【作者】 柳晓燕；

【导师】 申维；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2010， 硕士

【摘要】 随着矿产资源供需矛盾的加剧,资源已成为经济发展的瓶颈。因此采用先进的技术,准确而有效地开展成矿预测是现阶段矿产资源勘查急需解决的问题。近年来,航天航空遥感技术的迅速发展将成矿预测提高到了新的阶段。ASTER数据在空间分辨率和光谱分辨率上都比TM、ETM+数据有较大优势。尤其在短波红外光谱区,ASTER数据在粘土化蚀变提取方面拥有TM、ETM+数据无法比拟的能力。围岩蚀变是在成矿作用中经常发生的一种现象,是成矿的重要指示信息。研究区金华山后铜矿普查区围岩蚀变种类多、普遍且强烈,与成矿有关的蚀变主要有黄铁矿化、硅化、绢云母化、绿泥石化、绿帘石化、碳酸盐化等。本文着眼于这一信息,针对ASTER数据,应用主成分分析、比值增强、空间滤波等一系列数据处理方法,完成了金华山后地区蚀变异常提取工作,其中主成分分析是关键技术。4波段组合Band1、Band2、Band3、Band4主成分分析完成铁化蚀变异常提取,Band1、Band3、Band4、Band6主成分分析完成铝羟基蚀变异常提取,Band1、Band 3、Band 4、Band 8主成分分析完成碳酸盐化及部分含镁羟基蚀变异常提取。比值分析在蚀变提取中也起了很大的作用,Band4/Band 3可很好的提取硅化蚀变信息,Band3/Band 2用来增强植被信息。综合研究普查区的矿床地质特征、矿产资料和各级矿化蚀变信息,总结出金华山后地区铜矿普查区具的找矿标志,并划分了六个找矿重点工作区。更多还原

【Abstract】 As the contradiction between supply and demand of mineral resources intensifying,resource has become the central problem of the economic development. So,Using advanced technology,accurately and effectively making metallogenic prediction of mineral resource exploration is the urgent problems.In recent years,the rapid development of aviation remote sensing technology will improve metallogenic prediction to the new stage.ASTER data have bigger superiority than the TM and ETM+data in spatial resolution and spectral resolution.There are some things that ETM+data will not be able to compare to,Especially extracting clay alteration information from ASTER image.The alteration of country rock is a very normal and regular phenomenon occurs during ore forming.It’s very important information of mineralization.Many kinds of alteration is very extensive and intensive in areas.The alteration of country rock related to mineralization includes pyritization,silicification,sericitization, chloritization,epidotization,carbonatization.This paper focus on this information, objective to complete extracting alteration information in ShanHou area of JinHua with ASTER data by using Principal component analysis,Ration enhancement method,Spatial filtering.The Principal component analysis is the key technology. This paper show that band1、2、3、4 is the PC combination for extracting Fe³⁺ alteration information.The PC combination of band 1、3、4、6 can extractAl-OH alteration information to some extent.The PC combination of band 1、3、4、6 can extract Mg-OH,CO₃^2- alteration information to some extent.The Ratio analysis also playing a big role in alteration information extraction,such as band4/band3 can enhance silicated alternation information;band3/band2 can enhance vegetation information.In combination with such data as geology,mineral resources and remote sensing data,prospecting criteria are proposed in this paper,six ore-forming prospect areas are tentatively delineated.更多还原