【摘要】 本文利用科学院地球物理研究所的绝对地磁图（1970，1980）数据，采用球谱分析原理提取区域场，以频谱分析原理计算居理面深度，对西藏雅江大拐弯地区25万Km~2范围的地磁场进行了数据处理。结合该区的地质、地热、地震等方面的资料，综合分析了该区地磁场及磁性基底的变化规律，推断了该区内深大断裂构造线的位置、走向、倾向等。这些结果对了解该区深部地质情况提供了参考信息。更多还原

【Abstract】 :By utilizing data from the absolute geomagnetic charts (197l, 1980) com-piled by Institute of Geophysics,Academia Sinica, the principle of sphericalharmonic analysis was adopted to extract regional field, and the principle offrequency spherical analysis was employed to evaluate the depth of Curie sur-fuce. In this way, data-processing was made for geomagnetic fields in the250, 000 km2 sharply curved area of the Yarlung Zangbo River. In combinationwith the geologic, geothermal and seismic data of this area, the variations ingeomagntic fields and magnetic basement were analysed comprehensively, andthe locations, strikes and dips of the tectonic lines of deep faults in this areadeduced. All these results provide reference information for the knowledge ofgeoiogic conditions at depth of this area.更多还原