DOI: 10.1016/j.jag.2017.02.007
Scopus记录号: 2-s2.0-85032185867
论文题名: Application of visible and infrared spectroscopy for the evaluation of evolved glauconite
作者: Chattoraj S ; L ; , Banerjee S ; , van der Meer F ; , Champati Ray P ; K
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 301
结束页码: 310
语种: 英语
英文关键词: Emissivity
; Expandable layers
; Glauconite maturity
; Reflectance
; Visible-SWIR
Scopus关键词: absorption
; emissivity
; glauconite
; infrared spectroscopy
; reflectance
英文摘要: The Oligocene Maniyara Fort Formation in western India exhibits two distinct glauconite types with different maturation states, which are characterized by their spectral response in the visible to infrared spectrum of electromagnetic radiation. Spectral signatures of Maniyara Fort glauconites display absorption features at approximately 0.77, 1.08, 1.9, 2.3 μm in the visible-short-wave infrared (SWIR) and 2.8 and 10 μm in the mid-infrared (MIR) region which vary with K2O content of glauconite. The spectra of glauconite varies significantly as a function of its cationic contents and substitution in different sites. The maturity is found to increase in tandem with the metal–metal charge transfer (CT) and the Fe2+ dd absorption band respectively at 1.08 and 0.77 μm. H2O and OH− signatures at the NIR region reflect differences in the sensitivity of glauconites with different molecular H2O content. In the MIR region, a gradual shift of the Si–O stretch at 10 μm towards lower wavelengths indicates the dominance of smectite layers in glauconites. This study demonstrates a strong correlation between the proportion of expandable layers in the glauconite structure with variations in characteristic band position, depth and symmetry in reflectance and emissivity. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79909
Appears in Collections: 气候变化事实与影响
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作者单位: Indian Institute of Remote Sensing, Indian Space Research Organization, 4-Kalidas Road, Dehradun, India; Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai, India; Department of Earth Systems Analysis, University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC), Netherlands
Recommended Citation:
Chattoraj S,L,, Banerjee S,et al. Application of visible and infrared spectroscopy for the evaluation of evolved glauconite[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64