Evaluating the utility of elemental measurements obtained from factory-calibrated field-portable X-Ray fluorescence units for aquatic sediments

Dunnington, Dewey; Spooner, Ian; White, Chris E.; Gagnon, Graham A.

doi:10.1016/j.envpol.2019.03.001

Cited by 10 publications

(1 citation statement)

References 25 publications

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“…Homogenized samples finer than 125 µm were analyzed for trace and rare Earth elements with x-ray fluorescence (XRF) using a ThermoFisher Scientific Niton XL5 Handheld Analyzer. While hand-held XRF analyzers are unable to measure elemental concentrations on discrete sediment samples with the precision of conventional XRF or other spectrometry methods (Dunnington et al, 2019;Hahn et al, 2019), the results allow comparison of general concentrations downcore and between cores. Furthermore, discrete XRF measurements allow for direct comparison of various measurements conducted on the same sediment samples and are less prone to porewater bias when compared to XRF scanner data.…”

Section: Physical and Chemical Analysesmentioning

confidence: 99%

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

et al. 2022

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Subglacial meltwater drainage can enhance localized melting along grounding zones and beneath the ice shelves of marine-terminating glaciers. Efforts to constrain the evolution of subglacial hydrology and the resulting influence on ice stability in space and on decadal to millennial timescales are lacking. Here, we apply sedimentological, geochemical, and statistical methods to analyze sediment cores recovered offshore Thwaites Glacier, West Antarctica to reconstruct meltwater drainage activity through the pre-satellite era. We find evidence for a long-lived subglacial hydrologic system beneath Thwaites Glacier and indications that meltwater plumes are the primary mechanism of sedimentation seaward of the glacier today. Detailed core stratigraphy revealed through computed tomography scanning captures variability in drainage styles and suggests greater magnitudes of sediment-laden meltwater have been delivered to the ocean in recent centuries compared to the past several thousand years. Fundamental similarities between meltwater plume deposits offshore Thwaites Glacier and those described in association with other Antarctic glacial systems imply widespread and similar subglacial hydrologic processes that occur independently of subglacial geology. In the context of Holocene changes to the Thwaites Glacier margin, it is likely that subglacial drainage enhanced submarine melt along the grounding zone and amplified ice-shelf melt driven by oceanic processes, consistent with observations of other West Antarctic glaciers today. This study highlights the necessity of accounting for the influence of subglacial hydrology on grounding-zone and ice-shelf melt in projections of future behavior of the Thwaites Glacier ice margin and marine-based glaciers around the Antarctic continent.

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Section: Physical and Chemical Analysesmentioning

confidence: 99%

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

et al. 2022

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Application of X‐ray fluorescence in forensic archeology: A review

Manhas,

Tomar,

Tiwari

et al. 2024

X-Ray Spectrometry

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Forensic Archeology is the application of techniques and principles of archeology in the pursuit of examining a crime or incident with legal interest. A wide range of analytical studies are employed in examining archeological remains. X‐ray fluorescence (XRF) spectroscopy remains to be one of the most used techniques for rapid examination of trace evidence typically found on an archeological crime scene. Studies of interest generally include finding trace elements from various sources, samples, and different environmental conditions and distinguishing whether a skeletal remains under examination is human, animal, or marine species. The present study has been designed to focus on the application of XRF in archeological and anthropological evidences such as the examination of human skeletal and dental remains, determination of species, examination of soil, ceramics, paintings, coins, and so on. The advantage of XRF as derived from the reported literature is that it is a non‐destructive technique making it ideal for forensic analysis and in situ examination. The study also discusses the factors affecting forensic investigations of archeological evidences and the limitations of XRF.

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Evaluating the performance of calculated elemental measures in sediment archives

et al. 2020

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Evaluating the utility of elemental measurements obtained from factory-calibrated field-portable X-Ray fluorescence units for aquatic sediments

Cited by 10 publications

References 25 publications

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

Application of X‐ray fluorescence in forensic archeology: A review

Evaluating the performance of calculated elemental measures in sediment archives

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