高光谱在甘肃红山多金属找矿模型构建中的应用  

Application of hyperspectral spectroscopy to constructing polymetallic prospecting model in Hongshan,Gansu Province

作　　者：王瑞军[1] 张春雷[1] 孙永彬[1] 王诜 董双发[1] 王永军[1] 闫柏琨 WANG Ruijun;ZHANG Chunlei;SUN Yongbin;WANG Shen;DONG Shuangfa;WANG Yongjun;YAN Bokun(Airborne Survey and Remote Sensing Center of Nuclear Industy, Shijiazhuang 050002, China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China)

机构地区：[1]核工业航测遥感中心,石家庄050002 [2]中国自然资源航空物探遥感中心,北京100083

出　　处：《国土资源遥感》2020年第3期222-231,共10页Remote Sensing for Land & Resources

基　　金：中国地质调查局地质调查项目“天山—北山重要成矿区带遥感调查”(编号:121201003000150008)资助。

摘　　要：为深入研究和探讨高光谱遥感技术在地质找矿中的应用效果和潜力,利用甘肃红山地区的航空和地面高光谱遥感数据,剖析蚀变矿物或蚀变异常信息的分布特征,总结成矿地质体的蚀变异常展布规律,提出基于已知典型矿床的蚀变信息特征成矿、控矿要素和基于成矿地质体蚀变信息规律的成矿地质环境要素找矿定位模型构建思路,逐步揭示“矿物—标志性矿物—蚀变矿物—找矿异常”所表达的成矿地质环境,构建典型矿床找矿定位模型和蚀变矿物与地质背景综合找矿定位模型。以找矿定位模型为指导,结合红山地区地质背景和成矿规律,开展不同模型找矿应用,圈定多金属找矿预测区4处;经野外查证,发现较好的多金属矿化线索。实践表明,通过剖析高光谱蚀变信息和成矿规律的内在联系,能为找矿提供较为准确的信息,也可为同类多金属的找矿工作提供有效参考。In order to further study and explore the application effect and potential of hyperspectral remote sensing technology in geological prospecting,the authors used the aerial and ground hyperspectral remote sensing data of Hongshan region in Gansu Province to analyze the distribution characteristics of altered minerals or altered anomaly information,summarized the distribution law of altered anomaly of ore-forming geological bodies,and proposed the construction idea of ore-finding positioning model of ore-forming geological environment elements based on alteration information characteristics of known typical deposits,ore-controlling elements and alteration information law of ore-forming geological bodies.The authors gradually revealed the metallogenic geological environment expressed by“minerals-landmark minerals-altered minerals-prospecting anomalies”,and constructed the prospecting positioning model of typical deposits and the comprehensive prospecting positioning model of altered minerals and geological background.Guided by the ore-finding positioning model and combined with geological background and ore-forming laws,the authors applied different models to delineate 4 polymetallic prospective areas.After field investigation,better clues of polymetallic mineralization were found.Practice shows that,by analyzing the intrinsic relationship between hyperspectral alteration information and ore-forming laws,more accurate information can be provided for ore prospecting,and the same kind of polymetallic ore prospecting work can be effectively guided.

关 键 词：高光谱遥感 蚀变矿物组合 找矿定位模型 找矿分析 甘肃红山 

分 类 号：P612[天文地球—矿床学] TP79[天文地球—地质学]