Laser-induced breakdown spectroscopy (LIBS) as a tool for in situ mapping and textural interpretation of lithium in pegmatite minerals

Sweetapple, Marcus T.; Tassios, Steven

doi:10.2138/am-2015-5165

Cited by 54 publications

(28 citation statements)

References 35 publications

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“…Two distinct linear relationships between line intensity and Li concentration have been observed, one up to 0.3% and the other one between 0.3% and 8.5%. Sweetapple and Tassios [] used LIBS in ambient indoor atmospheric conditions to calibrate lithium. Their model was based on univariate calibration on the Li I 812.644 nm line.…”

Section: Methodsmentioning

confidence: 99%

Alkali trace elements in Gale crater, Mars, with ChemCam: Calibration update and geological implications

et al. 2017

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The Chemistry Camera (ChemCam) instrument onboard Curiosity can detect minor and trace elements such as lithium, strontium, rubidium, and barium. Their abundances can provide some insights about Mars' magmatic history and sedimentary processes. We focus on developing new quantitative models for these elements by using a new laboratory database (more than 400 samples) that displays diverse compositions that are more relevant for Gale crater than the previous ChemCam database. These models are based on univariate calibration curves. For each element, the best model is selected depending on the results obtained by using the ChemCam calibration targets onboard Curiosity. New quantifications of Li, Sr, Rb, and Ba in Gale samples have been obtained for the first 1000 Martian days. Comparing these data in alkaline and magnesian rocks with the felsic and mafic clasts from the Martian meteorite NWA7533—from approximately the same geologic period—we observe a similar behavior: Sr, Rb, and Ba are more concentrated in soluble‐ and incompatible‐element‐rich mineral phases (Si, Al, and alkali‐rich). Correlations between these trace elements and potassium in materials analyzed by ChemCam reveal a strong affinity with K‐bearing phases such as feldspars, K‐phyllosilicates, and potentially micas in igneous and sedimentary rocks. However, lithium is found in comparable abundances in alkali‐rich and magnesium‐rich Gale rocks. This very soluble element can be associated with both alkali and Mg‐Fe phases such as pyroxene and feldspar. These observations of Li, Sr, Rb, and Ba mineralogical associations highlight their substitution with potassium and their incompatibility in magmatic melts.

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Section: Methodsmentioning

confidence: 99%

Alkali trace elements in Gale crater, Mars, with ChemCam: Calibration update and geological implications

et al. 2017

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“…There is the additional feature that LIBS sampling is highly spatially resolved, as the plasma forms over a limited spatial area of only tens to hundreds of microns on the sample surface, so that only a small amount of material (typically picograms to nanograms) is sampled by each laser pulse. This allows for in situ analysis of individual particles, mineral grains, or inclusions [33,[37][38][39][40][41], as well as the fine-scale compositional mapping of a complex sample such as a chemically zoned mineral [42][43][44][45][46][47], the analysis of thin crusts, coatings, or surface alteration zones without substrate interference [48], or chemical analysis at highly spatially resolved spatial scales to below~10 µm [47,[49][50][51][52][53][54]. Stratigraphic analysis of a sample by depth profiling is also possible, as sequential ablation forms a vertical crater that progressively bores down into a sample with successive laser pulses [55][56][57].…”

Section: Specific Attributes Of Libsmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy—An Emerging Analytical Tool for Mineral Exploration

