江西铜多金属矿集区的遥感解译及其找矿意义

On remote sensing interpretation and prospecting significance of copper polymetallic mineral concentrated areas in Jiangxi

遥感影像是地表综合自然景观电磁波辐射特征的图像显示,是地质体在地表的直接反映。遥感解译"五要素"所反映的地质信息真实直观,这些信息在地质找矿工作中,具有指导意义。运用江西铜多金属主要矿集区ETM+/TM遥感数据影像进行地质异常解译,如隐伏岩体、火山机构、控矿构造、环形构造、特殊地层以及热变质晕、蚀变晕等。解译结果发现:多组线性构造交汇部位,或线性构造密集部位,是岩体-矿床产出的有利地段,而规模较大的隐伏斑岩体,在影像图上往往显示环形特征,特别是出现子母环或套叠环(环中环或同心环)时,寻找铜多金属矿床意义更大。

Remote sensing image was the image display of electromagnetic radiation characteristics for the comprehensive natural landscape on the earth＇s surface and the direct reflection of geological bodies on the earth＇s surface. The five elements of the remote sensing reflected real and direct geological information that was of guiding significance in geological mineral prospecting. By using remote sensing image data of ETM ^＋/TM in the copper polymetallic concentrated areas, the authors conducted the interpretation of geological anomalies like hidden rock mass, volcanic mechanism, ore-controlling structure, ring structure, special stratum and thermal metamorphic halo and aheration halo and so on. The results showed there occurred hidden porphyry in large scale in the favorable sections of the rocks and deposits at the intersected portions multi-sets of linear structures or the concentrated portions of linear structures and displayed ring properties on the image and were of ore prospecting significance.