X-ray Fluorescence and Laser-Induced Breakdown Spectroscopy Analysis of Li-Rich Minerals in Veins from Argemela Tin Mine, Central Portugal

Ribeiro, Ricardo M.; Capela, Diana; Ferreira, Miguel F. S.; Martins, Rui C.; Jorge, P. A. S.; Guimarães, Diana; Lima, Alexandre

doi:10.3390/min11111169

Cited by 14 publications

(12 citation statements)

References 21 publications

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“…Riberio et al [62] used a portable XRF analyzer and a bespoke laboratory LIBS system to examine the same locations on quartz, montebrasite, and turquoise in a slab cut from a hydrothermal vein at the Argemela Tin Mine in Central Portugal. LIBS results demonstrated that montebrasite can be distinguished from turquoise because the turquoise did not contain Li.…”

Section: Laboratory Libs Analysis Of LI In Geological Materialsmentioning

confidence: 99%

Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA

et al. 2022

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Laser-induced breakdown spectroscopy (LIBS), which has recently emerged as tool for geochemical analysis outside the traditional laboratory setting, is an ideal tool for Li exploration because it is the only technique that can measure Li in minerals, rocks, soils, and brines in-situ in the field. In addition to being used in many products essential to modern life, Li is a necessary element for a reduced carbon future and Li–Cs–Ta (LCT) granitic pegmatites are an important source of Li. Such pegmatites can have varying degrees of enrichment in Li, Rb, Cs, Be, Sn, Ga, Ta>Nb, B, P, and F. We focus here on the LCT pegmatites of the Carolina Tin-Spodumene Belt (CTSB) situated in the Kings Mountain Shear Zone, which extends from South Carolina into North Carolina. The CTSB hosts both barren and fertile pegmatites, with Li-enriched pegmatites containing spodumene, K-feldspar, albite, quartz, muscovite, and beryl. We illustrate how handheld LIBS analysis can be used for real-time Li analysis in the field at a historically important CTSB pegmatite locality in Gaston County, N.C. in four contexts: (i) elemental detection and identification; (ii) microchemical mapping; (iii) depth profiling; and (iv) elemental quantitative analysis. Finally, as an example of a practical exploration application, we describe how handheld LIBS can be used to measure K/Rb ratios and Li contents of muscovite and rapidly determine the degree of pegmatite fractionation. This study demonstrates the potential of handheld LIBS to drastically reduce the time necessary to acquire geochemical data relevant to acquiring compositional information for pegmatites during a Li pegmatite exploration program.

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Section: Laboratory Libs Analysis Of LI In Geological Materialsmentioning

confidence: 99%

Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA

et al. 2022

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“…Constraints, such as the influence of water content on measurements, the necessity to handle sample volumes, and the requirement for sample preparation pellets, have been noted in prior studies, as identified by Senesi, Cabral, Menegatti, Marangoni and Nicolodelli [12]. Furthermore, the challenges have been acknowledged in quantifying the elements within dried tissues, along with considerations regarding the influence of nitrogen in the atmosphere [23,24]. These challenges posed barriers to the implementation of LIBS in viticultural backgrounds.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Element Characterization of Grapevine Tissue with Laser-Induced Breakdown Spectroscopy

Tosin,

Monteiro-Silva,

Martins

et al. 2024

Horticulturae

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The determination of grape quality parameters is intricately linked to the mineral composition of the fruit; this relationship is increasingly affected by the impacts of climate change. The conventional chemical methodologies employed for the mineral quantification of grape tissues are expensive and impracticable for widespread commercial applications. This paper utilized Laser-Induced Breakdown Spectroscopy (LIBS) to analyze the mineral constituents within the skin, pulp, and seeds of two distinct Vitis vinifera cultivars: a white cultivar (Loureiro) and a red cultivar (Vinhão). The primary objective was to discriminate the potential variations in the calcium (Ca), magnesium (Mg), and nitrogen (N) concentrations and water content among different grape tissues, explaining their consequential impact on the metabolic constitution of the grapes and, by extension, their influence on various quality parameters. Additionally, the study compared the mineral contents of the white and red grape cultivars across three distinct time points post veraison. Significant differences (p < 0.05) were observed between the Loureiro and Vinhão cultivars in Ca concentrations across all the dates and tissues and for Mg in the skin and pulp, N in the pulp and seeds, and water content in the skin and pulp. In the Vinhão cultivar, Ca differences were found in the pulp across the dates, N in the seeds, and water content in the skin, pulp, and seeds. Comparing the cultivars within tissues, Ca exhibited differences in the pulp, Mg in the skin and pulp, N in the pulp and seeds, and water content in the skin, pulp, and seeds. These findings provide insights into the relationship between the grape mineral and water content, climatic factors, and viticulture practices within a changing climate.

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“…Therefore, accurate measurement of Mn content is important in the analysis of low alloy steel. As an emission spectroscopy technology, laser-induced breakdown spectroscopy (LIBS) has many advantages, such as fast analysis, high sensitivity and online real-time monitoring, compared with the traditional technologies such as flame atomic absorption spectrometry and X-radial fluorescence [2][3][4][5]. The main function of LIBS is to analyze the composition and content of elements in substances.…”

Section: Introductionmentioning

confidence: 99%

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

Shen¹,

Chen²,

Luo³

et al. 2023

J. Phys. D: Appl. Phys.

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The influence of resolution on spectral analysis is of great significance to improve the measurement accuracy of laser-induced breakdown spectroscopy (LIBS). In this study, the low alloy steel samples were measured at different resolutions using dual-channel spectrometer simultaneously to discuss the plasma characteristics. The diffraction efficiency of the grating was different at different resolutions, which led to different spectral intensities measured at different resolutions. It affected the LIBS spectral analysis. For plasma spectral analysis, the experimental results showed that the Boltzmann plot method was suitable for calculating the plasma temperature using the low-resolution spectra with 0.076 nm/pixel. Based on the high-resolution spectra with 0.01 nm/pixel, Boltzmann double lines method was applied to calculate the plasma temperature, and the analysis line was IFeI395.668/IFeI400.524. Due to the influence of instrument broadening, Stark broadening could only be used to characterize the electron density using the high-resolution spectra. For quantitative analysis in LIBS spectral analysis, support vector machine regression (SVR) with different inputs was used to quantitatively analyse the Mn content in the low alloy steel. The prediction accuracy of the low-resolution spectra was poor compared to the high-resolution spectra. When the input was the target spectral intensities and the plasma state, the fitting accuracy and prediction accuracy were improved. It showed that SVR combined with the plasma state was an effective method to improve the accuracy of LIBS quantitative analysis of Mn content in low alloy steel.

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X-ray Fluorescence and Laser-Induced Breakdown Spectroscopy Analysis of Li-Rich Minerals in Veins from Argemela Tin Mine, Central Portugal

Cited by 14 publications

References 21 publications

Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA

Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA

A New Approach for Element Characterization of Grapevine Tissue with Laser-Induced Breakdown Spectroscopy

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

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