Femtosecond laser ablation multicollector ICPMS analysis of uranium isotopes in NIST glass

Duffin, Andrew M.; Springer, Kellen; Ward, Jesse; Jarman, Kenneth D.; Robinson, John; Endres, Mackenzie C.; Hart, Garret L.; González, Jhanis; Oropeza, Dayana; Russo, Richard E.; Willingham, David; Naes, Benjamin E.; Fahey, A. J.; Eiden, Gregory C.

doi:10.1039/c4ja00452c

Cited by 24 publications

(27 citation statements)

References 35 publications

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“…NIST 614 standard glass is used as the primary reference material for calibration of both the elemental concentration data and the U‐Pb isotope data. Normalization values for NIST 614 are those recommended by Jochum et al () for the elemental concentrations, the Pb isotopic ratios of Woodhead and Hergt (), and a 206 Pb/ 238 U isotopic ratio of 0.81084 calculated from those values and the U isotopic composition determined by Duffin et al (). Importantly, the Pb isotopic composition of NIST 614 is accurately and precisely know from ID thermal ionization mass spectrometry (ID‐TIMS) analyses (Woodhead & Hergt, ); the NIST 614 U‐Pb ratio is used to calculate a U/Pb fractionation factor between NIST 614 and the analyzed carbonates.…”

Section: Data Processingmentioning

confidence: 99%

An Image Mapping Approach to U‐Pb LA‐ICP‐MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation

Drost

Chew

Petrus

et al. 2018

Geochem Geophys Geosyst

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We present a new approach to laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) U‐Pb dating of carbonates based on selection and pooling of pixels from 2‐D elemental and isotopic ratio maps. This image mapping technique is particularly useful for targeting subdomains in samples with complex geological histories. Key major and trace elements that are sensitive to detrital components, postformational fluid ingress, mineralogical changes, or diagenetic overprinting are measured along with the Pb and U isotopic data. Laser sampling is undertaken along successive linear rasters that are compiled into maps using the Monocle add‐on for Iolite, with one pixel in the map corresponding to one time slice of the time‐resolved signal. These element, element ratio, and isotope ratio maps can be overlain over photomicrographs or scanning electron microscopy images to spatially link compositional data to textural and structural features. The pixels corresponding to likely homogeneous age domains can be isolated by applying appropriate selection criteria (e.g., Th < 0.3 ppm, Mg/Ca < 0.004) and pooled into pseudo‐analyses using a proxy for the parent/daughter ratio (e.g., 207Pb/235U, 238U/208Pb) to retrieve the largest possible spread of the data points on isochron diagrams. The approach is best suited for analytical setups capable of rapidly or simultaneously scanning over a large mass range and can yield a precision of ±1% or better on quadrupole instruments depending on U concentration, 238U/204Pb, and age of the sample. The sample‐specific filtering criteria for selection and rejection of data and their rationale can be reported, resulting in more transparency with regard to data processing.

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Section: Data Processingmentioning

confidence: 99%

An Image Mapping Approach to U‐Pb LA‐ICP‐MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation

Drost

Chew

Petrus

et al. 2018

Geochem Geophys Geosyst

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“…The GBW04420 and GSG was analyzed twice intercalated with every 6 unknown analyses. The element contents of the uranium minerals were corrected by use of US national standard reference substance SRM 610 and United States Geological Survey (USGS) standard substances BHVO-2G, BCR-2G, and BIR-1G (external standard) [37,38]. The signal acquisition time of each sample was 100 s. Finally, the sample data were processed by use of Data Cal [37], and the age calculations and union drawing were done by use of Isoplot 3.0 [39].…”

Section: La-icp-ms Uraninite U-pb Agesmentioning

confidence: 99%

In-Situ LA-ICP-MS Uraninite U–Pb Dating and Genesis of the Datian Migmatite-Hosted Uranium Deposit, South China

et al. 2021

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The Datian uranium deposit is a migmatite-hosted, high temperature, hydrothermal deposit in the Kangdian region. Detailed information on the chemical composition and formation age of the uraninite remains lacking, which impedes our understanding of uraninite genesis. Two phases of uraninite have been identified according to their relationships with other minerals and their field relationships. The phase 1 (Ur1) uraninite is characterized by local development of microfractures and pores in the crystal of uraninite, a scattered distribution, and irregular crystal shapes, and it is associated with ilmenite, biotite, and rare earth element (REE) minerals (monazite and xenotime). The phase 2 uraninite (Ur2) has anhedral crystal shapes with well-developed microfractures and pores and is associated with pyrite, albite, pyrrhotite, molybdenite, zircon, and chlorite. X-ray element mapping revealed that the distributions of U, Th, and Pb in the Ur1 uraninite are homogeneous, whereas those in the Ur2 uraninite are heterogeneous. The results of the electron microprobe analysis (EMPA) show that the UO2 and PbO contents of the Ur1 and Ur2 uraninite do not vary significantly. The high ThO2 contents of the Ur1 (1.08–1.68 wt %) and Ur2 uraninite (3.41–4.83 wt %) indicate that they formed at different temperatures. The laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis results show that the ∑REE of the Ur1 uraninite (3747.5–7032.3 ppm) is lower than that of the Ur2 uraninite (8369.2–11,484.3 ppm), and the REE patterns of the Ur1 and Ur2 uraninite are sickle-shaped with large negative Eu anomalies. The LA-ICP-MS U–Pb dating results revealed that the ages of the Ur1 (841.4 ± 4.0 Ma) and Ur2 (834.5 ± 4.1 Ma–837.2 ± 4.5 Ma) uraninite are in consistent with that of the migmatite. Thus, the Datian uranium deposit underwent at least two hydrothermal events, and the uraninite was formed due to the migmatization.

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“…The aerosolized material is carried from the chamber within the He carrier gas, mixed with Ar gas, and introduced to the ICP digester. The ICP-MS setup can then be the same as described above, with the highest isotopic resolution obtained with a magnetic sector MS with multi-collector detection (MC-ICP-MS) (Duffin et al 2013(Duffin et al , 2015.…”

Section: Laser Ablation Icp-msmentioning

confidence: 99%

Evaluation of Uranium-235 Measurement Techniques

Kaspar

Lavender

Dibert

2017

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Femtosecond laser ablation multicollector ICPMS analysis of uranium isotopes in NIST glass

Abstract: We utilized femtosecond laser ablation and multi-collector inductively coupled plasma mass spectrometry to measure the uranium isotopic content of NIST 61x (x = 0, 2, 4, 6) glasses.

Cited by 24 publications

References 35 publications

An Image Mapping Approach to U‐Pb LA‐ICP‐MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation

An Image Mapping Approach to U‐Pb LA‐ICP‐MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation

In-Situ LA-ICP-MS Uraninite U–Pb Dating and Genesis of the Datian Migmatite-Hosted Uranium Deposit, South China

Evaluation of Uranium-235 Measurement Techniques

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