由卫星磁异常推断西藏高原地壳的磁性特征

The Magnetic Characteristics of Crust Beneath Xizang (Tibetan) Plateau Deduced from Satellite Magnetic Anomaly

根据前人对本区卫星和航空磁异常所作的研究工作 ,作者经过综合研究所得的结果是 :西藏高原地壳中的磁性层在地表以下 30km以内 ,其磁化率平均为 0 .0 16 7SI ,相当于Ⅰ—型花岗岩类的磁化率 .在 30km以下 。

On the basis of works on Satellite and airborne magnetic anomalies in Tibet accomplished by former researchers, author's synthetical studies show that, the magnetic layer of Tibetan Plateau crust is within 30km beneath the surface with susceptibility about 0.0167 SI on average, corresponding to that of I type granitoid. In crust lower than 30km, it appears nonmagneic.