| ASTER遥感数据蚀变遥感异常提取研究 |
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| 引用本文：吕凤军,郝跃生,石静,王娟.2009.ASTER遥感数据蚀变遥感异常提取研究[J].地球学报,30(2):271-276. |
| DOI：10.3975/cagsb.2009.02.17 |
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| 基金项目:河北省国土资源厅项目(编号：2006034)资助 |
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| 中文摘要:基于ETM+/TM数据提取矿化蚀变遥感异常已趋于成熟, 而利用ASTER(先进星载热发射和反射辐射仪)遥感数据提取矿化蚀变遥感异常鲜有报道。本研究利用USGS波谱数据库中典型蚀变矿物反射率数据, 重建其在ASTER数据中波谱曲线研究表明, ASTER遥感数据可以提取Mg-OH、Al-OH、CO32?和Fe3+离子(基团)信息。热液矿床的蚀变围岩通常含有上述4种离子(基团), 它们的波谱特征是蚀变遥感异常提取的理论依据。本研究利用改进“去干扰异常主分量门限技术流程”, 以河北省承德地区和太行山区为例, 上述离子(基团)信息提取结果与野外实际分布相一致, 表明利用ASTER遥感数据提取上述4种离子(基团)信息是可靠的。 |
| 中文关键词:ASTER 遥感数据 蚀变异常 波谱特征 蚀变矿物 |
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| Alteration Remote Sensing Anomaly ExtractionBased on Aster Remote Sensing Data |
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| Abstract:Mineralization alteration remote sensing anomaly has been perfected based on ETM+/TM data, but al-teration remote sensing anomaly extraction achievement is very poor based on ASTER(Advanced Spaceborne Thermal Emission and Reflection Radiometer) remote sensing data. In the study, we have rebulit alteration miner-alization spectral curves on ASTER remote sensing data based on representative alteration minerals reflectivity data in USGS standard spectral database. We think that four types ions information which are Mg-OH, Al-OH, CO32? and Fe3+ can be extracted. In the paper, a practical application example for Chengde area and Taihang-shang area in Hebei province as example, we have used modifying “de-interfered anomalous principal component thresholding technique flow” to extract the four types of ions information. The results of four types of ions infor-mation be extracted are same to the investigation in the field, which shows extracting the four types of ions infor-mation based on the ASTER remote sensing can be accepted. |
| keywords:ASTER remote sensing alteration anomaly spectral characteristic alteration mineralization |
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