基于ASTER数据的内蒙古东乌珠穆沁北部地区遥感蚀变信息提取

J4 ›› 2009, Vol. 39 ›› Issue (6): 1163-1167.

基于ASTER数据的内蒙古东乌珠穆沁北部地区遥感蚀变信息提取

杨长保¹|姜琦刚¹|刘万崧¹,邱殿明²

1.吉林大学地球探测科学与技术学院|长春 130026;2.吉林大学学报编辑部| 长春 130026

收稿日期:2008-12-23 出版日期:2009-11-26 发布日期:2009-11-26
作者简介:杨长保(1972-)|男|云南鹤庆人|副教授|博士|主要从事遥感蚀变信息提取|遥感地质解译和农业生态环境应用方面的工作|E-mail:yangcb2008@163.com
基金资助:
科技部科技支撑计划重大专项课题（2006BAB01A03[CD*2]1[CD*2]2）；中国科学院东北地理与农业生态研究所开放基金项目

Hydrothermal Alteration Mapping Using ASTER Data in Northern Dong Ujimqin|Inner Mongolia

YANG Chang-bao¹, JIANG Qi-gang¹, LIU Wan-song¹,QIU Dian-ming²

1.College of GeoExploration Science and Technology, Jilin University, Changchun 130026,China;2.Editorial Departmont, Journal of Jilin University, Changchun 130026,China

Received:2008-12-23 Online:2009-11-26 Published:2009-11-26

摘要/Abstract

摘要：

ASTER数据在短波红外和热红外波段光谱信息明显优于ETM，使得在ASTER波段范围内能够更为详尽地刻画地物波谱，尤其是具有特征谱带的岩石和矿物。选择内蒙古东乌珠穆沁旗北部地区为工作区域，设计了用光谱角制图法提取矿化蚀变信息的技术方案。通过波段组合和增强处理，ASTER数据对含Fe-OH（如黄钾铁矾，含铁白云母）、Al-OH（如粘土类矿物、明矾石、绿泥石、绢云母）和Fe³⁺（如褐铁矿，赤铁矿）3种类型蚀变信息的刻画能力明显比ETM更好。野外查证了提取结果的可靠性。

关键词: 热液蚀变, ASTER, 光谱角制图, 东乌珠穆沁

Abstract:

The availability of spectral information in the shortwave infrared (SWIR) and thermal infrared (TIR) channels of the advanced spaceborne thermal emission and reflection radiometer (ASTER) is much better than that from Landsat ETM. It allows a detailed spectral characterization of land covers, particularly of those rocks and minerals with diagnostic spectra falling into the wavelength range of SWIR and TIR. The authors present a technical approach based on spectral angle mapper (SAM) for hydrothermal alternation information extraction from ASTER images. The method is applied to northern Dong Ujimqin in Inner Mongolia as a case study. The results shows that the ASTER images, through appropriate band combination and image enhancement, are preferable for retrieval of the following three kinds of hydrothermal alteration which contains Fe-OH (jarosite,iron dolomite),Al-OH (clay mineral, alunite, chlorite, sericite) and Fe³⁺(limonite, hematite). Comparatively, ASTER images indicate a greater ability of depictin.

Key words: hydrothermal alteration, advanced spaceborne thermal emission and reflection radiometer (ASTER), spectral angle mapper(SAM), Dong Ujimqin

中图分类号:

TP751

杨长保, 姜琦刚, 刘万崧, 邱殿明. 基于ASTER数据的内蒙古东乌珠穆沁北部地区遥感蚀变信息提取[J]. J4, 2009, 39(6): 1163-1167.

YANG Chang-bao, JIANG Qi-gang, LIU Wan-song, QIU Dian-meng. Hydrothermal Alteration Mapping Using ASTER Data in Northern Dong Ujimqin|Inner Mongolia[J]. J4, 2009, 39(6): 1163-1167.

参考文献

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