基于SPOT数据的铁化蚀变信息提取及找矿应用研究——以陇南金矿区为例  

The Extraction and Analysis of Iron Alteration Information Based on SPOT Data for Mineral Prediction:A Case Study of the Longnan Gold Ore District

作　　者：李智峰[1] 朱谷昌[1,2] 张建国[2] 刘欢[1] 胡杏花[1] 

机构地区：[1]中南大学地学与环境工程学院,长沙410083 [2]有色金属矿产地质调查中心,北京100012

出　　处：《国土资源遥感》2011年第2期91-97,共7页Remote Sensing for Land & Resources

基　　金：中国地质调查局地质调查项目(编号:121201916062)

摘　　要：针对遥感方法找矿预测问题,以甘肃陇南金矿区为例,对基于SPOT数据的铁化蚀变信息提取及其在找矿预测中的应用进行了研究。在分析研究区的地质背景资料及其围岩蚀变类型的基础上,利用SPOT 5卫星遥感数据,经过多种图像处理,提取了与金矿密切相关的铁化蚀变异常信息,探索了利用中高分辨率卫星SPOT数据提取遥感蚀变异常信息的可行性。研究表明,相对于ETM、ASTER等数据,虽然SPOT不具有更宽的光谱范围和更高的光谱分辨率,但是针对特定区域的特定任务,SPOT数据仍然能够发挥应有的作用。Taking the Longnan gold ore district in Gansu Province as the study area, this paper carried out the study of extracting iron alteration information from satellite-based remote sensing images from SPOT data. Based on analyzing the geological background and rock alteration types, the authors used SPOT 5 satellite remote sensing images and, by utilizing a variety of image processing methods, extracted the iron alteration information closely relat, I to gold mineralization and explored the feasibility of extracting alteration information from moderate and high resolution satellite data. The results show that, in comparison with ETM, ASTER and other satellite data, SPOT does not have a broader spectral range and higher spectral resolution, but can play an effective role in carrying out some specific tasks in particular area.

关 键 词：中高分辨率 SPOT 5 金矿区 铁化蚀变 信息提取 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置] TP79[自动化与计算机技术—控制科学与工程]