新疆比勒提地区断裂构造磁异常信息提取及解释简

比勒提地区位于新疆西南天山，以该区1∶50000高精度磁测数据为基础，采用解析延拓、方向导数等技术手段提取与断裂构造有关的磁异常信息，对区域内构造进行识别，结合标本物性参数统计，对引起磁异常的原因进行分析。对区域磁异常向上延拓及求一阶导数后进行对比，圈定4个特征异常带A1~A4，结合地质资料，识别出4条断裂构造FW1~FW4，FW1和FW2对应喀拉铁克断裂及其次级断裂，FW3为构造动力作用产生的强片理化带，FW4为隐伏断裂，表明高精度磁法测量在本区能有效识别断裂并反映其分布。

The extraction and explanation of magnetic anomalies in Bileti area of Xinjiang

Bileti area is located in southwest Tianshan Mountains. Based on 1:50000 high precision magnetic survey data obtained in this area, the authors extracted the fault structure information from the magnetic anomalies within this area for recognition research by using analytic continuation, directional derivative and other techniques. In combination with physical parameters statistics, the authors analyzed the factors responsible for the formation of magnetic anomalies. The regional magnetic anomalies were comparatively studied by means of upward continuation and first derivative and, as a result, four characteristic anomalies A1~A4 were delineated. Four faults were identified, which were FW1 to FW4, with FW1 and FW2 corresponding to Kalatik fault and its secondary faults, FW3 being strong schistosity zone formed by dynamic action and FW4 being a concealed fault. The results obtained by the authors demonstrate that high precision magnetic survey can effectively recognize faults and reflect their distribution in this area.