磁场信息的提取对构造识别的应用研究

Magnetic field data extraction for applied research on tectonic identification

本文目的是以调查区内磁测资料为基础,利用多种边界识别方法,推测调查区的线性构造特征,并据推测成果,对柴北缘地区的构造演化进行了初步探讨.通过调查区1∶5磁测成果,使用求导、延拓以及求取水平梯度模等数据处理方法,以调查区的地质背景为基础,初步建立调查区的地质—地球物理模型,推测断裂12条,通过地质工作填绘的构造成果,验证了4条断裂的存在情况,并辅助完善了区内喜马拉雅运动第(3)幕构造演化史的建立.因此认为通过磁场信息的提取,能较好的识别出线性构造,并对近期的构造演化起到辅助完善的作用.

The purpose of this article is to base on the magnetic measurement data in the investigation area,using a variety of boundary recognition methods,infer the linear structural features of the investigation area,and according to the conjecture,preliminarily discusse the structural evolution of the northern margin of the Qaidam Basin. The results of 1 ∶ 5 magnetic measurement in the investigation area,using the data processing methods, such as derivation,extension,and horizontal gradient mode,based on the geological background of the investigation area, preliminary establishment of geological-geophysical model in the investigation area,infer 12 fracture,structural results filled through geological work,proving the existence of 4 fracture,and auxiliary establish the third act of the Himalaya movement in the surve. Therefore,it is considered that the extraction of magnetic information from the magnetic field is extracted,the linear structure can be identified well,and it plays an auxiliary and perfect role in the recent tectonic evolution.