High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS
Ninety-seven high precision, high spatial-resolution ion microprobe analyses of oxygen isotopes in a single, large zircon crystal from a lunar soil sample yield a surprising and unexpectedly large range in δ18OSMOW from 4.5 to 9.2%. Detailed consideration of sample mounting, polishing, and sample-st...
| Main Authors: | , |
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| Format: | Journal Article |
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Elsevier Science BV
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/8939 |
| _version_ | 1848745805806043136 |
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| author | Whitehouse, M. Nemchin, Alexander |
| author_facet | Whitehouse, M. Nemchin, Alexander |
| author_sort | Whitehouse, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Ninety-seven high precision, high spatial-resolution ion microprobe analyses of oxygen isotopes in a single, large zircon crystal from a lunar soil sample yield a surprising and unexpectedly large range in δ18OSMOW from 4.5 to 9.2%. Detailed consideration of sample mounting, polishing, and sample-standard orientation suggests that this variation was caused by analytical artefact(s) degrading the accuracy of δ18O values. Careful control of these parameters effectively eliminated the variation and the two most reliable sets of analyses, obtained when the sample and standard were mounted within 2 mm in the centre of the mount, yield a combined weighted average δ18OSMOW value of 5.70 ± 0.07% (95% confidence). This value is indistinguishable from bulk rock analyses of low-Ti lunar basalts and suggests that, at least under anhydrous conditions, there is minimal fractionation accompanying zircon crystallisation. |
| first_indexed | 2025-11-14T06:23:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-8939 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:23:12Z |
| publishDate | 2008 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-89392017-09-13T16:06:25Z High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS Whitehouse, M. Nemchin, Alexander Oxygen isotopes Ion microprobe Moon Zircon Ninety-seven high precision, high spatial-resolution ion microprobe analyses of oxygen isotopes in a single, large zircon crystal from a lunar soil sample yield a surprising and unexpectedly large range in δ18OSMOW from 4.5 to 9.2%. Detailed consideration of sample mounting, polishing, and sample-standard orientation suggests that this variation was caused by analytical artefact(s) degrading the accuracy of δ18O values. Careful control of these parameters effectively eliminated the variation and the two most reliable sets of analyses, obtained when the sample and standard were mounted within 2 mm in the centre of the mount, yield a combined weighted average δ18OSMOW value of 5.70 ± 0.07% (95% confidence). This value is indistinguishable from bulk rock analyses of low-Ti lunar basalts and suggests that, at least under anhydrous conditions, there is minimal fractionation accompanying zircon crystallisation. 2008 Journal Article http://hdl.handle.net/20.500.11937/8939 10.1016/j.chemgeo.2008.09.009 Elsevier Science BV restricted |
| spellingShingle | Oxygen isotopes Ion microprobe Moon Zircon Whitehouse, M. Nemchin, Alexander High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title | High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title_full | High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title_fullStr | High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title_full_unstemmed | High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title_short | High precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by SIMS |
| title_sort | high precision, high accuracy measurement of oxygen isotopes in a large lunar zircon by sims |
| topic | Oxygen isotopes Ion microprobe Moon Zircon |
| url | http://hdl.handle.net/20.500.11937/8939 |