High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS

Nanne, J. A. M.; Millet, Marc-Alban; Burton, Kevin W.; Dale, C. W.; Nowell, Geoff; Williams, Helen M.

doi:10.1039/c6ja00406g

Cited by 24 publications

(13 citation statements)

References 73 publications

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“…As a result of recent advances in mass spectrometry a growing arsenal of nontraditional mass-dependent isotope systems have been applied to investigate the evolution of the Earth and other terrestrial bodies in the solar system, such as Mg (Teng et al, 2010;Hin et al, 2017), Ca (Simon and DePaolo, 2010;Chen et al, 2019), Fe (Craddock and Dauphas, 2011;Debret et al, 2016), Cr (Bonnand et al, 2016;Schoenberg et al, 2016), V (Prytulak et al, 2013;Prytulak et al, 2016;Sossi et al, 2018) and Ni (Klaver et al, 2020). In particular, analytical advances have enabled increasing application of non-traditional isotopes to study high temperature processes, such as magmatic differentiation, where magnitudes of equilibrium isotope fractionation were generally inferred to be too small to resolve prior to the advent of high resolution MC-ICP-MS (Zhang et al, 2011;Millet et al, 2012;Millet and Dauphas, 2014;Teng et al, 2015;Willbold et al, 2016;McCoy-West et al, 2017;Nanne et al, 2017). Titanium is a refractory lithophile element that is highly fluid-immobile and abundant in igneous rocks.…”

Section: Introductionmentioning

confidence: 99%

Melt chemistry and redox conditions control titanium isotope fractionation during magmatic differentiation

Hoare

Klaver

Saji

et al. 2020

Geochimica et Cosmochimica Acta

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Titanium offers a burgeoning isotope system that has shown significant promise as a tracer of magmatic processes. Recent studies have shown that Ti displays significant massdependent variations linked to the crystallisation of Fe-Ti oxides during magma differentiation.We present a comprehensive set of Ti isotope data for a range of differentiation suites from alkaline (Ascension Island, Afar and Heard Island), calc-alkaline (Santorini) and tholeiitic (Monowai seamount and Alarcon Rise) magma series to further explore the mechanics of Ti isotope fractionation in magmas. Whilst all suites display an increase in 49/47 Ti (deviation in 49 Ti/ 47 Ti of a sample relative to the OL-Ti reference material) during magma differentiation relative to indices such as increasing SiO 2 and decreasing Mg#, our data reveal that each of the three magma series have contrasting 49/47 Ti fractionation patterns over comparable ranges of SiO 2 and Mg#. Alkaline differentiation suites from intraplate settings display the most substantial range of variation ( 49/47 Ti = +0.01 to +2.32 ), followed by tholeiites (-0.01 to +1.06 ) and calc-alkaline magmas (+0.06 to +0.64 ). Alkaline magmas possess high initial melt TiO 2 contents which enables early saturation of ilmenite + titanomagnetite and a substantial degree of oxide crystallisation, whereas tholeiitic and calc-alkaline suites crystallise less oxide and have titanomagnetite as the dominant oxide phase. Positive slopes of FeO*/TiO 2 vs. SiO 2 during magma differentiation are related to high degrees of crystallisation of Ti-rich oxides (i.e. ilmenite). Bulk solid-melt Ti isotope fractionation factors co-vary with the magnitude of the slope of FeO*/TiO 2 vs. SiO 2 during magma differentiation, this indicates that the modal abundance and composition of the Fe-Ti oxide phase assemblage, itself is controlled by melt composition, governs Ti isotope fractionation during magma evolution. In addition to this overall control, hydrous, oxidised calc-alkaline suites display a resolvable increase in 49/47 Ti at higher Mg# relative to drier and more reduced tholeiitic arc suites. These subparallel Ti isotope fractionation patterns are best explained by the earlier onset of oxide segregation in arc magmas with a higher oxidation state and H 2 O content. This indicates the potential of Ti isotopes to be utilised as proxies for geodynamic settings of magma generation.

