&lt;i&gt;In situ&lt;/i&gt; analyses of hydrogen and sulfur isotope ratios in basaltic glass using SIMS

Shimizu, Kenji; Ushikubo, T.; Murai, Tomokazu; Matsu'ura, Fumihiro; Ueno, Yuichiro

doi:10.2343/geochemj.2.0559

Cited by 7 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The details of the analytical procedures, including sample preparation, analytical conditions, and standard data, are provided in Refs. 20 , 21 and “ Methods ”. The volatile and major elemental compositions and the δD‰ values of the melt inclusions are listed in Supplementary Table S2 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Tracing the subducting Pacific slab to the mantle transition zone with hydrogen isotopes

Kuritani

Shimizu

Ushikubo

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Hydrogen isotopes have been widely used as powerful tracers to understand the origin of terrestrial water and the water circulation between the surface and the deep interior of the Earth. However, further quantitative understanding is hindered due to a lack of observations about the changes in D/H ratios of a slab during subduction. Here, we report hydrogen isotope data of olivine-hosted melt inclusions from active volcanoes with variable depths (90‒550 km) to the subducting Pacific slab. The results show that the D/H ratio of the slab fluid at the volcanic front is lower than that of the slab fluid just behind the volcanic front. This demonstrates that fluids with different D/H ratios were released from the crust and the underlying peridotite portions of the slab around the volcanic front. The results also show that the D/H ratios of slab fluids do not change significantly with slab depths from 300 to 550 km, which demonstrates that slab dehydration did not occur significantly beyond the arc. Our estimated δD‰ value for the slab materials that accumulated in the mantle transition zone is > − 90‰, a value which is significantly higher than previous estimates.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The same microprobe as above was used, and a method described in Ref. 21 was followed. We used a 20 keV Cs + ion beam of ~ 5 nA defocused to ~ 15 µm in diameter.…”

Section: Methodsmentioning

confidence: 99%

Tracing the subducting Pacific slab to the mantle transition zone with hydrogen isotopes

Kuritani

Shimizu

Ushikubo

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Secondary ion mass spectrometry (SIMS) is an in situ micro−analytical technique combining high spatial resolution with high sensitivity that is particularly well suited for determining the concentrations and isotopic compositions of light elements (H, Li, B, C, N, O, S) while overcoming many of the challenges involved with bulk analyses. Despite extensive efforts to analyze the isotopic compositions of volatiles in volcanic glasses such as hydrogen (e.g., Hauri et al, 2002Hauri et al, , 2006, sulfur (e.g., Shimizu et al, 2019), and chlorine (e.g., Layne et al, 2004) by the latest generation of SIMS, carbon isotopes have been largely ignored following earlier attempts (Hauri et al, 2002) due to its high background signal (e.g., Ihinger et al, 1994). In addition, the matrix effect for carbon isotope that affects the accuracy of SIMS measurements (e.g., Hauri et al, 2002) remains largely unexplored.…”

Section: Introductionmentioning

confidence: 99%

High–precision determination of carbon stable isotope in silicate glasses by secondary ion mass spectrometry: Evaluation of international standards

Lee,

Moussallam,

Rose-Koga

et al. 2024

Preprint

View full text Add to dashboard Cite

Secondary ion mass spectrometry (SIMS) has been used for isotope analysis of volatile components dissolved in silicate melts for decades. However, carbon in situ stable isotope analysis in natural silicate glasses has remained particularly challenging, with the few published attempts yielding high uncertainties. In this context, we characterized 31 reference silicate glasses of basaltic and basanitic compositions, which we then used as standards to calibrate δ13C-value analyses in silicate glasses by SIMS. This set of standards covers a wide range of CO2 concentrations (380 ppm − 12000 ppm) and δ13C values (−28.1±0.2 to −1.1±0.2 ‰, ±1). The standard sets were analyzed using large−geometry SIMS at two ion microprobe facilities to test reproducibility across different instrumental setups. The instrumental mass fractionation (IMF) varied widely with two different large−geometry SIMS instruments as well as with different analytical parameters such as field aperture size and primary beam intensity. We found that a precision better than ±1.1 ‰ (both average internal and external precision, ±1σ) could be achieved using a primary beam intensity of less than 5 nA, resulting in a final spot size of 10–20 µm, allowing precise analysis of δ13C in mineral−hosted melt inclusions. This level of precision was achieved at CO2 concentrations as low as 1800 ppm. This advance opens a wide range of new possibilities for the study of δ13C-value in mafic melts and their mantle sources. The reference glasses are now available at the CNRS–CRPG ion microprobe facility in Nancy, France and will be deposited at the Smithsonian National Museum of Natural History, Washington, USA where they will be freely available on loan to any researcher (catalogue numbers will be available for the final version of this manuscript).

show abstract

Isotope Fractionation Processes of Selected Elements

Hoefs¹

2021

Springer Textbooks in Earth Sciences, Geography and Environment

View full text Add to dashboard Cite

<i>In situ</i> analyses of hydrogen and sulfur isotope ratios in basaltic glass using SIMS

Cited by 7 publications

References 33 publications

Tracing the subducting Pacific slab to the mantle transition zone with hydrogen isotopes

Tracing the subducting Pacific slab to the mantle transition zone with hydrogen isotopes

High–precision determination of carbon stable isotope in silicate glasses by secondary ion mass spectrometry: Evaluation of international standards

Isotope Fractionation Processes of Selected Elements

Contact Info

Product

Resources

About