遥感蚀变异常非线性分析方法——以北山新、老金厂为例  

Nonlinear analysis method for remote sensing alteration anomalies:A case study of Xinjinchang and Laojinchang in Beishan

作　　者：韩海辉[1,2] 王艺霖[1] 任广利[1] 杨军录[1] 李健强[1] 杨敏[1] 

机构地区：[1]中国地质调查局西安地质调查中心,西安710054 [2]长安大学地质工程与测绘学院,西安710054

出　　处：《国土资源遥感》2017年第1期43-49,共7页Remote Sensing for Land & Resources

基　　金：中国地质调查局地质调查项目"东昆仑成矿带木孜塔格铅锌铜金多金属矿调查评价区地质矿产调查"(编号:DD2016002);中国地质调查局地质调查项目"航空高光谱遥感调查"(编号:12120113073200);中国地质调查局地质调查项目"青海省柴达木北缘地质矿产调查"(编号:12120113032500);"十二五"国家科技支撑计划项目"岔路口-神仙湾铅锌成矿带成矿地质背景及靶区优选"(编号:2015BAB05B03-01);国家自然科学基金项目"绿泥石矿物近红外光谱吸收谱带的位移机理与控制机制研究"(编号:41502312)共同资助

摘　　要：以北山新、老金厂为实验区,利用ASTER遥感数据,通过分形模型与变点分析模型,定量化计算蚀变异常下限值,探索非线性分析方法计算遥感异常下限值的有效性。结果表明:对于遥感蚀变异常具有分形分布特征的地区,采用变点分析法可快速计算出地质背景与蚀变异常下限值,且结果具有较高的拟合度;通过野外验证,提取的蚀变异常信息与已知矿体以及地面蚀变地质体的光谱测量结果吻合较好;因此,该方法可作为定量计算遥感蚀变异常阈值的可选方法,这也为今后定量化研究遥感蚀变异常提供了新思路。The purpose of this study is to explore a new effective method to conduct quantified calculation of the lower threshold. Based on ASTER image, the authors used the fractal model and the change -point analysis model in study areas named Xinjinchang and Laojinchang. The experimental results show that the model could quickly calculate the lower threshold for the alteration anomaly with fractal characteristics, and the model verification results also show that the threshold values are accurate and effective. In addition, field geological survey also indicates that the alteration anomalies delineated by the authors are well in accord with the known orebodies and the spectra of the alteration geological bodies. The authors thus hold that the nonlinear analysis method is a reliable means for extracting alternation anomalies and is also useful for mineral exploitation.

关 键 词：非线性 分形 变点分析 遥感蚀变异常 新、老金厂 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]