Supplementary material to &amp;quot;Vectors to ore in replacive VMS deposits of the northern Iberian Pyrite Belt: mineral zoning, whole rock geochemistry, and use of portable XRF&amp;quot;

Gisbert, Guillem; Tornos, Fernando; Losantos, Emma; Pons, Juan Manuel; Videira, Juan Carlos

doi:10.5194/se-2021-50-supplement

2021

DOI: 10.5194/se-2021-50-supplement

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Supplementary material to "Vectors to ore in replacive VMS deposits of the northern Iberian Pyrite Belt: mineral zoning, whole rock geochemistry, and use of portable XRF"

Guillem Gisbert¹,

Fernando Tornos²,

Emma Losantos³

et al.

Abstract: SUPPLEMENTARY MATERIALS 1 S1.1 Geology of the Iberian Pyrite BeltFormation of the IPB VMS district is related to the geodynamic evolution leading to the growth of the Variscan orogen in the southern Iberian Peninsula during late Paleozoic. The IPB belongs to the southernmost domain of the Variscan Belt in

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Near real-time management of spectral interferences with portable X-ray fluorescence spectrometers: application to Sc quantification in nickeliferous laterite ores

Lacroix¹,

Cauzid²,

Teitler³

et al. 2021

GEEA

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Since the development of portable XRF (pXRF) spectrometers, few studies have been conducted on the influence of spectral interferences between chemical elements. This study aims to improve the management of these interferences to obtain more reliable geochemical analyses. We specifically investigate Ca-related interferences on Sc analysis for the case of Ni-rich laterite samples using the Niton XL3t GOLDD+ pXRF analyser. Three quantification methods were tested on 59 pelletised samples using the ‘Soil’ mode. The first named ‘Manufacturer’, represents the elemental quantification directly provided by the device based on Regions of Interest (ROI) and multilinear corrections of spectral interferences configured during the spectrometer design. The second, the ‘20 Cu’ method, is based on spectral fitting using the PyMCA software. The third, the ‘18 Fe’ method, combines spectral fitting with modified experimental conditions. For each, a quantification methodology was developed, establishing (i) Ca and Sc calibration lines and (ii) Ca/Sc threshold values delimiting fields of ‘reliable’, 'to be confirmed,’ and ‘unreliable’ measurements. The ‘20 Cu’ and ‘18 Fe’ methods greatly extend the ‘reliable measurements’ field concerning the Ca/Sc ratio compared to the ‘Manufacturer’ method. The ‘18 Fe’ method was also found to provide the most negligible measurement dispersion.Supplementary material:https://doi.org/10.6084/m9.figshare.c.5511838

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Near real-time management of spectral interferences with portable X-ray fluorescence spectrometers: application to Sc quantification in nickeliferous laterite ores

Lacroix¹,

Cauzid²,

Teitler³

et al. 2021

GEEA

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show abstract

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Supplementary material to "Vectors to ore in replacive VMS deposits of the northern Iberian Pyrite Belt: mineral zoning, whole rock geochemistry, and use of portable XRF"

Cited by 1 publication

References 30 publications

Near real-time management of spectral interferences with portable X-ray fluorescence spectrometers: application to Sc quantification in nickeliferous laterite ores

Near real-time management of spectral interferences with portable X-ray fluorescence spectrometers: application to Sc quantification in nickeliferous laterite ores

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