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Section: Introductionmentioning

confidence: 99%

Melt chemistry and redox conditions control titanium isotope fractionation during magmatic differentiation

Hoare

Klaver

Saji

et al. 2020

Geochimica et Cosmochimica Acta

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“…Osmium has been measured using a 188 Os‐ 190 Os double spike, with typical measurement repeatability of ± 0.01–0.02‰ and long‐term measurement reproducibility of ± 0.03‰ attained on δ 190/188 Os for 2.3–45 ng Os loads; a measurement repeatability of < 40 ppm and measurement reproducibility of 100–300 ppm can be simultaneously achieved for 187 Os/ 188 Os and 186 Os/ 188 Os ratios (Nanne et al . ). The authors also reported generally comparable results for measurements on MC‐ICP‐MS.…”

Section: Advances In Thermal Ionisation Mass Spectrometrymentioning

confidence: 97%

“…Lead has been measured using a 207 Pb double spike, with typical measurement repeatability on the 207 Pb/ 206 Pb ratio of 60 ppm and 40 ppm (2SE) achieved for 2 ng and 10 ng loads of Pb, respectively (Paul et al 2015). Osmium has been measured using a 188 Os double spike, with typical measurement repeatability of ± 0.01-0.02‰ and long-term measurement reproducibility of ± 0.03‰ attained on d 190/188 Os for 2.3-45 ng Os loads; a measurement repeatability of < 40 ppm and measurement reproducibility of 100-300 ppm can be simultaneously achieved for 187 Os/ 188 Os and 186 Os/ 188 Os ratios (Nanne et al 2017). The authors also reported generally comparable results for measurements on MC-ICP-MS.…”

Section: Double Spike Techniquementioning

confidence: 99%

GGR Biennial Critical Review: Analytical Developments Since 2014

Linge

Bèdard

Bugoi

et al. 2017

Geostandard Geoanalytic Res

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This GGR biennial critical review covers developments and innovations in key analytical methods published since January 2014, relevant to the chemical, isotopic and crystallographic characterisation of geological and environmental materials. In nine selected analytical fields, publications considered to be of wide significance are summarised, background information is provided and their importance evaluated. In addition to instrumental technologies, this review also presents a summary of new developments in the preparation and characterisation of rock, microanalytical and isotopic reference materials, including a précis of recent changes and revisions to ISO guidelines for reference material characterisation and reporting. Selected reports are provided of isotope ratio analyses by both solution-nebulisation MC-ICP-MS and laser ablation-ICP-MS, as well as of radioactive isotope geochronology by LA-ICP-MS. Most of the analytical techniques elaborated continue to provide new applications for geochemical analysis, however it is noted that instrumental neutron activation analysis has become less popular in recent years, mostly due to the reduced availability of nuclear reactors to act as a neutron source. Many of the newer applications reported here provide analysis at increasingly finer resolution. Examples include atom probe tomography, a very sensitive method providing atomic scale information, nanoscale SIMS, for isotopic imaging of geological and biological samples, and micro-XRF, which has a spatial resolution many orders of magnitude smaller than conventional XRF

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“… Nanne et al (2017) described high-precision MC-ICP-MS and N-TIMS Os isotope ratio measurement methods using a 188 Os- 190 Os double spike technique. More recently, Zhu et al (2018) provided a new mass fractionation correction method for MC-ICP-MS to determine the absolute Os isotope ratios which does not rely on Nier’s values ( 192 Os/ 188 Os = 3.083, Nier, 1937 ).…”

Section: Stable Isotope Ratio Measurements For Re and Pgementioning

confidence: 99%

Analytical Methods for Os Isotope Ratios and Re-PGE Mass Fractions in Geological Samples

Chu

2021

Front. Chem.

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The recent advances in analytical methods of Re-Os and PGE in geological materials including sample dissolution, chemical separation, mass spectrometric determinations, as well as the developments of matrix-matched reference materials for data quality control are thoroughly reviewed. Further, the in-situ measurement methods for Re-PGE mass fractions and 187Os/188Os ratios, as well as the measurement methods for stable isotope ratios of Re and PGE are also briefly reviewed. This review stands as a comprehensive reference for researchers to consider in the development of measurement methods for Re-PGE mass fractions and 187Os/188Os ratios in geological materials.

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High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS

Abstract: we have applied a two-step correction, where in step one a starting oxygen composition is used in order to determine the "true" oxygen isotope composition of the particular measurement. For the first step we have used the compositions as determined by Luguet et al. (2008)

Cited by 24 publications

References 73 publications

Melt chemistry and redox conditions control titanium isotope fractionation during magmatic differentiation

Melt chemistry and redox conditions control titanium isotope fractionation during magmatic differentiation

GGR Biennial Critical Review: Analytical Developments Since 2014

Analytical Methods for Os Isotope Ratios and Re-PGE Mass Fractions in Geological Samples

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