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在对辽东湾滩海地区的海洋阵列大地电磁测深资料进行研究的基础上 ,结合地质、地震、重磁以及测井资料 ,利用二维有限元法对该区地质结构、构造特征进行了分析。结果表明郯庐断裂带对该区影响深远。郯庐断裂带北延部分在辽东湾地区有 4条大断裂 ,其中二界沟盖州滩断裂分割了该区古老的结晶基底 ,以东为鞍山群 ,以西为建平群 ;大洼海南断裂则控制了中上元古界的分布 ,中上元古界仅分布在该断裂西侧。郯庐断裂作为一整体又控制了中生界火山岩的分布 ,断裂西侧火山岩发育程度高于东侧。另外 ,利用电磁测深技术的勘探深度大这一优势 ,对该区进行了深部层圈结构的研究 ,幔内高导层的深度约为 6 0km ,是软流圈的反映 ,软流圈的起伏与该区的隆凹呈明显的镜相关系 ;壳内高导层的深度约为 2 0km ,是地壳在拉伸过程中形成的折离带的反映
Based on the study of the ocean array geomagnetic sounding data in the beach area of Liaodong Bay, the geological structure and tectonic features of the area are analyzed by means of two-dimensional finite element method based on the data of geology, earthquake, gravity and magnetism and well logging . The results show that the Tan-Lu fault zone has a far-reaching impact on the area. There are 4 large faults in the Liaodong Bay area along the north extension of the Tanlu fault zone, in which the Gyeongju fault in Erjiegou divides the ancient crystalline basement in the area into Anshan group to the east and Jianping group to the west; Controlled the distribution of the Mesoproterozoic Proterozoic, the middle and upper Proterozoic only distributed in the west of the fault. The Tan-Lu fault as a whole controls the distribution of Mesozoic volcanic rocks. The volcanic rocks on the west side of the fault developed more deeply than the east. In addition, by using the deep exploration depth of electromagnetic sounding technology, deep lap structure was studied in this area. The depth of the high-conductivity layer in the mantle is about 60 km, which is a reflection of the asthenosphere. The undulation has a clear mirror relationship with the Longqian in this area. The depth of the high-conductivity layer in the crust is about 20 km, which is a reflection of the break-away zone formed during the crustal crustal stretching