Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions
Abstract Marine shells incorporate oxygen isotope signatures during growth, creating valuable records of seawater temperature and marine oxygen isotopic compositions. Secondary ion mass spectrometry (SIMS) measures these compositions in situ at finer length‐scales than traditional stable isotope ana...
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Wiley
2024-11-01
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| Series: | Geochemistry, Geophysics, Geosystems |
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| Online Access: | https://doi.org/10.1029/2024GC011577 |
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| author | Oliver M. Medd Laura M. Otter Ian S. Williams Richard A. Stern Michael W. Förster Stephen M. Eggins Laura Rodriguez‐Sanz Nerilie J. Abram Miaohong He Michael J. Ellwood Jessica A. Hargreaves Stewart J. Fallon Brett M. Knowles |
| author_facet | Oliver M. Medd Laura M. Otter Ian S. Williams Richard A. Stern Michael W. Förster Stephen M. Eggins Laura Rodriguez‐Sanz Nerilie J. Abram Miaohong He Michael J. Ellwood Jessica A. Hargreaves Stewart J. Fallon Brett M. Knowles |
| author_sort | Oliver M. Medd |
| collection | DOAJ |
| description | Abstract Marine shells incorporate oxygen isotope signatures during growth, creating valuable records of seawater temperature and marine oxygen isotopic compositions. Secondary ion mass spectrometry (SIMS) measures these compositions in situ at finer length‐scales than traditional stable isotope analyses. However, determining oxygen isotope ratios in aragonite, the most common shell mineral, is hampered by a lack of ideal reference materials, limiting the accuracy of SIMS‐based seawater temperature reconstructions. Here, we tested the capability of SIMS to produce seawater temperature reconstructions despite the matrix calibration challenges associated with aragonite. We cultured Anadara trapezia bivalves at four controlled seawater temperatures (13–28°C) and used strontium labeling to mark the start of the temperature‐controlled shell increment, allowing for more spatially precise SIMS analysis. An improved matrix calibration was developed to ensure more accurate bio‐aragonite analyses that addressed matrix differences between the pure abiotic reference materials and the bio‐aragonite samples with intricate mineral‐organic architectures and distinct minor and trace element compositions. We regressed SIMS‐IRMS biases of abiotic and biogenic aragonites that account for their systematic differences in major, minor, and trace elements, allowing for more accurate SIMS analyses of the temperature‐controlled shell increment. The thorough matrix calibration allowed us to provide a SIMS‐based seawater‐corrected oxygen isotope thermometer of T(°C) = 23.05 ± 0.36 − 4.48 · (δ18Oaragonite [‰ VPDB] − δ18Oseawater [‰ VSMOW] ± 0.25) and 103lnαaragonite‐seawater = (17.78 ± 0.88) · 103/T (K) − (29.44 ± 2.40) that agrees with existing aragonitic IRMS‐based thermometer relationships and improves the applicability of SIMS‐based paleo‐environmental reconstructions of marine bio‐aragonites. |
| format | Article |
| id | doaj-art-71c67074e89848e4a5f8337fc24ded98 |
| institution | Kabale University |
| issn | 1525-2027 |
| language | English |
| publishDate | 2024-11-01 |
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| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-71c67074e89848e4a5f8337fc24ded982024-11-27T12:26:38ZengWileyGeochemistry, Geophysics, Geosystems1525-20272024-11-012511n/an/a10.1029/2024GC011577Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature ReconstructionsOliver M. Medd0Laura M. Otter1Ian S. Williams2Richard A. Stern3Michael W. Förster4Stephen M. Eggins5Laura Rodriguez‐Sanz6Nerilie J. Abram7Miaohong He8Michael J. Ellwood9Jessica A. Hargreaves10Stewart J. Fallon11Brett M. Knowles12Research School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaState Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou ChinaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaResearch School of Earth Sciences Australian National University Canberra ACT AustraliaAbstract Marine shells incorporate oxygen isotope signatures during growth, creating valuable records of seawater temperature and marine oxygen isotopic compositions. Secondary ion mass spectrometry (SIMS) measures these compositions in situ at finer length‐scales than traditional stable isotope analyses. However, determining oxygen isotope ratios in aragonite, the most common shell mineral, is hampered by a lack of ideal reference materials, limiting the accuracy of SIMS‐based seawater temperature reconstructions. Here, we tested the capability of SIMS to produce seawater temperature reconstructions despite the matrix calibration challenges associated with aragonite. We cultured Anadara trapezia bivalves at four controlled seawater temperatures (13–28°C) and used strontium labeling to mark the start of the temperature‐controlled shell increment, allowing for more spatially precise SIMS analysis. An improved matrix calibration was developed to ensure more accurate bio‐aragonite analyses that addressed matrix differences between the pure abiotic reference materials and the bio‐aragonite samples with intricate mineral‐organic architectures and distinct minor and trace element compositions. We regressed SIMS‐IRMS biases of abiotic and biogenic aragonites that account for their systematic differences in major, minor, and trace elements, allowing for more accurate SIMS analyses of the temperature‐controlled shell increment. The thorough matrix calibration allowed us to provide a SIMS‐based seawater‐corrected oxygen isotope thermometer of T(°C) = 23.05 ± 0.36 − 4.48 · (δ18Oaragonite [‰ VPDB] − δ18Oseawater [‰ VSMOW] ± 0.25) and 103lnαaragonite‐seawater = (17.78 ± 0.88) · 103/T (K) − (29.44 ± 2.40) that agrees with existing aragonitic IRMS‐based thermometer relationships and improves the applicability of SIMS‐based paleo‐environmental reconstructions of marine bio‐aragonites.https://doi.org/10.1029/2024GC011577SIMSproxy archivesbiomineralsaquaculturestable isotopespaleoclimatology |
| spellingShingle | Oliver M. Medd Laura M. Otter Ian S. Williams Richard A. Stern Michael W. Förster Stephen M. Eggins Laura Rodriguez‐Sanz Nerilie J. Abram Miaohong He Michael J. Ellwood Jessica A. Hargreaves Stewart J. Fallon Brett M. Knowles Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions Geochemistry, Geophysics, Geosystems SIMS proxy archives biominerals aquaculture stable isotopes paleoclimatology |
| title | Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions |
| title_full | Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions |
| title_fullStr | Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions |
| title_full_unstemmed | Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions |
| title_short | Matrix Corrected SIMS In Situ Oxygen Isotope Analyses of Marine Shell Aragonite for High Resolution Seawater Temperature Reconstructions |
| title_sort | matrix corrected sims in situ oxygen isotope analyses of marine shell aragonite for high resolution seawater temperature reconstructions |
| topic | SIMS proxy archives biominerals aquaculture stable isotopes paleoclimatology |
| url | https://doi.org/10.1029/2024GC011577 |
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