新疆阿热勒托别地区遥感化探综合找矿研究  

Synthetic Analyses of Remote Sensing and Geochemical Surveying Data in the Ore Exploration in Areletuobie,Xinjiang

作　　者：刘磊[1,2] 冯成贵 杨丰柱 庄大方[1] 邱冬生[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院研究生院,北京100049 [3]新疆地质矿产局第七地质大队,新疆乌苏833000

出　　处：《现代地质》2009年第3期564-568,共5页Geoscience

基　　金：国家科技支撑计划“生态系统格局与结构变化的遥感监测技术研发”项目(2006BAC08B03)

摘　　要：以新疆阿热勒托别地区为例进行遥感化探综合分析研究。由于新疆阿热勒托别工作区图像上的植被和云严重影响了矿化蚀变信息的特征谱带的识别,使得应用Crosta法提取矿化蚀变信息效果不理想,因此采用掩膜技术剔除植被和云的影响。选择Crosta法对掩膜后图像进行羟基和铁氧化物蚀变信息提取,以μ+1.64σ-μ+2σ、μ+2σ-μ+3σ及>μ+3σ3级阈值分割遥感异常信息,并用不同色彩叠加到遥感与化探融合图像上,结合地质构造信息进行综合分析,圈定成矿有利地段,经野外检查,验证了多处地表岩石蚀变的存在并新发现铜矿点一处,证实了该方法的有效性。The study area is located in Areletuobie, Xinjiang. The redundant vegetation and cloud may seriously interfere with the discrimination of the minerals with diagnostic features. Crosta technique taken to the image of the study area didn＇ t acquire good results. As a result, masking technique was undertaken to eliminate the influence of the vegetation and cloud. Crosta technique was taken to the new images to identify the diagnostic features of the hydroxyl-minerals, carbonate-minerals and the iron oxides. The relevant images, for instance, hydroxyl layer from TM1, 4, 5 and 7, were classified by four thresholds, i. e. 〈μ＋1.64σ-μ＋2σ、μ＋2σ-μ＋3σ and 〉μ＋3σ3. Being treated as remote sensing anomalies the last three groups were en- dued with special colors and overlapped with the false composite images that were combined with geochemical surveying data through data fusion. The ore exploration targets were delineated by synthetic analyses of multi-information. Through field work the existences of several altered outcrops were confirmed and a copper deposit was discovered. The validity of the method has been approved.

关 键 词：Crosta法 掩膜技术 矿物光谱特征 阿热勒托别地区 新疆 

分 类 号：P627[天文地球—地质矿产勘探] TP79[天文地球—地质学]