Abstract
Natural samples of the rare earth element (REE)-bearing silicate minerals cerite, mosandrite, kainosite, zircon, and eudialyte were studied using reflectance spectroscopy in the visible to short-wave infrared regions (500 to 2500 nm) and further characterized by scanning electron microscopy and electron microprobe analysis. Spectral features of these minerals are driven primarily by 4f-4f intraconfigurational electronic transitions of trivalent lanthanides, as well as 5f-5f electronic transitions of uranium and vibrational overtones and combinations of H2O and OH–. Spectra of eudialyte are also impacted by relative amounts of IVFe2+ and VFe2+. Respective spectra of these REE-bearing silicate minerals are sufficiently distinct to enable spectral classification. Spectral variability (e.g., band depths and locations) of some specific REE-related absorptions, such as an Er3+- and Yb3+-related absorption near 978 nm and Nd3+-related absorptions near 746, 803, and 875 nm, are interpreted to be driven by cation site differences in the crystal structures. This work adds to the growing understanding of REE-bearing mineral reflectance spectroscopy, which facilitates detection, identification, and quantification of REE-bearing silicate minerals in remote sensing applications. This is especially relevant for hyperspectral imaging spectroscopy with high spatial resolutions where the spectral response of a pixel becomes increasingly dominated by mineralogy rather than lithology.
Acknowledgments
Tony Mariano and Michel Picard (Canadian Museum of Nature) are thanked for their help with acquiring samples, and Jilu Feng and Steve Creighton for their help with data collection. Financial support is acknowledged from the Natural Sciences and Engineering Research Council of Canada.
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Artikel in diesem Heft
- Crystallography on Mars: Curiosity’s Bragging right
- Al diffusion in quartz
- Relationships between unit-cell parameters and composition for rock-forming minerals on Earth, Mars, and other extraterrestrial bodies
- Crystal chemistry of martian minerals from Bradbury Landing through Naukluft Plateau, Gale crater, Mars
- Petrogenesis of martian sulfides in the Chassigny meteorite
- Immiscible sulfide melts in primitive oceanic magmas: Evidence and implications from picrite lavas (Eastern Kamchatka, Russia)
- Snapshots of primitive arc magma evolution recorded by clinopyroxene textural and compositional variations: The case of hybrid crystal-rich enclaves from Capo Marargiu Volcanic District (Sardinia, Italy)
- Three-dimensional distribution of primary melt inclusions in garnets by X-ray microtomography
- Visible and short-wave infrared reflectance spectroscopy of selected REE-bearing silicate minerals
- Determination of Al/Si order in sillimanite by high angular resolution electron channeling X-ray spectroscopy, and implications for determining peak temperatures of sillimanite
- Ascent rates of rhyolitic magma at the onset of three caldera-forming eruptions
- Temperature dependence of Raman shifts and line widths for Q0 and Q2 crystals of silicates, phosphates, and sulfates
- Single-crystal elastic properties of minerals and related materials with cubic symmetry
- Sodium amphibole in the post-glaucophane high-pressure domain: The role of eckermannite
- Non-hydrostatic stress field orientation inferred from orthopyroxene (Pbca) to low-clinoenstatite (P21/c) inversion in partially dehydrated serpentinites
- Letter
- UHP Ti-chondrodite in the Zermatt-Saas serpentinite: Constraints on a new tectonic scenario
- Book Review
- Book Review
Artikel in diesem Heft
- Crystallography on Mars: Curiosity’s Bragging right
- Al diffusion in quartz
- Relationships between unit-cell parameters and composition for rock-forming minerals on Earth, Mars, and other extraterrestrial bodies
- Crystal chemistry of martian minerals from Bradbury Landing through Naukluft Plateau, Gale crater, Mars
- Petrogenesis of martian sulfides in the Chassigny meteorite
- Immiscible sulfide melts in primitive oceanic magmas: Evidence and implications from picrite lavas (Eastern Kamchatka, Russia)
- Snapshots of primitive arc magma evolution recorded by clinopyroxene textural and compositional variations: The case of hybrid crystal-rich enclaves from Capo Marargiu Volcanic District (Sardinia, Italy)
- Three-dimensional distribution of primary melt inclusions in garnets by X-ray microtomography
- Visible and short-wave infrared reflectance spectroscopy of selected REE-bearing silicate minerals
- Determination of Al/Si order in sillimanite by high angular resolution electron channeling X-ray spectroscopy, and implications for determining peak temperatures of sillimanite
- Ascent rates of rhyolitic magma at the onset of three caldera-forming eruptions
- Temperature dependence of Raman shifts and line widths for Q0 and Q2 crystals of silicates, phosphates, and sulfates
- Single-crystal elastic properties of minerals and related materials with cubic symmetry
- Sodium amphibole in the post-glaucophane high-pressure domain: The role of eckermannite
- Non-hydrostatic stress field orientation inferred from orthopyroxene (Pbca) to low-clinoenstatite (P21/c) inversion in partially dehydrated serpentinites
- Letter
- UHP Ti-chondrodite in the Zermatt-Saas serpentinite: Constraints on a new tectonic scenario
- Book Review
- Book Review