高植被覆盖区遥感找锰矿实验研究——以桂西—滇东南的下雷—大新地区为例  

An Experimental Study on Prospecting for Manganese Mineralization by Remote Sensing in the Area Covered with Dense Vegetation——a Case Study in the Daxin—Xialei Area,Western Guangxi—southeastern Yunnan

作　　者：徐丽华[1] 朱恺军[1] 陈鹏[1] 张强[1] 

机构地区：[1]浙江林学院环境科技学院,浙江临安311300

出　　处：《地质论评》2011年第1期133-140,共8页Geological Review

基　　金：国家十一五科技支撑计划项目"桂西-滇东南大型锰矿勘查技术与评价"遥感专题"遥感技术在桂西南-滇东大型锰矿找矿中的应用研究"(编号2451012017)的成果

摘　　要：桂西—滇东南区域植被覆盖茂盛,高覆盖的植被遥感信息相对于地质遥感信息而言是一个很强的干扰。本文以桂西—滇东南的锰矿化信息较为丰富、植被覆盖度高的下雷—大新区域TM遥感影像为例,利用基于主成分变换的铁染遥感异常信息、羟基异常信息和泥岩碳酸岩异常遥感信息提取,以及基于SAM和实地地物光谱测量的基础上提取的氧化锰露头的遥感信息,研究结果与已知锰矿化信息的空间分布区域有较高的吻合度。研究结果表明,本文的研究方法对于遥感找锰矿的宏观靶区框选有较高的参考价值。The area,western Guangxi—southeastern Yunnan,is highly covered by dense vegetation. Generally it is very difficult to detect Manganese information in the area coved with dense vegetation by using RS method.As iron and manganese are paragenesis deposits,gossan anomaly was used to detect the alteration and mineralization by RS and applied to search the manganese. Manganese oxide is the mineral containing water,which is the hydroxyl compound. The rocks of Mn-ore are mudstone,limestone and so on. The manganese alteration of RS anomaly is explored by Principal component analysis （PCA） method. Gossan anomaly can be enhanced by the fourth component of the PCA result which combined by the bands of TM1,TM4,TM5 and TM7. Hydroxyl anomaly can be enhanced by the fourth component of the PCA result,which combined by the bands of TM1,TM3,TM4 and TM5. If a component with a inversing eigenvaluse matrix with the seventh component,which can be used to enhance the information of mudstone and limestone. Finally,spectral angel mapping （SAM） is used to interprete Mn monoxide based on the RS images. The result is highly consistent to the locations of the confirmed Mn-ore.The outcomes prove that the employed methods in the paper are significant to identify manganese information at highly vegetation covered region.

关 键 词：铁帽异常 羟基化合物 主成分变换 SAM 

分 类 号：P627[天文地球—地质矿产勘探]