热红外高光谱遥感回归分析定量反演石英含量
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摘要
热液矿床是重要的矿床类型,包含金矿、铜矿、锡矿、铀矿、钨矿、铅锌矿等重要矿床。在多数情况下,热液活动造成其与围岩石英含量的差异。目前遥感技术仅能提取SiO_2含量(或相对含量)及其分布范围,难以精确反映石英含量的差异信息。通过分析JHU波谱库中不同矿物的光谱曲线以及其他多种含石英岩石和不含石英岩石的光谱曲线,区分了SiO_2光谱特征谱段和石英光谱特征谱段。使用热红外地面光谱仪102f实测样品光谱,通过线性回归方程统计出石英含量的计算公式。最后,通过热红外成像光谱仪(thermal airborne hyperspectral imager,TASI)提取研究区石英含量来验证公式的正确性,并得到野外验证。得出结果:8.6μm处的发射峰是8~11.5μm范围内石英唯一明显的光谱特征,其发射峰的凸显程度与石英含量呈正相关关系。
Hydrothermal deposit is an important type of deposits,and the minerals include gold,copper,tin,uranium,tungsten,lead and zinc and other important deposits. In most cases,hydrothermal activity results in difference quartz content between the local and the surrounding rock. At present,remote sensing technology can only extract SiO_2 content( or relative content) or its distribution range,and it is difficult to accurately reflect the information of different quartz content. By analyzing the spectral curves of different minerals in the JHU spectra library and the other spectral curves of quartz rock and quartz-free rocks,the characteristic spectrum of quartz was distinguished from that of SiO_2. The spectrum of the sample was measured by the thermal infrared spectrometer102 f,and the calculation formula of the quartz content was calculated by the linear regression equation. Finally,the correctness of the formula was verified by the quartz content of the study area extracted by TASI data and it was verified by field work. The result shows that the emission peak at 8. 6 μm is the only obvious spectral characteristic of quartz in the spectrum range of 8 ~ 11. 5 μm,and its emission peak has a positive correlation with the quartz content.
Hydrothermal deposit is an important type of deposits,and the minerals include gold,copper,tin,uranium,tungsten,lead and zinc and other important deposits. In most cases,hydrothermal activity results in difference quartz content between the local and the surrounding rock. At present,remote sensing technology can only extract SiO_2 content( or relative content) or its distribution range,and it is difficult to accurately reflect the information of different quartz content. By analyzing the spectral curves of different minerals in the JHU spectra library and the other spectral curves of quartz rock and quartz-free rocks,the characteristic spectrum of quartz was distinguished from that of SiO_2. The spectrum of the sample was measured by the thermal infrared spectrometer102 f,and the calculation formula of the quartz content was calculated by the linear regression equation. Finally,the correctness of the formula was verified by the quartz content of the study area extracted by TASI data and it was verified by field work. The result shows that the emission peak at 8. 6 μm is the only obvious spectral characteristic of quartz in the spectrum range of 8 ~ 11. 5 μm,and its emission peak has a positive correlation with the quartz content.
