青藏高原亚东—格尔木地学断面重磁异常的对应分析

QUANTITATIVE CORRELATION ANALYSIS OF GRAVITYAND MAGNETIC ANOMALIES ON THE GEOSCIENCE TRANSECTFROM YADONG TO GOLMUD, QINGHAI-TIBET PLATEAU

对应分析方法是一种重磁异常的定量化联合解释方法。从泊松定理出发,计算重磁异常的相关性,并根据相关性的分布特征来分离和鉴别不同类型的异常区,为划分地质构造单元及认识地壳结构的其它特征提供信息。在对青藏高原亚东—格尔木地学断面的综合研究中,本文用对应分析方法联合解释重磁异常,对该区地壳结构提出了一些认识。

quantitative correlation analysis is one of the integral interpretation methods of gravity and magnetic anomalies. Based on Poisson's theorem, a moving - window linear regression analysis is preformed between suitable derivatives of anomalous potential fields. Then, areas with different pat-terns of anomaly correlation can be distinguished between each other, and useful information about terrane boundary and crust structure can be derived. From the results of this method, we gain some new idea about the crust structure on the geoscience transect from Yadong to Golmud, Qinghai-Ti-bet plateau.