摘要
本文以新疆阿尔泰某多金属矿区为例,对岩矿光谱特征、不同岩性段岩石化学特征、细分红外光谱遥感图象色调异常进行研究并通过野外验证后提出:Fe^(3+)除在900nm 处具有强吸收特征外,在2150nm 附近有一个反射峰特征;细分红外光谱遥感图象色调异常的形成机理是与 Fe^(3+)的2150nm 附近的反射峰特征有关的综合光谱信息的反映。
The Altai front polyrnetallic ore zone occurs in the midde-upper part of the 3rd lower Devonian lithomember. The lower Devonian lithomembers are different in their chemical compositions. The rocks containing polymetallic mineralization have higher Fe content and complex mineral components. The spectral features of the 3rd and 4rd lower Devonian lithomembers show their reflective peaks near 2150 nm, except some rocks showing the absorption features of hydroxyl minerals and carbonate minerals. This feature is must clear on the gossan in this test area. The data of 2+3, 4 and 6 bands is used in the image processing, so that the composite spectral information is predominent by the Fe3+ on the image. The yellow tone anomalies are most striking on the characterisuic signal image and distributed mainly in the midde-upper part of the 3rd lower Devonian lithomember. The field test indicates that the lump yellow tone anomalies are produced by the complex geologic bodies composed of ore-bearing impure carbonate, skanized greenschisl and gossan, and the stripe yellow tone anomalies are coincident with the surface Fe3+ contamination of the 3rd lower Devonian lithomeber, or of iron ore body. Thus it indicates that the formation mechanism of FIMS remote sensing image tones is a spectral reflection of the Fe3+ near 2150 nm.
出处
《地质科学》
CAS
CSCD
北大核心
1991年第3期268-276,共9页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
航空遥感地质
多金属
矿产
资源
airborne remote sensing geology, object reflective spectrum, polymetallic: ore, Altai fold belt
