功率谱法反演青藏高原居里等温面

Invert the curie isotherm of Tibetan Plateau by using of power spectrum method

应用NGDC-720-V3地磁场模型,计算得到青藏高原岩石圈磁异常数据,经过滤波、微分化极后,根据径向平均功率谱反演法得到青藏高原居里等温面深度分布.结果表明,这一地区居里等温面深度在23～42 km.研究还表明,青藏高原居里等温面的深度分布与该区的地质构造和地壳热结构具有一定的对应关系.

We calculated the lithosphere magnetic anomaly of Tibetan Plateau by use of the NGDC-720-V3 model,with these datas,which has filtered and reduced to the pole.After that,we invert the curie isotherm of Tibetan Plateau make use of the power spectrum methord.As a result,the depths of the curie isotherm at this place are estimated at between 23 km and 42 km.Specially,the distribution of the depths of curie in Tibetan Plateau has a relationship with geologicstructure as well as crustal thermal structure.