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Reflectance spectroscopy and geochemical analysis of rare

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Harald van der Werff — University of Twente Research .

Reflectance spectroscopy and geochemical analysis of rare earth element- bearing tailings: A case study of two abandoned tin mine sites in Bangka Island, Indonesia Purwadi, I., van der Werff, H. M. A. & Lievens, C., 2019, In : International Journal of Applied Earth Observation and Geoinformation (JAG). 74, p. 239-247

Development of USGS Geochemical Reference Materia

Continued development of geologic reference materials for rare earth element (REE) analysis: goal is to produce a series a REE reference materials from a variety of matrix types. Development of field portable instrumentation for geochemical analysis: Evaluate USGS field portable Energy Dispersive X-ray Fluorescence (pEDXRF) and Laser Induced Breakdown Spectrometer (LIBS) instruments in terms ...

Response to Comments by Dai et al. on Geochemical .

Response to Comments by Dai et al. on Geochemical Characteristics of Rare-Metal, Rare-Scattered, and Rare-Earth Elements and Minerals in the Late Permian Coals from the Moxinpo Mine, Chongqing, China

Crop Science Abstract - Population Definition, Sample .

Crop Science Abstract - Population Definition, Sample Selection, and Calibration Procedures for Near Infrared Reflectance Spectroscopy View My Binders This article in CS ... Near-infrared spectroscopy for analysis of chemical and microbiological properties of forest soil organic horizons in a heavy-metal-polluted area

Reflectance spectroscopy and imaging spectroscopy of rare .

Reflectance spectroscopy was carried out in the visible to short wave infrared regions (500 nm to 2500 nm) and each sample was characterized using scanning electron microscopy and electron microprobe analysis.

Potential of visible and near-infrared reflectance .

Potential of visible and near-infrared reflectance spectroscopy for the determination of rare earth elements in soil ... J.B. ReevesNear- versus mid-infrared diffuse reflectance spectroscopy for soil analysis emphasizing carbon and laboratory versus on ... D.J. TurnerReflectance Spectroscopy and Imaging Spectroscopy of Rare Earth Element ...

Reflectance Spectroscopy of Beidellites and Their .

Abstract. Beidellites may exist on Mars and represent intermediate alteration products; their presence would indicate different alteration environments than previously identified because montmorillonite is a low-grade alteration mineral whereas beidellite is a higher-temperature alteration mineral, and often represents a step toward illite formation.

Quantitative estimation of concentrations of dissolved .

In this paper, we present a new method for quantitative estimation of the concentration of REE dissolved in aqueous media using reflectance spectroscopy. In our study, pure water, rare earth oxide, and ore leaching liquor samples containing various amounts of REE were collected; the reflectance spectra and the concentrations of REE were ...

Reflectance spectroscopy and geochemical analysis of rare .

Request PDF on ResearchGate | Reflectance spectroscopy and geochemical analysis of rare earth element-bearing tailings: A case study of two abandoned tin mine sites in Bangka Island, Indonesia ...

Visible and short-wave infrared reflectance spectroscopy .

An understanding of the mineralogy and petrogenesis of rare earth element deposits has significant implications for their economic viability. Lanthanide-bearing compounds are known to produce sharp absorption features in the visible to short-wave infrared region (VIS-SWIR), however, a significant knowledge gap exists between the fields of hyperspectral reflectance spectroscopy and rare earth ...

Abstract: Possible applications for visible/infrared .

Possible applications for visible/infrared reflectance . spectroscopy (VIRS) in exploration for rare-earth elements HeatHeR R. aFuSe anD AnDReW AnDReW. Geological Survey of Newfoundland and Labrador, Department of Natural Resources, PO Box 8700, St. John’s, Newfoundland A1B 4J6, Canada. Visible-Infrared Reflectance Spectroscopy (VIRS) uses ab-

MID-INFRARED REFLECTANCE SPECTROSCOPY: WHERE ARE WE, WHERE .

MID-INFRARED REFLECTANCE SPECTROSCOPY: WHERE ARE WE, WHERE ARE WE GOING, AND WHY? Carlé M. Pieters, Brown University, Dept. of Geological Sciences, Providence, RI 02912. [email protected] Introduction: Spectroscopic data obtained in the laboratory for known materials provide the foundation

Exploration 07 - Exploration in the new Millenni

Exploration Criteria for Appraising Geochemical Anomalies through Mapping Geochemical Systems - Pa Goodfellow, W.D. New eyes on old data: A 3-D historical data integration study in the Heath Steele mining camp, Bathurst New Brunswick, Canada.

Hyperspectral remote sensing applications - gfz-potsdam.

Laboratory reflectance spectra of mineralogical standards and vegetation, measured relative to Bariumsulfate (white reflectance standard). Absorption bands within the VNIR range (visible and near infrared) are mainly due to electronic transitions, bands in the SWIR range (short-wave infrared) are caused by vibrational processes of molecular structures.

Feasibility of Reflectance Spectroscopy for the Assessment .

Conventional methods for investigating soil Hg contamination based on raster sampling and chemical analysis are time-consuming and relatively expensive. The objective of this study was to develop a rapid method for investigating Hg concentration in suburban agricultural soils of the Nanjing region using reflectance spectra within the visible-near-infrared (VNIR) region.

Mineralogical and spectroscopic investigation of enstatite .

Mineralogical and spectroscopic investigation of enstatite chondrites by X‐ray diffraction and infrared reflectance spectroscopy. ... Refractory inclusions are rare in E chondrites, ... Biconical reflectance spectroscopy provides a laboratory analog for remote emission infrared spectroscopy, except that ...

X-Ray Fluorescence (XRF) - serc.carleton.e

The XRF method depends on fundamental principles that are common to several other instrumental methods involving interactions between electron beams and x-rays with samples, including: X-ray spectroscopy (e.g., SEM - EDS), X-ray diffraction (), and wavelength dispersive spectroscopy (microprobe WDS). The analysis of major and trace elements in geological materials by x-ray fluorescence is made ...

Visible‐near‐infrared reflectance spectroscopy of volcanic .

1.1 Motivation [5] Here we present results from our Nicaraguan field campaign in August 2012, which visited three sites in addition to our previously studied Cerro Negro field site [Hynek et al., 2011] and focused on in situ analysis of alteration products using a field spectrometer that measured reflectance in the visible to near‐infrared (VNIR) wavelength range similar to instruments at Mars.

A Compact High-Resolution 3-D Imaging Spectrometer for .

A Compact High-Resolution 3-D Imaging Spectrometer for Discovering Oases on Mars1 Jian Ge & Deqing Ren ... though these may be very rare or nonexistent. Rather, they are places where liquid water did ... a quick look analysis tool such as reflectance spectroscopy could allow sorting of samples at a given site. Also, one cannot rule out the ...

Application of Visible/Near-Infrared Reflectance .

In this work, we report the application of near-infrared (NIR) spectroscopy as a non-contact, non-destructive method to rapidly analyze UOC materials for species and/or process information. Diffuse reflectance spectra from 350 to 2500 nm were measured from a number UOC samples that were also characterized by X-ray diffraction.