新疆阿尔金成矿带祥云金矿床地质—高光谱遥感综合找矿标志及应用

选择新疆阿尔金成矿带的祥云金矿床,采用地面和航空高光谱遥感数据,进行高光谱蚀变矿物识别和提取,结合矿床地质特征,提出了基于典型矿床的地质—高光谱遥感找矿标志建立思路,即地质方面主要针对大地构造位置、赋矿地层和岩性、控矿和赋矿构造、含矿岩体、矿区和近矿围岩蚀变等方面,地面高光谱主要针对矿区、矿体、矿化体、矿化蚀变带、近矿围岩、正常围岩的蚀变矿物分布等方面,航空高光谱遥感主要针对高光谱遥感影像、近矿和外围地段高光谱蚀变矿物等方面开展矿床地质、地面高光谱和航空高光谱遥感找矿标志综合剖析。运用金矿床地质—高光谱遥感综合找矿标志,圈定了金及多金属找矿靶区,开展找矿应用,新发现了多条金铜矿化蚀变带,取得了较好的找矿效果。此研究和工作思路表明:地质与高光谱遥感相结合,能为找矿提供准确且可靠的找矿标志信息。

Geological and hyperspectral remote sensing integrated ore-prospecting criteria and application of Xiangyun gold deposit in Aerjin metallogenic belt, Xinjiang

Taking a case study in Xiangyun gold deposit located in Aerjin metallogenic belt, recognition and extraction for hyperspectral altered minerals were conducted by using the ground and airborne hyperspectral remote sensing data. In combinatioin with geological characteristics of the ore deposit , the geology - hyperspectral remote sensing prospecting criteria was proposed and set up. In aspect of geology, it mainly include tectonic location, ore-hosting strata and lithology, ore-bearing and ore-controlling structures, ore-hosting intrusion and wall rock alterations etc.. Ground hyperspectral is primarily for deposit area, ore bodies and mineralized bodies, mineralized alteration zone, distribution of altered minerals nearby orebody and in normal wall rock etc.. The aerial hyperspectral remote sensing is mainly for hyperspectral remote sensing image, hyperspectral altered minerals nearby orebody and peripheral area etc.. to counduct the intergrated interpretation of ore deposit geology, ground and aerial hyperspectral remote sensing prospecting marks. By applying the integrated geology- hyperspectral remote sensing prospecting criteria, gold and polymetallic prospecting targets were outlined, and several gold-copper mineralized alteration zones were newly found, and sounding prospecting effects were achieved. The study result and prospecting clue indicate that the combination of geology and hyperspectral remote sensing data interpretation can provide reliable prospecting information.