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Preliminary matrix bias calibrations for ion microprobe oxygen isotope analysis of pyroxene.

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Title: Preliminary matrix bias calibrations for ion microprobe oxygen isotope analysis of pyroxene.
Authors: Fu, Bin1,2 (AUTHOR) mbinfu@hotmail.com
Source: JAAS (Journal of Analytical Atomic Spectrometry). Apr2026, Vol. 41 Issue 4, p1468-1479. 12p.
Subjects: Pyroxene, Oxygen isotopes, Secondary ion mass spectrometry, Igneous rocks, Metamorphic rocks
Abstract: Similar to garnet or olivine, pyroxene commonly occurs in diverse igneous and metamorphic rocks such as peridotites, eclogites, skarns and meteorites. Its oxygen isotope compositions can be analysed in situ using secondary ion mass spectrometry (SIMS) or an ion microprobe to help constrain the formation of rocks. However, unlike garnet and olivine, calibration of matrix-induced oxygen isotope (18O/16O) discrimination in pyroxene is not fully established, limiting its wide application in Earth and planetary sciences. This study provides preliminary matrix bias calibrations using 51 reference materials and/or samples of pyroxene, either low-Ca or high-Ca, including omphacite and jadeite, some (18) of which have also been analysed here by laser fluorination isotope ratio mass spectrometry. Both conventional offline (bias δ18O vs. mole fractions of ferrosilite or jadeite endmembers: XFs or XJd) and online (bias δ18O vs.56Fe16O/16O) calibration methods can be applicable, including the first matrix bias estimation for jadeitic clinopyroxene or omphacite as well as Mn-rich pyroxene. Investigation is needed for intermediate-Ca, particularly Ti-rich pyroxene. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 193065221
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Preliminary matrix bias calibrations for ion microprobe oxygen isotope analysis of pyroxene.
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  Data: <searchLink fieldCode="AR" term="%22Fu%2C+Bin%22">Fu, Bin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> mbinfu@hotmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22JAAS+%28Journal+of+Analytical+Atomic+Spectrometry%29%22">JAAS (Journal of Analytical Atomic Spectrometry)</searchLink>. Apr2026, Vol. 41 Issue 4, p1468-1479. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Pyroxene%22">Pyroxene</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+isotopes%22">Oxygen isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Secondary+ion+mass+spectrometry%22">Secondary ion mass spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Igneous+rocks%22">Igneous rocks</searchLink><br /><searchLink fieldCode="DE" term="%22Metamorphic+rocks%22">Metamorphic rocks</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Similar to garnet or olivine, pyroxene commonly occurs in diverse igneous and metamorphic rocks such as peridotites, eclogites, skarns and meteorites. Its oxygen isotope compositions can be analysed in situ using secondary ion mass spectrometry (SIMS) or an ion microprobe to help constrain the formation of rocks. However, unlike garnet and olivine, calibration of matrix-induced oxygen isotope (18O/16O) discrimination in pyroxene is not fully established, limiting its wide application in Earth and planetary sciences. This study provides preliminary matrix bias calibrations using 51 reference materials and/or samples of pyroxene, either low-Ca or high-Ca, including omphacite and jadeite, some (18) of which have also been analysed here by laser fluorination isotope ratio mass spectrometry. Both conventional offline (bias δ18O vs. mole fractions of ferrosilite or jadeite endmembers: XFs or XJd) and online (bias δ18O vs.56Fe16O/16O) calibration methods can be applicable, including the first matrix bias estimation for jadeitic clinopyroxene or omphacite as well as Mn-rich pyroxene. Investigation is needed for intermediate-Ca, particularly Ti-rich pyroxene. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1039/d5ja00491h
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 1468
    Subjects:
      – SubjectFull: Pyroxene
        Type: general
      – SubjectFull: Oxygen isotopes
        Type: general
      – SubjectFull: Secondary ion mass spectrometry
        Type: general
      – SubjectFull: Igneous rocks
        Type: general
      – SubjectFull: Metamorphic rocks
        Type: general
    Titles:
      – TitleFull: Preliminary matrix bias calibrations for ion microprobe oxygen isotope analysis of pyroxene.
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 41
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              Value: 4
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