大地电磁测深法曲线类型的聚类分析

CLUSTERING ANALYSIS OF CURVE TYPE OF MAGNETOTELLURIC METHOD

在大地电磁测深法中 ,曲线类型的分析划分是资料解释流程中相当重要的一环。实测曲线类型不仅反映了测区地下地质构造的电性特征 ,更重要的是通过曲线类型的划分与分类 ,可定性地掌握测区地质构造单元的格局 ,制定相应的定量解释方法 ,有效地克服地质推断的多解性。作者在本文采用聚类分析的方法对MT曲线进行了分类 ,以求克服目前简单分类法 ,捕抓曲线特征中更深层的一些信息 。

In magnetotelluric sounding method, the analysis and partition of curve types is a very important step in the data processing. The surveying curve types are not also indicate the electric characters of underground geological constitution, and moreover by sorting and clustering, they can also outlined the patterns of the geological constitution unit in the field area. Where the corresponding qualitative interpretation method can be established and the multiplicity of geological concludes effectively be reduced. To overcome the shortage by simple dividing and extracting the deep-seated information in the curve characters, we adopt the method of clustering analysis to divided the curve types of magnetotelluric sounding and finally an application example is given.