【摘要】 岩石的热红外发射率光谱特征与其SiO2含量具有很强的对应关系,本文选择USGS、JPL和JHU光谱库中的52个火成岩光谱样本为数据源,分析了这些样本的SiO2含量与热红外发射率光谱的基本关系,建立起SiO2含量与发射率光谱两个多元线性回归分析模型,在此基础上,以内蒙古东乌珠穆沁北部地区为研究区域,对该区域内SiO2含量进行定量反演,反演结果与地质图和实地考察相符。反演结果可以对区内酸性岩、中性岩、基性岩进行圈定。更多还原

【Abstract】 There is a close relation between the thermal infrared emissivity spectral features of surface rocks and their SiO2 content.Using the data from the USGS(United State Geological Survey),JPL(Jet Propulsion Laboratory) and JHU(Johns Hopkins University) spectral databases,this paper studies the quantitative relation between SiO2 content and thermal emissivity specra of 52 samples of igneous rocks,and two multi variables stepwise linear regression equations are modeled based on this relation.The ASTER thermal infrared data are used for inversion and retrieval of the SiO2 content in the east Dong-Wuzhumuqin area,South of Daxing’anling.The result of inversion conforms to the geological diagram and field investigation.Acid,intermediate and basic intrusions can be indentified according to the retrieval result.更多还原