Sulfate and sulfide sulfur isotopes (δ 34 S and δ 33 S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction

Pribil, Michael J.; Ridley, W. I.; Emsbo, Poul

doi:10.1016/j.chemgeo.2015.07.014

Cited by 36 publications

(32 citation statements)

References 27 publications

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“…Of the 27 initially prepared for δ 34 S and 18 O analysis, eight samples had sulfate concentrations too low for sufficient precipitation of BaSO 4 . Therefore, in these samples, δ 34 S was analyzed using a Nu Instruments multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) at the US Geological Survey High Resolution ICP-MS laboratory, Denver with analytical precision < 0.3 (Pribil et al, 2015).…”

Section: Sulfur and Oxygen Isotope Analysis Of Sulfatementioning

confidence: 99%

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering

Diaz

Michalski

et al. 2020

Front. Earth Sci.

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Diaz et al. Shackleton Glacier Region Salt Geochemistry both slow and rapid freezing and/or the evaporation/sublimation of HCO 3 + CO 3-rich fluids. Our results indicate that the origins of salts from ice-free areas within the CTAM represent a complex interplay of atmospheric deposition, chemical weathering, and post-depositional processes related to glacial history and persistent arid conditions. These findings have important implications for the use of these salts in deciphering past climate and atmospheric conditions, biological habitat suitability, glacial history, and can possibly aid in our future collective understanding of salt dynamics on Mars.

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Section: Sulfur and Oxygen Isotope Analysis Of Sulfatementioning

confidence: 99%

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering

Diaz

Michalski

et al. 2020

Front. Earth Sci.

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“…For example, in-situ sulfur isotopic measurement by laser ablation (LA) MC-ICP-MS has recently been further developed, especially in relation to the investigation of sulfides. [10][11][12][13][14][15][16][17][18][19] Most of the barite present in the Earth's crust forms through the mixing of fluids from diverse origins, including magmatic, 20 metamorphic, 21 hydrothermal, 22 as well as ancient and modern ocean water. 23 The micron scale sulfur isotopic composition of barite and other related sulfates could definitely provide important information regarding their origin and formation history (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Craddock et al 12 introduced laser aerosol to the cyclonic spray dual chamber that was mixed with 2% HNO3 solution, then calibrated with a matrixmatched solution standard to correct the mass bias. In recent studies, Sample-Standard-Bracketing (SSB) is the most popular approach to monitor and correct sulfur isotope mass bias using LA-MC-ICP-MS. 11,[16][17][18][24][25][26][27][28] SSB monitors both the mass bias within the MC-ICP-MS instrument and the laser-induced isotopic fractionation at the ablation site. This approach requires an appropriately matrix-matched solid standard, which can be natural minerals, pressed powder tablets, or other types of artificial solid samples.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Sulfur Isotopic Analysis Of Sulfate By Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS)

Lu¹,

Wei²,

Jiang³

et al. 2020

At.Spectrosc.

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Sulfate minerals are widely distributed in nature and their sulfur isotopic signatures offer a largely untapped source of potential information for improving our understanding of magmatic, hydrothermal, and sedimentary processes. In this study, we describe an analytical procedure for measuring the sulfur isotopic compositions of natural sulfatebearing samples using a LA-MC-ICP-MS (laser ablation multiple collector inductively coupled plasma mass spectrometry) technique. YF-2 barite (BaSO4) from the Yongfu hydrothermal deposit yields a δ 34 S value of 18.1 ± 0.4‰ (n = 11, 2SD), obtained by elemental analyzer-isotope ratio mass spectrometry (EA-IRMS), and has been adopted as the reference material for sulfur isotopic determination in this study. The sulfur isotopic ratios for NBS 127 and IAEA-SO-5 barium sulfate are validated by using YF-2 pressed powder tablets as the internal reference standard, and this analytical protocol yielded results that overlap with recommended values. The δ 34 S values obtained here for the YF-1, GTS, and DGD barites are similar to those recorded by EA-IRMS for these samples. WC barite displays highly variable sulfur isotopic compositions, although the average δ 34 S value for WC barite is similar to that obtained by EA-IRMS. Sulfates in the baritecelestine solid solution series and anhydrite were analyzed to determine the isotopic fractionation in varied matrices using both the RESOlution and GeoLasHD laser ablation systems. The analytical results suggest minimal sulfur isotopic fractionation between barite and other S-bearing matrices using both laser systems. For non-matrix matched sulfur isotope analysis, the ion signal intensity and laser parameters are important parameters that must be closely monitored. If sulfur isotopic fractionation is observed during sample ablation, this feature can be minimized by employing a smaller beam size, lower repetition rate and fluence output.

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“…There is no systematic drift between mapping and spot analysis. One previous study [18] demonstrated that the matrix effect of Ca on S isotope analysis was minimal in wet plasma, however, the effects under laser ablation conditions remain less well constrained. Note that the standard used in this study is a matrix-matched pyrite single crystal.…”

Section: Mapping Of Sulfur Isotopes In Pyritementioning

confidence: 99%

“…An evaluation of potential matrix effects, and their implications for accurate measurement of S isotopes, is thus a pre-requisite before applying mapping techniques to complex multi-phase samples. The matrix effects of Ca on S isotope analysis in wet plasma were investigated in detail by Pribil et al [18] and Liu et al [19].…”

Section: Introductionmentioning

confidence: 99%

Mapping of Sulfur Isotopes and Trace Elements in Sulfides by LA-(MC)-ICP-MS: Potential Analytical Problems, Improvements and Implications

et al. 2016

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Abstract:Constraints on accurate quantitative trace element and sulfur (S) isotope analysis of sulfide minerals, especially pyrite, by laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) remain imperfectly understood at the present time. Mapping of S isotope distributions within a complex sample containing several minerals requires an evaluation of the matrix effects and accuracy. Here, we apply LA-Q(quadrupole)-ICP-MS and LA-MC(multiple collector)-ICP-MS methods to analyze trace elements and S isotopes in sulfides. Spot analysis of S isotopes was conducted to evaluate the influence of matrix effects. The matrix effects from siderite and magnetite are deemed to be negligible in mapping analysis at the precision of this study. Both Fe and S were used as internal standard elements to normalize trace element concentrations in pyrite. Fe proved to be the better choice because the normalized counts per second ratio of trace elements with Fe is much more stable than if using S. A case study of a sulfide sample from the Chengmenshan Cu deposit, Jiangxi Province, South China, demonstrates the potential of combined S isotope and trace element mapping by LA-(MC)-ICP-MS. The results suggest that this deposit underwent multi-stage ore formation. Elements, including Au and Ag, were hosted in early-stage pyrite but were re-concentrated into multi-component sulfide assemblages during a late-stage hydrothermal event, which also led to crosscutting veins containing pyrite largely devoid of trace elements, except Se. Combining in situ S isotope and trace element analysis on the same sample represents a powerful tool for understanding ore-forming processes.

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Sulfate and sulfide sulfur isotopes (δ 34 S and δ 33 S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction

Cited by 36 publications

References 27 publications

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering

In-Situ Sulfur Isotopic Analysis Of Sulfate By Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS)

Mapping of Sulfur Isotopes and Trace Elements in Sulfides by LA-(MC)-ICP-MS: Potential Analytical Problems, Improvements and Implications

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