분지침적지층。위파산지구심천부구조관계적계통해석이급사천분지유기감탐원경제공일정적삼고。
The authors processed the latest 1: 200 000 airborne magnetic data of Dabashan area, analyzed the aeromagnetic anomaly characteristics, and found out the evidence of the existence of magnetic crystalline basement; through parker boundary layer quantitative inversion method, the authors calculated the depth and scope of the magnetic crystalline basement, and determined that the crystalline basement of Sichuan basin extended to the Ankang-Zhushan fracture community in the north-east direction, meanwhile the authors redefined the northeastern boundary of basin, calculated the napped distance of Daba Mountain nappe of about 100 km, and presumed that there might existed sedimentary strata below the nappe. The conclusions could provide a reference for the system analysis of the relationship between deep and shallow structure and the long-range perspective of oil and gas exploration in Sichuan Basin.
