摘要
新疆西天山博罗科努成矿带交通状况较差,工作条件艰苦,制约了找矿突破,而运用高光谱遥感技术可以更方便、准确地提取地区岩矿信息。本文获取了研究区Hyperion高光谱遥感影像,完成波段筛选、坏线去除、Smile纠正、绝对辐射值转换、大气校正等预处理工作。通过纯净像元指数法和N维散度分析提取影像端元,运用波谱角填图法和波谱特征拟合法,对高光谱数据提取了研究区的蚀变矿物,完成了黄铁矿、黄钾铁矾、绿泥石、绿帘石、闪锌矿和蒙脱石等主要矿物的填图,并结合区域地质资料与成矿条件,对提取的蚀变信息进行了分析与验证,发现提取的蚀变信息较为准确可靠。该方法对新疆西天山地区遥感提取蚀变信息具有很大的意义。
The poor traffic condition and tough working condition restrict the prospecting in Boluokenu metallogenic belt of the West Tianshan, Xinjiang. Using Hyper-spectral technology can extract the information of regional rock and mineral, conveniently and accurately. Hyperion hyper-spectral data of study area was obtained. Taking Preprocessing of data of remote sensing, make the data more precise, which includes band selection, bad lines removal, Smile effect correction, conversion of absolute radiation and atmospheric correction. The image pixels are extracted by the methods of pure pixel index and N dimension analysis. Based on the spectral characteristics of altered rocks, the altered minerals are extracted from hyper-spectral data by using methods of spectral angle match and spectral feature fitting. Main minerals, such as pyrite, jarosite, chlorite, epidote, sphalerite and sauconite, mapping has been completed. Combined with regional geological data and metallogenic conditions, the result of the extraction of altered information has been analyzed and verified. It is pointed out that the altered information extracted is precise and reliable. This method has a difference to extract the alteration information from remote sensing in western Tianshan area, Xinjiang.
作者
曹若臣
荆林海
向中林
谢洪波
CAO Ruochen;JING Linhai;XIANG Zhonglin;XIE Hongbo(School of Resource and Environment,Henan Polytechnic University,Jiaozuo 454000,China;Key Laboratory of Digital Earth,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China)
出处
《测绘与空间地理信息》
2018年第9期75-78,81,共5页
Geomatics & Spatial Information Technology
基金
中央返还两权价款资金综合研究项目(Y15-1-LQ04)
中科院遥感地球所"科创计划"项目(1188000007)资助
