Skip to content

Research at St Andrews

Matrix effects on the relative sensitivity factors for manganese and chromium during ion microprobe analysis of carbonate: implications for early Solar System chronology

Research output: Contribution to journalArticlepeer-review

Author(s)

Robert C. J. Steele, Veronika S. Heber, Kevin D. McKeegan

School/Research organisations

Abstract

The short-lived radionuclide 53Mn decays to 53Cr providing a relative chronometer for dating the formation of Mn-rich minerals in meteorites. Secondary ion mass spectrometry (SIMS) has been extensively used for in situ dating of meteoritic olivine and carbonate by the 53Mn"–" 53Cr system, however a significant analytical challenge has been realising accurate measurements of the Mn/Cr ratio in individual minerals of differing chemical compositions. During SIMS analysis, elements are ionised with differing efficiencies and standard materials are required to calibrate measured ion intensities in terms of relative elemental concentrations. The carbonate system presents a particular analytical difficulty since such standards are not naturally available due to low and variable Cr contents. Here, we utilise ion implantation of Cr into carbonate and other phases to accurately determine the relative sensitivity factors of Mn/Cr during SIMS analysis. We find significant variations in Mn/Cr RSF values among different carbonate minerals that depend systematically on chemical composition and we propose an empirical correction scheme that quantitatively yields an accurate RSF for carbonates of diverse chemical compositions. Correction of SIMS carbonate data for this strong matrix effect may help to reconcile some outstanding problems regarding the timescales of aqueous alteration processes in carbonaceous chondrites. Mn–Cr ages, revised based our new understanding of the matrix effect, are, in general, earlier than previously thought and the duration of carbonate formation is shorter.
Close

Details

Original languageEnglish
Pages (from-to)245-259
Number of pages15
JournalGeochimica et Cosmochimica Acta
Volume201
Early online date5 Nov 2016
DOIs
Publication statusPublished - 15 Mar 2017

    Research areas

  • Early Solar System chronology, 53Mn, Cr isotopes, Secondary ion mass spectrometry, Relative sensitivity factor, Matrix effect

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Elemental abundances of major elements in the solar wind as measured in Genesis targets and implications on solar wind fractionation

    Heber, V., McKeegan, K., Steele, R. C. J., Jurewicz, A., Rieck, K., Guan, Y., Wieler, R. & Burnett, D. S., 20 Jan 2021, In: Astrophysical Journal. 907, 1, 15.

    Research output: Contribution to journalArticlepeer-review

  2. Nucleosynthetic heterogeneities in meteorites

    Steele, R. C. J., 17 Sep 2020, Reference Module in Earth Systems and Environmental Sciences. Elsevier Inc.

    Research output: Chapter in Book/Report/Conference proceedingChapter

  3. The Stubenberg meteorite—An LL6 chondrite fragmental breccia recovered soon after precise prediction of the strewn field

    Bischoff, A., Barrat, J-A., Bauer, K., Burkhardt, C., Busemann, H., Ebert, S., Gonsior, M., Hakenmüller, J., Haloda, J., Harries, D., Heinlein, D., Hiesinger, H., Hochleitner, R., Hoffmann, V., Kaliwoda, M., Laubenstein, M., Maden, C., Meier, M. M. M., Morlok, A., Pack, A. & 6 others, Ruf, A., Schmitt-Kopplin, P., Schönbächler, M., Steele, R. C. J., Spurný, P. & Wimmer, K., 2 Aug 2017, In: Meteoritics & Planetary Science. 52, 8, p. 1683-1703

    Research output: Contribution to journalArticlepeer-review

  4. The isotope geochemistry of Ni

    Elliott, T. & Steele, R. C. J., 1 Jan 2017, In: Reviews in Mineralogy and Geochemistry. 82, 1, p. 511-542 31 p.

    Research output: Contribution to journalReview articlepeer-review

Related by journal

  1. Experiments quantifying elemental and isotopic fractionations during evaporation of CAI-like melts in low-pressure hydrogen and in vacuum: Constraints on thermal processing of CAI in the protoplanetary disk

    Mendybaev, R. A., Kamibayashi, M., Teng, F-Z., Savage, P. S., Bastian Georg, R., Richter, F. M. & Tachibana, S., 1 Jan 2021, In: Geochimica et Cosmochimica Acta. 292, p. 557-576

    Research output: Contribution to journalArticlepeer-review

  2. Sulfate sulfur isotopes and major ion chemistry reveal that pyrite oxidation counteracts CO2 drawdown from silicate weathering in the Langtang-Trisuli-Narayani River system, Nepal Himalaya

    Kemeny, P. C., Lopez, G. I., Dalleska, N. F., Torres, M., Burke, A., Bhatt, M. P., West, A. J., Hartmann, J. & Adkins, J. F., 1 Feb 2021, In: Geochimica et Cosmochimica Acta. 294, p. 43-69

    Research output: Contribution to journalArticlepeer-review

  3. Incorporation of minor and trace elements into cultured brachiopods: implications for proxy application with new insights from a biomineralisation model

    Jurikova, H., Ippach, M., Liebetrau, V., Gutjahr, M., Krause, S., Büsse, S., Gorb, S. N., Henkel, D., Hiebenthal, C., Schmidt, M., Leipe, T., Laudien, J. & Eisenhauer, A., 1 Oct 2020, In: Geochimica et Cosmochimica Acta. 286, p. 418-440 23 p.

    Research output: Contribution to journalArticlepeer-review

  4. The sulfur isotope evolution of magmatic-hydrothermal fluids: insights into ore-forming processes

    Hutchison, W., Finch, A. A. & Boyce, A. J., 1 Nov 2020, In: Geochimica et Cosmochimica Acta. 288, p. 176-198

    Research output: Contribution to journalArticlepeer-review

  5. Trace and major element incorporation into amorphous calcium carbonate (ACC) precipitated from seawater

    Evans, D., Gray, W. R., Rae, J. W. B., Greenop, R., Webb, P. B., Penkman, K., Kroger, R. & Allison, N., 9 Sep 2020, In: Geochimica et Cosmochimica Acta. In press

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Geochimica et Cosmochimica Acta (Journal)

    Anouk Margaretha Borst (Reviewer)

    15 Jul 2020

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

ID: 255735828

Top