遥感技术在阿尔金贝壳滩地区矿产资源综合调查中的应用

Application of remote sensing in integrated survey on mineral exploration in Beketan,Altyn

阿尔金成矿带具有较大的金、铜、铅、锌等矿种找矿潜力,但因其自然环境恶劣,常规地质手段较难顺利开展野外调查工作。中国地质调查局"阿尔金成矿带矿产资源遥感综合调查"项目,以遥感技术为手段,综合利用高空间分辨率、多(高)光谱分辨率遥感数据,制作了高分辨率遥感影像图;完成了不同尺度地层-构造遥感解译;开展了Fe^(3+)、Al—OH、Mg—OH和CO_3^(2-)等蚀变异常信息的提取与筛选;基于野外调查验证和典型矿床研究,实现了遥感找矿预测,在阿尔金贝壳滩地区的恰什坎·萨依河中游及下游发现2处构造蚀变岩型金矿化线索;总结了该地区构造蚀变岩型金矿的成矿机理,指明了该类矿床的有利找矿方向。

Altyn area is a potential area of exploration for gold,copper,lead,zinc and other minerals. However,conventional geological survey is difficult in this area,because the natural environment is harsh. In the 'remote sensing integrated survey on mineral exploration in Altyn Metallogenic Belt 'project,high spatial resolution and multi( high) spectral resolution remote sensing data are used to make high resolution remote sensing image map.And abnormal information about Fe^(3 +),Al—OH,Mg—OH and CO_3^(2-),has been extracted and selected. Also remote sensing interpretations of lithology and structure have been completed in different scales. Based on field investigation and typical deposit research,remote sensing is applied to ore prediction,and two structural altered gold mineralization clues are found in Beketan,Altyn. In this paper,the mineralization mechanism of structural altered gold deposit has been summarized,and prospecting direction in this area has been pointed out.