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冀北坳陷大地电磁测深研究
Magnetotelluric sounding study of the northern Hebei depression
【摘要】 根据冀北坳陷化皮-翟杖子剖面大地电磁测深结果,划分了具有不同电性特征的地层沿剖面的变化格局,确定了基底起伏形态,推断了断层分布位置。沿剖面分布有3个隐伏局部构造,分别为瀑河构造、塔子山构造和翟杖子构造,其中瀑河构造和翟杖子构造具有油气远景。党坝-小寺沟断裂和双洞南断裂为构造控制断裂,将剖面分为3个断陷区,北店-抬头山断裂为一条较大的西倾逆断裂,常州沟组逆冲超覆在雾迷山组之上,断距近4000m。
【Abstract】 According to the results of magnetotelluric sounding of the Huap i-Zhaizhangzi profile in north-ern Hebei,the variation patterns of the stra ta with different electric characters have been distinguished a-long the profi le,the basement relief form determined and the location of fault distribution inferred.Along the profile there are three local buried structures,namely,th e Puhe structure,Tazishan structure and Zhaizhangzi structure,of which the Pu he and Zhaizhangzi structures have petroleum prospects.The Tan-ba-Xiaoxigou f ault and Shuangdong South fault are structurally controlling faults,which divid e the profile into three down-faulted areas;the Beidian-Taitoushan fault is a large west-dipping reverse fault;the Changzhougou Formation is thrust over th e Wumishan Formation,with a displacement of nearly4000m.
【Key words】 magn etotelluric sounding; static correction; qualitative analysis; interpretation by back ward de-duction;
- 【文献出处】 中国地质 ,Chinese Geology , 编辑部邮箱 ,2002年04期
- 【分类号】P631.3
- 【被引频次】4
- 【下载频次】127