【摘要】 硅酸盐矿物热红外发射率光谱特征与其SiO2含量有很好的对应关系。本文以ASU(Arizona State University)、JHU(Johns Hopkins University)光谱库为数据源,研究了硅酸盐矿物发射率光谱克里斯琴森特征(CF-Christensen Features)与SiO2含量、 SCFM(SiO2／(SiO2+FeO+MgO+CaO))指数的定量关系,并与Copper对火成岩的研究结果进行了对比,二者吻合,可作为热红外发射率光谱线性混合的佐证。建立了表征硅酸盐矿物SiO2含量的SiO2指数(ε12／ε13)与SiO2含量的定量关系,在此基础上,利用 ASTER热红外数据对东天山黄山东地区SiO2进行了定量反演,反演结果与地质事实相符。利用反演结果可以对基性超基性岩体进行圈定,对于寻找与基性超基性岩体有关的铜镍矿床有重要的应用价值。更多还原

【Abstract】 There is a good correspondence between the thermal infrared emissivity spectral features of silicate minerals and their SiO2 content. Using the data from the ASU (Arizona State University) and JHU (Johns Hopkins University) spectral databases, the authors studied the quantitative relation of the Christensen features (CF) of the emissivity spectra to the SiO2 content and SCFM (SiO2/(SiO2+FeO+MgO+CaO)) index and correlated the research results with Copper’s research results derived from igneous rocks. The correlation shows that they are coincident. This is evidence of linear mixing of thermal infrared emissivity spectra. The quantitative relation of the SiO2 content and the SiO2 index (ε12/ε13) indicating the SiO2 content. Based on this relation, the ASTER thermal infrared data were used for inversion and retrieval of the SiO2 content in the Huangshandong area, East Tianshan. The result of inversion conforms to the geological fact. Basic-ultrabasic intrusions can be delineated using the inversion result, so this method has great application value in looking for copper-nickel deposits associated with basic-ultrabasic intrusions.更多还原