et al. 2019

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The mineral exploration industry requires new methods and tools to address the challenges of declining mineral reserves and increasing discovery costs. Laser-induced breakdown spectroscopy (LIBS) represents an emerging geochemical tool for mineral exploration that can provide rapid, in situ, compositional analysis and high-resolution imaging in both laboratory and field and settings. We demonstrate through a review of previously published research and our new results how LIBS can be applied to qualitative element detection for geochemical fingerprinting, sample classification, and discrimination, as well as quantitative geochemical analysis, rock characterization by grain size analysis, and in situ geochemical imaging. LIBS can detect elements with low atomic number (i.e., light elements), some of which are important pathfinder elements for mineral exploration and/or are classified as critical commodities for emerging green technologies. LIBS data can be acquired in situ, facilitating the interpretation of geochemical data in a mineralogical context, which is important for unraveling the complex geological history of most ore systems. LIBS technology is available as a handheld analyzer, thus providing a field capability to acquire low-cost geochemical analyses in real time. As a consequence, LIBS has wide potential to be utilized in mineral exploration, prospect evaluation, and deposit exploitation quality control. LIBS is ideally suited for field exploration programs that would benefit from rapid chemical analysis under ambient environmental conditions. Minerals 2019, 9, 718 2 of 45 government to search for additional mineral resources in green-field (i.e., remote) and brown-field (i.e., near mine) exploration environments [7][8][9]. However, the global trends of declining mineral reserves for many commodities and increasing discovery costs [3,4,10] suggest that exploration investment is insufficient and/or is not being deployed in the most effective manner possible. Both trends are also occurring at a time when new mineral deposit discoveries tend to be deeper, covered, and/or more remote, which are unlike near-surface mines that were often found, at least initially, by prospectors [4,[7][8][9]11].To address increasing demand and declining mineral reserves from deeper and more challenging deposits, the mineral exploration industry had to evolve and innovate by adopting new, cost-effective methodologies and technologies. For example, new conceptual models provide a predictive framework to identify the kinds of large-scale geological environments that should be considered the most prospective for finding additional mineral resources in greenfield areas of sparse geological data [12-15]. The ore system concept, which includes all of the geological processes required to transport and concentrate ore components from source to ore (i.e., drivers, sources, pathways, and traps), is one such predictive framework [12][13][14]16]. Because each of the required ore-forming components is manifested in the rock record as chan...

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“…Alumina beads (2-4 mm diameter, total porous volume 0.63 cm 3 /g, SBET = 70 m 2 /g) were put in contact with the solution in a rotating beaker. After impregnation, the catalysts were dried at 393 K overnight and calcined under airflow at 723 K during 2 hours.…”

Section: Samplesmentioning

confidence: 99%

“…The imaging capability of Laser-induced breakdown spectroscopy (LIBS) represents an attractive way of development for the technique, with innumerable applications in various fields, such as geology [1][2][3], industry [4][5][6][7][8], surface science [9,10] and biology [11][12][13][14][15]. In LIBS imaging, laser-induced plasma are generated continuously while scanning the sample surface over the region of interest.…”

Section: Introductionmentioning

confidence: 99%

Quantitative elemental imaging of heterogeneous catalysts using laser-induced breakdown spectroscopy

Trichard

Sorbier

Moncayo

et al. 2017

Spectrochimica Acta Part B: Atomic Spectroscopy

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Nowadays, the use of catalysis is implied in almost all industrial process. Their use allows improving productivity, synthesis yields and waste treatment as well as decreasing the energy costs. The increasingly stringent requirements in terms of reaction selectivity and environmental standards impose an ever more accurate knowledge and control of their operations. However, the characterization techniques struggle to develop and often require equipment with high complexity.In this paper, we demonstrate a novel elemental approach with an all-optical design allowing quantitative space-resolved analysis to be performed with ppm-scale limit of quantification and µm-scale resolution. This approach, based on laser-induced breakdown spectroscopy (LIBS), is distinguished by its simplicity of use, all-optical design, and speed of operation. This work was conducted on palladium-based porous alumina catalyst, used for the selective hydrogenation process in the field of petrochemistry. We report an exhaustive study on the quantification capability of this technique with the possibility to perform imaging measurement over a large dynamical range, typically from few ppm to %. These results offer new insight into the use of LIBS imaging in the industry and paves the way for innumerable applications.2

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Laser-induced breakdown spectroscopy (LIBS) as a tool for in situ mapping and textural interpretation of lithium in pegmatite minerals

Cited by 54 publications

References 35 publications

Alkali trace elements in Gale crater, Mars, with ChemCam: Calibration update and geological implications

Alkali trace elements in Gale crater, Mars, with ChemCam: Calibration update and geological implications

Laser-Induced Breakdown Spectroscopy—An Emerging Analytical Tool for Mineral Exploration

Quantitative elemental imaging of heterogeneous catalysts using laser-induced breakdown spectroscopy

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