气候变化领域集成服务门户(CCPortal): The long-wave infrared (8-12 μm) spectral features of selected rare earth element—Bearing carbonate, phosphate and silicate minerals

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DOI	10.1016/j.jag.2018.11.005
	The long-wave infrared (8-12 μm) spectral features of selected rare earth element—Bearing carbonate, phosphate and silicate minerals
	Laakso K.; Turner D.J.; Rivard B.; Sánchez-Azofeifa A.
发表日期	2019
ISSN	15698432
起始页码	77
结束页码	83
卷号	76
英文摘要	Rare earth elements (REEs) are a group of metals essential to high technology industries. This high demand, combined with a high supply risk, has led to an understanding that REEs are critical to society. Despite the potential that hyperspectral imaging (HSI) data offers for a fast and non-invasive characterization of the REEs, it is still poorly understood whether REEs have some information in the long-wave infrared (LWIR; 8–12 μm) wavelength range that can be used for their identification. To partially fill this gap, we have investigated the spectroscopy of twelve REE-bearing mineral samples using relatively high spatial and spectral resolution LWIR hyperspectral imaging data. These samples were formerly characterized using electron probe microanalysis (EPMA), scanning electron microscopy (SEM), and hyperspectral imaging data acquired in the 0.4–2.5 μm wavelength range. Results from these analyses were compared to and used to guide the analysis of the HSI data recorded in the LWIR range. This information was further compared to a reference spectral library of rare earth oxides. Our findings suggest that the spectral features of the samples can generally be traced to the asymmetric degenerate stretching and bending modes of the X-O (X = C, Si, P) groups. Moreover and contrary to what has been observed in the shorter wavelengths, there are no definitive spectral features in the LWIR wavelength region that could be assigned to any specific REE. © 2018 Elsevier B.V.
英文关键词	Hyperspectral; Imaging spectroscopy; Long-wave infrared; Mineral; Rare earth element
语种	英语
scopus关键词	carbonate group; infrared spectroscopy; multispectral image; phosphate group; rare earth element; silicate mineral
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156511
作者单位	Centre for Earth Observation Sciences (CEOS), Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
推荐引用方式 GB/T 7714	Laakso K.,Turner D.J.,Rivard B.,等. The long-wave infrared (8-12 μm) spectral features of selected rare earth element—Bearing carbonate, phosphate and silicate minerals[J],2019,76.
APA	Laakso K.,Turner D.J.,Rivard B.,&Sánchez-Azofeifa A..(2019).The long-wave infrared (8-12 μm) spectral features of selected rare earth element—Bearing carbonate, phosphate and silicate minerals.International Journal of Applied Earth Observation and Geoinformation,76.
MLA	Laakso K.,et al."The long-wave infrared (8-12 μm) spectral features of selected rare earth element—Bearing carbonate, phosphate and silicate minerals".International Journal of Applied Earth Observation and Geoinformation 76(2019).