摘要
本文通过对汉江流域砂金的卫片解译及地质验证,认为汉江含金砂坝实质是一个多方位线性构造交汇的小型构造盆地,它是在区域似“菱形”骨架及次级北东与北西向构造所控制的第三系盆地发展形成的小盆地,也是汉江中上游三个砂金矿化区的主要控矿条件。MSS7、5、4波段合成图象具有明显区分高低阶地的色调,而砂金伴生有较多的磁铁矿,因此影响反射光谱降低,出现了在低阶地红色基调上偏兰的信息,为圈定含金阶地矿化部位提供标志。
According to satellite photograph and geological verification for the placer gold in basin of Han Jiang river, the gold-bearing sand bank are considered to be a small structure basin, where multiaspect linear structures intersect. It developed from the regional rhombic framework and tertiary basin, which are controlled by NE and NW secondary structures. The basin also is a main condition, controlling three placer gold in middle and upper reaches of Han Jiang river.The composite pictures of MSS 7,5,4 bands have some obvious shades, in which the high or low terraces are recognized. As placer gold associated with more magnetites, the reflect speetrums reduced.
Some bluish colour informations in red base of low terraces appear, being signs for determination of placer gold.
出处
《黄金》
CAS
北大核心
1989年第10期2-5,共4页
Gold
关键词
砂金矿床
控矿
遥感地质分析
satllite photograph interpretation
placer gold structure basin
material information
remote sensing image analysis