引文
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11杨杭,张立福,黄照强,等.基于热红外发射光谱的岩石Si O2定量反演模型研究.光谱学与光谱分析,2012;32(6):1611-1615Yang Hang,Zhang Lifu,Huang Zhaoqiang,et al.Quantitative inversion of rock Si O2content based on thermal emissivity spectrum.Spectroscopy and Spectral Analysis,2012;32(6):1611-1615
12刘道飞,陈圣波,陈磊,等.以Si O2含量为辅助因子的ASTER热红外遥感硅化信息提取.地球科学---中国地质大学学报,2015;40(8):1396-1402Liu Daofei,Chen Shengbo,Chen Lei,et al.Silicification information extraction based on the content of Si O2from ASTER TIR data.Earth Science-Journal of China University of Geosciences,2015;40(8):1396-1402
13郭帮杰,张杰林,武鼎,等.高光谱遥感在硅化带识别中的应用.科学技术与工程,2017;17(3):154-158Guo Bangjie,Zhang Jielin,Wu Ding,et al.Application of hyperspectral remote sensing in silicified zone identification.Science Technology and Engineering,2017;17(3):154-158
14郭帮杰.准噶尔盆地东缘铀及多金属勘查高光谱遥感应用研究.北京:核工业北京地质研究院,2016Guo Bangjie.Application of hyperspectral remote sensing in uranium and polymetallic exploration in the eastern margin of Junggar Basin.Beijing:Beijing Research Institute of Uranium Geology,2016
2 Yamaguchi Y,Kahle A B,Tsu H,et al.Overview of advanced spaceborne thermal infrared thermal emission and reflection radiometer(ASTER).IEEE Transactions on Geoscience and Remote Sensing,1988;36:1062-1071
3 Ninomiya Y,Fu B J.Extracting lithologic information from ASTERmultispectral thermal infrared data in the northeastern Pamirs.Xinjiang Geology,2003;21(1):22-30
4 Bastero C F,Lagmay A M F A.Estimating Si O2content of lava deposits in the humid tropics using remotely sensed imagery.Journal of Volcanology and Geothermal Research,2006;151:357-364
5 Guo B J,Zhang J L.Airborne hyperspectral remote sensing technology for polymetallic ore and uranium deposits exploration in east Junggar.Acta Geolagica Sinica(Engish Edition),2014;88(S2):1347-1348
6 Guo B J,Zhang J L,Wu Ding,et al.Application of airborne hyperspectral remote sensing in exploration for Sn ore in A-type granite.The Preceedings of 4th International Conference on Energy and Environmental Protection.Lancaster:DEStech Publications,Inc.,2015:2618-2622
7闫柏琨.热红外遥感岩矿波谱机理及信息提取技术方法研究.北京:中国地质大学(北京),2006Yan Bokun.Study on mechanism of spectrums of rocks and minerals and information extraction method in thermal remote sensing geology.Beijing:China University of Geosciences(Beijing),2006
8陈江,王安建.利用ASTER热红外遥感数据开展岩石化学成分填图的初步研究.遥感学报,2007;11(4):601-608Chen Jiang,Wang Anjian.The pilot study on petro chemistry components mapping with ASTER thermal infrared remote sensing data.Journal of Remote Sensing,2007;11(4):601-608
9杨长保,朱群,姜琦刚,等.热红外遥感地表岩石的二氧化硅含量定量反演.地质与勘探,2009;45(6):691-696Yang Changbao,Zhu Qun,Jiang Qigang,et al.Silicon dioxide content of surface rock quantify inversion and retrieval by thermal infrared ASTER data.Geology and Exploration,2009;45(6):692-696
10杨波,吴德文,赖健清,等.矿化信息提取定量遥感模型的建立---以鹰嘴山硅化蚀变为例.遥感学报,2005;9(6):717-724Yang Bo,Wu Dewen,Lai Jianqing,et al.A mixed alteration remote sensing model for extracting mineralization information:A case study of the Yingzuishan gold deposit.Journal of Remote Sensing,2005;9(6):717-724
11杨杭,张立福,黄照强,等.基于热红外发射光谱的岩石Si O2定量反演模型研究.光谱学与光谱分析,2012;32(6):1611-1615Yang Hang,Zhang Lifu,Huang Zhaoqiang,et al.Quantitative inversion of rock Si O2content based on thermal emissivity spectrum.Spectroscopy and Spectral Analysis,2012;32(6):1611-1615
12刘道飞,陈圣波,陈磊,等.以Si O2含量为辅助因子的ASTER热红外遥感硅化信息提取.地球科学---中国地质大学学报,2015;40(8):1396-1402Liu Daofei,Chen Shengbo,Chen Lei,et al.Silicification information extraction based on the content of Si O2from ASTER TIR data.Earth Science-Journal of China University of Geosciences,2015;40(8):1396-1402
13郭帮杰,张杰林,武鼎,等.高光谱遥感在硅化带识别中的应用.科学技术与工程,2017;17(3):154-158Guo Bangjie,Zhang Jielin,Wu Ding,et al.Application of hyperspectral remote sensing in silicified zone identification.Science Technology and Engineering,2017;17(3):154-158
14郭帮杰.准噶尔盆地东缘铀及多金属勘查高光谱遥感应用研究.北京:核工业北京地质研究院,2016Guo Bangjie.Application of hyperspectral remote sensing in uranium and polymetallic exploration in the eastern margin of Junggar Basin.Beijing:Beijing Research Institute of Uranium Geology,2016