青藏高原地区地磁场研究

本文根据１９６５．０年代西藏地区地磁测量资料，选用国际地磁参考场模型和区域地磁场矩谐分析方法，对青藏高原地区地磁异常值进行计算和分析，结果表明该区地磁异常场分布的特征与地质构造，尤其是山脉的展布有密切的联系。山脉及近邻地区地磁异常场，不论是梯度，还是绝对值都明显高于相对增坦的地区。

THE INVESTIGATION OF GEOMAGNETIC FIELD IN QINGHAI XIZANG PLATEAU

In this paper,the geomagnetic anomalies in Qinghai-Xizang Plateau was calculated and analysed on the basis of the measurement data in Qinghai Xizang area in 1965.0 with The Internaitional Geomagnetic Refrence Field(DGRF 1965.0) and the method of the rectangular harmonic analysis,And the results show that the distributions of the geomagnetic anomdly field values are closely related to the geologic structures,in Particular the distributians of the mountain rangs,Both absolute values of the geomagnetic anomalies and their gradients in the mountain ranges and adjacent areas are later than in the relative even areas. This provides the evidence for the India Plate motioning northward and colliding to the Asia-European Plate in the south of Qinghai-Xizang Plateau,and Provides the scientific basis for studying the formatian of Qinghai-Xiyang Plateau and the conneced dynamic problem