【作者】 刘海利；

【导师】 朱谷昌； 杨自安；

【作者基本信息】 中南大学 ， 地图学与地理信息系统， 2010， 硕士

【摘要】 赛什塘成矿带蕴含有丰富的矿产资源,由于该区位于西部高寒山区,自然条件恶劣,传统地质方法很难在短期内取得良好的效果。遥感技术以其自身的优势可以在该区成矿预测中发挥作用,为解决该区资源储备问题提供丰富的找矿信息。本文选择赛什塘成矿带为研究区,利用ETM遥感影像,结合已有的地学资料,进行遥感地质解译、蚀变信息提取和综合成矿预测研究,取得了如下成果：(1)首次在研究区内应用遥感技术进行找矿研究,并把遥感信息融入综合成矿预测研究中,获取了大量的遥感信息,填补了该区遥感研究的空白。(2)根据研究区地质矿产资料,结合野外调查结果以及常见岩性地层的影像特征,建立了研究区地层岩性的遥感解译标志,然后对遥感影像进行了地质解译工作,为研究区开展地质构造研究工作提供了良好的遥感地质资料。(3)通过ETM影像特征值分析,结合研究区已知矿化类型与铁化蚀变异常的关系,采用比值法对研究区遥感影像进行铁化蚀变信息提取,获取了大量的铁化蚀变信息。(4)对研究区多种地学信息综合处理,分析蚀变信息与其它地学信息的关系,可见蚀变信息多出现在断裂构造的交汇部位；同时蚀变异常不但与已知矿床相对应,而且在成矿带外围也有分布,为研究区内下一步的地质找矿工作提供了重要的找矿信息。(5)在综合分析研究区的地质矿产资料的基础上,对研究区区域成矿模式、成矿条件和矿床成因类型分析研究,结合遥感蚀变信息提取成果,划分出4个成矿预测区,为研究区今后找矿工作提供了方向。更多还原

【Abstract】 Saishitang metallogenic belt contains abundant mineral resources. Because of the the harsh natural environment and inconvenient transportation of the high and cold mountain areas in West China, it is difficult for the tranditional method to achieve good prospecting effect in short time. Reomte sensing technology with its advantages can play an important role in metallogenic prediction. And it wolud give much prospecting information for the shortage of resources reserve in this belt.The article selected Saishitang metallogenic belt as research district; And ETM image was used to study geological interpretation, the extraction methods of mineralized alteration information and the compositive research of metallogenic prediction. The main findings were as follows:(1)The study of prospecting with remote sensing technology was did for the first time in that area.Much remote sensing information was extracted; And the remote sensing information was brought into the compositive research of metallogenic prediction.(2)According to the geological information, the results of field survey, the familiar rock and stratum’s image character in the study district, the remote sensing interpretation key was established; And geological interpretation was accomplished, and it also provided the study of geological structures in that district with nice remote sensing and geological information.(3)With the the analysis of the eigenvalues on the ETM image, the connection of mineralization and abnormal information of iron alteration, the article made use of band ratio method to extract abundant abnormal information of iron alteration.(4)Kinds of geo-information were treated compositively. The relationship between information of iron alteration and other geological information was analysed.The information of iron alteration is always visible in the intersection parts of faults and structures. And they not only had corresponding relationship with the existing deposits but also distributed the around area of the belt. And the article provided the study of further ore-prospecting with very important information.(5)On the basis of the compositive analysis of geological information in that distract, the district mineraling model, metallogenic condition and genetic types of ore deposits in that district were analysed, and four ore-forecast areas were given, with the remote sensing abnormal alteration information extracted.更多还原