东大别地区岩石圈磁场分布与构造关系分析

以东大别地区（115~117.5°E，29.5~32.5°N）岩石圈磁场为基础，通过分解、反演获得岩石圈磁场浅表模型、岩石圈磁场深部模型以及居里等温面埋深分布模型等地下介质磁性结构模型。通过对相关磁异常分布特征的分析发现，东大别地区岩石圈磁场在江淮台隆、郯庐断裂带、下扬子台坳构造地区呈正异常条带或团块分布，在北淮阳褶皱带则是以一条EW向巨大负异常通过。对比岩石圈磁场与浅表磁场发现区内几条隐伏断层的走向及切割深度；岩石圈深部磁场在一定程度上反映区内岩石圈基底的分布及构成；居里面埋深可揭示区内岩浆活动的分布情况。

Analysis of Relationship of Lithosphere Geomagnetic Field and Tectonic in Eastern-Dabie Area

This paper considers the lithosphere magnetic field of eastern-Dabie area (115~117.5°E,29.5~32.5°N). Through analysis and inversion, we get geomagnetic structure models of underground media, such as the shallow model of lithosphere geomagnetic field, deep model of lithosphere geomagnetic field and the depth distribution model of Curie interface. By analyzing features of distribution of some related magnetic anomalies, we discover that the positive anomaly magnetic field of lithosphere in eastern-Dabie area is in the structural unit of Jianghuai promontory, Tancheng-Lujiang fault zone and the depression of lower Yangtze platform; a huge EW trend geomagnetic negative anomaly passes through the northern Huaiyang fold belt. Comparing the magnetic field of lithosphere and the shallow model of lithosphere, we are able to discover some trends of hidden fault and depth of cut. The deep model of lithosphere magnetic field, to some extent, reflects the distribution and structure of the lithosphere basement in this area. Furthermore, the depth of Curie interface could reveal the distribution of magma activities in this area.