塔里木盆地居里等温面特征及其地质意义

The characteristic and geological meaning of Curie isothermic surface under the Tarim basin

本文讨论了用磁场矩谱法及改进的Parker－Oldenburg方法计算磁性体下界面埋深的具体步骤。利用矩谱法的计算结果作为Parker－Oldenburg方法的约束模型，计算了塔里木盆地居里等温面（磁性下界面）深度。其特征为居里点等深线梯度所反映的深断裂将盆地深部分隔为2个居里面隆起区（带）和3个凹陷区（带），这些隆起区或凹陷区都同盖层区域构造有同像或反像关系。

Authors describe the procedure of estimating the underneath depth of a magnetic body by using both magnetic field moment spectrum method and improved Parker-Oldenburg method. The depth of Curie isothermic surface (underneath depth of magnetic body) under the Tarim basin is obtained by taking the result of moment spectrum method as a restrictive model of Parker-Oldenburg method. As a result, deep faults reflected by gradient of Curie depth contour divide the deep part of the basin into two areas where Curie surface uplifts and other three areas under which Curie surface subsides. Relatively to the tectonics in above overburden,there exist homomorphous and anti-homomorphous tectonic structures in the uplifted areas and subsidence areas respectively.