Study On Compositive Prediction By Remote Sensing For Saishitang Cooper Polymetallic Metallogenic Belt, Qinghai Province

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.