遥感异常提取的机理研究与成控矿相关性分析——以青海祁漫塔格成矿带为例

Study on the mechanism of remote sensing anomaly extraction and correlation analysis of ore controlling:Take the Qimantag metallogenic belt of Qinghai as an example

基于遥感影像的蚀变信息提取与矿床自身的成控矿因素研究一直处于比较孤立的两个方面,遥感异常提取与矿床交代蚀变之间的关系也尚未在理论上有过系统探讨。通过梳理青海祁漫塔格成矿带内发现的矿化线索和蚀变矿物种类,分析蚀变矿物波谱诊断特征与多源遥感数据波段的对应关系,厘清了研究区内主要蚀变矿物、矿床成因类型、矿床类型、遥感数据选择之间的联系;基于该研究区遥感数据建立了交代蚀变提取的地学和物理模型;在遥感异常信息展布特征与矿床类型、地层、构造和岩性的分析基础上圈定了遥感异常包,完善了遥感异常信息与成控矿相关性分析方法。本研究对于区域二维成矿预测具有重要意义。

Information extraction from remote sensing and the research of ore controlling factors has been in the two aspects isolated corrosion,the relationship between remote sensing anomaly extraction and deposit metasomatic alteration in the theory system has not yet been discussed. Combing the mineralization clues and altered minerals has discovered of Qimantag metallogenic belt according to the geological background of the work area,the paper has established the relationship of main alteration mineral-deposit genetic type-deposit type-type of remote sensing data and the geological and physical model through analyzing the relationship between the corresponding alteration characteristics of multi-source remote sensing data and spectral diagnosis mineral band. The combination analysis of remote sensing alteration information distribution and ore controlling factors of study areas,such as basic deposit types,stratigraphic and structural improved the correlation analysis method of remote sensing anomaly information and ore controlling ore and delineated the remote sensing anomaly packet,it has important significance for the 2D regional metallogenic prediction.