甘肃花牛山金矿区热红外高光谱遥感特征分析与找矿预测

Characteristic analysis of thermal infrared hyperspectral remote sensing and prospecting prognosis of Huaniushan gold mining area in Gansu

利用甘肃省花牛山金矿区热红外高光谱遥感数据(CASI/SASI/TASI)提取矿化蚀变矿物进行矿物填图,通过地面热红外高光谱测试验证其准确性,对热红外高光谱遥感矿化蚀变矿物分布规律和组合特征进行分析,结合矿床矿体特征、围岩蚀变特征,建立基于CASI/SASI/TASI数据蚀变矿物分带找矿预测模型。利用该模型在找矿预测区内进行找矿预测,新发现多处金、铜等多金属矿化线索,找矿效果显著,为热红外高光谱遥感蚀变矿物填图技术的推广应用提供了实例。

This paper conducted mineral mapping based on mineralized and alteration minerals extracted from thermal infrared hyperspectral remote sensing data（CASI/SASI/TASI）of Huaniushan gold mining area in Gansu.The results＇ accuracy was verifiedby applying ground thermal infrared hyperspectral test,and the distribution regularities and composition characteristics of mineralized and alteration minerals extracted from thermal infrared hyperspectral remote sensing were also analyzed.Combined with the characteristics of ore bodies and wall rock alteration,aprospection and prediction model of alteration mineral zoning based on CASI/SASI/TASI remote sensing data was established.Favorable results of prospection were obtained by using this model in prospection and prediction in the area,since several clues of polymetallic mineralization of gold and copper were found.The results also served as examples of application and promotion of mineral mapping technique based on thermal infrared hyperspectral remote sensing of alteration minerals.