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研究区范围为北纬24°到32°,东经108°到126°,以扬子地台为主体(扬子地台东段),包含华南地槽系(东南部分),秦祁地槽系东段和华北地台南场部分。通过综合分析、处理研究区内地球物理资料,解释了研究区内的重大地质构造事件,主要得到如下认识:(1)该区在地质历史时期内发生过大规模的岩石圈皱陷,断裂构造发育,岩泉活动强烈,各类火成岩(特别是花岗岩)分布广泛且多样化;(2)该区呈多块体相互作用的拉伸、压缩区段,裂谷活动强烈。在这样的区内,是地壳、地幔物质交换的理想场所,给成矿物质运移和赋存提供有利的空间条件,是各类矿藏成矿有利地段;(3)认为华夏、江南两古陆是由裂谷发展所引起的:裂谷制约了区内花岗岩及火成岩的分布;(4)提出物性纵向分层和横向分带的尝试。结果得出磁性层的深度分布,分出磁性层薄变带和厚变带,在横向上将该区划分出五个“不稳定带”,进一步推断它们与成矿的关系。
The study area ranges from latitude 24 ° to 32 ° north latitude and longitude 108 ° to 126 ° east with the Yangtze Platform as the main body (the eastern section of the Yangtze Platform), which contains the South China Slot System (southeast part), the eastern section of the Qinqi System North China Taiwan South Field part. Through comprehensive analysis and processing of geophysical data in the study area, the major geological tectonic events in the study area are explained, mainly as follows: (1) Large-scale lithospheric rifts and fault structures occurred in the geological history period There are a large number of igneous rocks (especially granites) distributed widely and diversified. (2) There are multi-block interaction stretching and compressing sections with strong rifting activity in this area. In such a region, it is an ideal place for the exchange of matter in the crust and the mantle and provides advantageous space conditions for the migration and occurrence of ore-forming materials. It is a favorable area for mineralization of various types of mineral deposits. (3) Is caused by the development of rifts: the rift restricts the distribution of granite and igneous rocks in the area; (4) the attempt of longitudinal stratification and lateral zonation is proposed. The results show that the depth distribution of the magnetic layer, the magnetic thin layer and thickness of the variable zone, in the horizontal area will be divided into five “unstable zone”, and further infer their relationship with metallogeny.