| 以SiO2含量为辅助因子的ASTER热红外遥感硅化信息提取 |
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| 引用本文： | 刘道飞,陈圣波,陈磊,马明.以SiO2含量为辅助因子的ASTER热红外遥感硅化信息提取[J].地球科学,2015,40(8):1396-1402. |
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| 作者姓名： | 刘道飞 陈圣波 陈磊 马明 |
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| 作者单位： | 1.吉林大学地球探测科学与技术学院, 吉林长春 130026 |
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| 基金项目： | 国家高技术研究发展计划(863计划)项目2012AA12A308中国地质调查局项目1212011220469国家自然科学基金项目41402293 |
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| 摘 要： | 硅化蚀变是岩石矿物蚀变中一种重要的矿化蚀变类型, 与很多金矿的形成有着密切的关系, 且硅化信息常作为野外重要的找矿标志.通过分析硅化蚀变矿物在先进星载热发射和反射辐射仪(advanced spaceborne thermal emission and reflection radiometer, ASTER)热红外波段的光谱特征, 依据硅化作用与SiO2含量间的关系, 选取了SiO2含量作为提取硅化信息的辅助因子, 提出了ASTER热红外遥感硅化信息提取方法.以内蒙古二连浩特市北部地区为例, 完成了该地区硅化信息提取工作.通过野外实地勘察验证, 发现在39个野外实地硅化蚀变采样点中33个采样点在蚀变图像中得到验证, 精度达到86.14%.
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| 关 键 词： | 热红外 先进星载热发射和反射辐射仪 遥感 SiO2 硅化 |
| 收稿时间： | 2015-03-14 |
Silicification Information Extraction Based on the Content of SiO2 from ASTER TIR Data |
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| Abstract: | Silicic alteration, an important alteration type among mineral rock alteration, has close relationship with the formation of several gold mines and it has often been treated as symbol for geological prospecting in the field. This paper proposes a method for the silicification information extraction through analyzing the ASTER (advanced spaceborne thermal emission and reflection radiometer) TIR spectral characteristics of silicification alteration minerals and selecting the content of SiO2 as an accessory factor based on the relationship between silicification and the content of SiO2. The method was applied in northern erlianhot city of Inner Mongolia and the silicification information of study area was extracted. By the field survey, 33 of the 39 silicification sampling sites have been verified, with an accuracy of 86.14%. |
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