Details
| Original language | English |
|---|---|
| Pages (from-to) | 311-328 |
| Number of pages | 18 |
| Journal | Geostandards and Geoanalytical Research |
| Volume | 38 |
| Issue number | 3 |
| Publication status | Published - 1 Sept 2014 |
Abstract
In this study, a technique for high precision in situ Fe and Mg isotope determinations by femtosecond-laser ablation-multi collector-ICP-MS (fs-LA-MC-ICP-MS) was developed. This technique was employed to determine reference values for a series of common reference glasses that may be used for external standardisation of in situ Fe and Mg isotope determinations in silicates. The analysed glasses are part of the MPI-DING and United States Geological Survey (USGS) reference glass series, consisting of basaltic (BIR-1G, BCR-2G, BHVO-2G, KL2-G, ML3B-G) and komatiitic (GOR128-G and GOR132-G) compositions. Their Fe and Mg isotope compositions were determined by in situ fs-LA-MC-ICP-MS and by conventional solution nebulisation multi-collector ICP-MS. We determined δ56Fe values for these glasses ranging between -0.04‰ and 0.10‰ (relative to IRMM-014) and δ26Mg values ranging between -0.40‰ and -0.15‰ (relative to DSM-3). Our fs-LA-MC-ICP-MS results for both Fe and Mg isotope compositions agreed with solution nebulisation analyses within analytical uncertainties. Furthermore, the results of three USGS reference glasses (BIR-1G, BHVO-2G and BCR-2G) agreed with previous results for powdered and dissolved aliquots of the same reference materials. Measurement reproducibilities of the in situ determinations of δ56Fe and δ26Mg values were usually better than 0.12‰ and 0.13‰ (2s), respectively. We further demonstrate that our technique is a suitable tool to resolve isotopic zoning in chemically-zoned olivine crystals. It may be used for a variety of different applications on isotopically-zoned minerals, e.g., in magmatic or metamorphic rocks or meteorites, to unravel their formation or cooling rates.
Keywords
- Geological reference materials, Iron, Laser ablation, Magnesium, Stable isotopes
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Research Area (based on ÖFOS 2012)
- NATURAL SCIENCES
- Geosciences
- Geology, Mineralogy
- Geochemistry
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In: Geostandards and Geoanalytical Research, Vol. 38, No. 3, 01.09.2014, p. 311-328.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-precision Fe and Mg isotope ratios of silicate reference glasses determined In Situ by femtosecond LA-MC-ICP-MS and by solution nebulisation MC-ICP-MS
AU - Oeser, Martin
AU - Weyer, Stefan
AU - Horn, Ingo
AU - Schuth, Stephan
N1 - Publisher Copyright: © 2014 International Association of Geoanalysts. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - In this study, a technique for high precision in situ Fe and Mg isotope determinations by femtosecond-laser ablation-multi collector-ICP-MS (fs-LA-MC-ICP-MS) was developed. This technique was employed to determine reference values for a series of common reference glasses that may be used for external standardisation of in situ Fe and Mg isotope determinations in silicates. The analysed glasses are part of the MPI-DING and United States Geological Survey (USGS) reference glass series, consisting of basaltic (BIR-1G, BCR-2G, BHVO-2G, KL2-G, ML3B-G) and komatiitic (GOR128-G and GOR132-G) compositions. Their Fe and Mg isotope compositions were determined by in situ fs-LA-MC-ICP-MS and by conventional solution nebulisation multi-collector ICP-MS. We determined δ56Fe values for these glasses ranging between -0.04‰ and 0.10‰ (relative to IRMM-014) and δ26Mg values ranging between -0.40‰ and -0.15‰ (relative to DSM-3). Our fs-LA-MC-ICP-MS results for both Fe and Mg isotope compositions agreed with solution nebulisation analyses within analytical uncertainties. Furthermore, the results of three USGS reference glasses (BIR-1G, BHVO-2G and BCR-2G) agreed with previous results for powdered and dissolved aliquots of the same reference materials. Measurement reproducibilities of the in situ determinations of δ56Fe and δ26Mg values were usually better than 0.12‰ and 0.13‰ (2s), respectively. We further demonstrate that our technique is a suitable tool to resolve isotopic zoning in chemically-zoned olivine crystals. It may be used for a variety of different applications on isotopically-zoned minerals, e.g., in magmatic or metamorphic rocks or meteorites, to unravel their formation or cooling rates.
AB - In this study, a technique for high precision in situ Fe and Mg isotope determinations by femtosecond-laser ablation-multi collector-ICP-MS (fs-LA-MC-ICP-MS) was developed. This technique was employed to determine reference values for a series of common reference glasses that may be used for external standardisation of in situ Fe and Mg isotope determinations in silicates. The analysed glasses are part of the MPI-DING and United States Geological Survey (USGS) reference glass series, consisting of basaltic (BIR-1G, BCR-2G, BHVO-2G, KL2-G, ML3B-G) and komatiitic (GOR128-G and GOR132-G) compositions. Their Fe and Mg isotope compositions were determined by in situ fs-LA-MC-ICP-MS and by conventional solution nebulisation multi-collector ICP-MS. We determined δ56Fe values for these glasses ranging between -0.04‰ and 0.10‰ (relative to IRMM-014) and δ26Mg values ranging between -0.40‰ and -0.15‰ (relative to DSM-3). Our fs-LA-MC-ICP-MS results for both Fe and Mg isotope compositions agreed with solution nebulisation analyses within analytical uncertainties. Furthermore, the results of three USGS reference glasses (BIR-1G, BHVO-2G and BCR-2G) agreed with previous results for powdered and dissolved aliquots of the same reference materials. Measurement reproducibilities of the in situ determinations of δ56Fe and δ26Mg values were usually better than 0.12‰ and 0.13‰ (2s), respectively. We further demonstrate that our technique is a suitable tool to resolve isotopic zoning in chemically-zoned olivine crystals. It may be used for a variety of different applications on isotopically-zoned minerals, e.g., in magmatic or metamorphic rocks or meteorites, to unravel their formation or cooling rates.
KW - Geological reference materials
KW - Iron
KW - Laser ablation
KW - Magnesium
KW - Stable isotopes
UR - http://www.scopus.com/inward/record.url?scp=84908011520&partnerID=8YFLogxK
U2 - 10.1111/j.1751-908x.2014.00288.x
DO - 10.1111/j.1751-908x.2014.00288.x
M3 - Article
AN - SCOPUS:84908011520
VL - 38
SP - 311
EP - 328
JO - Geostandards and Geoanalytical Research
JF - Geostandards and Geoanalytical Research
SN - 1639-4488
IS - 3
ER -