| 利用TM数据快速提取含矿蚀变带方法研究 |
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| 引用本文： | 马建文.利用TM数据快速提取含矿蚀变带方法研究[J].遥感学报,1997,1(3):208-213,224. |
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| 作者姓名： | 马建文 |
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| 作者单位： | 冶金工业部天津地质研究院,天津 300061 |
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| 基金项目： | 中国、加拿大人才开发项目(WUSC);国家人事部归国留学人员基金 |
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| 摘 要： | 热液蚀变岩类是在含矿热液作用下引起原岩化学成分和物理性质发生变化的结果，因此蚀变岩类往往与内生产矿产伴生，有时其本身就是含矿体。不同蚀变矿特级组合具有独特的光谱响应，但是光谱的反射和吸收产特征较弱称为遥感找矿弱信息标志。
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| 关 键 词： | 地质遥感 含矿蚀变带 TM数据 图像掩膜 |
Methodology Study of Quickly Identifying Mineral Bearing Alterations from TM Data |
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| Ma Jianwen.Methodology Study of Quickly Identifying Mineral Bearing Alterations from TM Data[J].Journal of Remote Sensing,1997,1(3):208-213,224. |
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| Authors: | Ma Jianwen |
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| Institution: | Tianjin Geological Academy, The Ministry of Metallurgical Industry |
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| Abstract: | Abstract TM imagery uses 0-255 grey levels to represent different spectrum of the ground truth. In the
ease of using TM data to enhance and map mineral bearing alterations, Amos (1989) and Zhao
Yuanhong (1991) applied TM ratio+PCA to enhance alterations with eliminating the influencial factor of
vegetation; Crosta (1991) and Ioughlin (1991) used PCA+negative+PCA to successfully identify
alterations.However, those methods have unsatisfactory results in the areas where dominanted with
forestry,grass,glacial ice,loess, water bodies, and clouds. The new methodology to eliminate those.
environment factors which have strong spectral reflectance comparing with relative weak spectral
reflectance of alterations,and which have impact on spectral signatures of the TM data in terms of
differentiating alterations from surrounding rocks is developed mainly by TM data masking-PCA-supervised
and unsupervised classification in the testing areas selected both in Canada and China. The results are
proved vary effective. |
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| Keywords: | Alterations Image masking Supervized and unsupervized classification |
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