地震工程学报2025，Vol.47Issue(3)：709-715,740,8.DOI:10.20000/j.1000-0844.20240127001
首都圈地区航磁异常与断裂构造关系
Relationship between aeromagnetic anomalies and fault structures in the capital area of China
摘要
Abstract
The capital area of China,located at a tectonic transition zone between the Yanshan uplift and the North China Plain,is characterized by complex structural settings.Using large-scale aeromagnetic anomaly data,horizontal and vertical first-order derivations at 0°,45°,90°,and 135° directions were calculated.Then,the fault structure was interpreted in detail,and a to-tal of 39 NE-and NW-trending faults were identified in the capital area.The original aeromagnet-ic anomaly field shows disorganized high-amplitude anomalies in the Yanshan uplift in the north of the study area,indicating a multistage tectonic movement.High-gradient anomaly belts derived from the directional derivative map exhibit strong consistency with fault strikes.NE-and NW-trending faults in the Beijing depression display distinct linear features.Because of the nega-tive anomaly traps in the Beijing depression,these faults can be considered"dry faults"with magmatic activity.Vertical derivatives highlight prominent high-anomaly gradient zones along the boundary of the Daxing uplift,Western Beijing uplift,and Beijing depression.关键词
首都圈地区/航磁异常/方向导数/断裂解译/地壳构造Key words
the capital area of China/aeromagnetic anomaly/directional derivatives/fault inter-pretation/crustal structure分类
天文与地球科学引用本文复制引用
徐峰,王鑫,樊继迪..首都圈地区航磁异常与断裂构造关系[J].地震工程学报,2025,47(3):709-715,740,8.基金项目
地球深部探测与矿产资源勘查国家科技重大专项课题(2024ZD1000707) （2024ZD1000707）
北京市自然科学基金项目(8184090) （8184090）
