Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry

Michael Storey, Tiffany Rivera, Stephanie Flude

    Research output: Contribution to conferenceConference abstract for conferenceResearch

    Abstract

    New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating.

    Here we report analytical protocols and age cross-calibration studies using a NU-Instruments multi-collector Noblesse noble gas mass spectrometer configured with a faraday detector and three ion-counting electron multipliers. The instrument has the capability to measure several noble gas isotopes simultaneously and to change measurement configurations instantaneously by the use of QUAD lenses (zoom optics). The Noblesse offer several advantages over previous generation noble gas mass spectrometers and is particularly suited for single crystal 40Ar/39Ar dating because of: (i) improved source sensitivity (ii) ion-counting electron multipliers, which have much lower signal to noise ratios than analog enabling precise measurement of very small 36Ar signals for accurate correction for atmospheric-derived 40Ar; (iii) higher mass resolution allows pseudo resolution of hydrocarbon isobaric interferences from 36Ar through to 40Ar; (iv) multi-collection, allowing more data to be gathered in a fixed time in comparison with single-collector peak-switching measurements; (v) a dedicated detector for radioactive 37Ar.

    Our cross-calibration experiments indicate high-resolution, multi-collector, noble gas mass spectrometers can facilitate an improvement in accuracy and precision of 40Ar/39Ar dates compared to previous generation single collector instruments, in ideal cases the ages approaching the ± 0.1% goal of EARTHTIME.
    Original languageEnglish
    Publication date2011
    Publication statusPublished - 2011
    EventAGU Fall Meeting 2011 - San Francisco, United States
    Duration: 9 Sep 20119 Sep 2011
    http://sites.agu.org/fallmeeting/

    Conference

    ConferenceAGU Fall Meeting 2011
    CountryUnited States
    CitySan Francisco
    Period09/09/201109/09/2011
    Internet address

    Cite this

    Storey, M., Rivera, T., & Flude, S. (2011). Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry. Abstract from AGU Fall Meeting 2011, San Francisco, United States.
    Storey, Michael ; Rivera, Tiffany ; Flude, Stephanie. / Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry. Abstract from AGU Fall Meeting 2011, San Francisco, United States.
    @conference{f32b831e83cd481aa5859155770b9ad5,
    title = "Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry",
    abstract = "New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating.Here we report analytical protocols and age cross-calibration studies using a NU-Instruments multi-collector Noblesse noble gas mass spectrometer configured with a faraday detector and three ion-counting electron multipliers. The instrument has the capability to measure several noble gas isotopes simultaneously and to change measurement configurations instantaneously by the use of QUAD lenses (zoom optics). The Noblesse offer several advantages over previous generation noble gas mass spectrometers and is particularly suited for single crystal 40Ar/39Ar dating because of: (i) improved source sensitivity (ii) ion-counting electron multipliers, which have much lower signal to noise ratios than analog enabling precise measurement of very small 36Ar signals for accurate correction for atmospheric-derived 40Ar; (iii) higher mass resolution allows pseudo resolution of hydrocarbon isobaric interferences from 36Ar through to 40Ar; (iv) multi-collection, allowing more data to be gathered in a fixed time in comparison with single-collector peak-switching measurements; (v) a dedicated detector for radioactive 37Ar.Our cross-calibration experiments indicate high-resolution, multi-collector, noble gas mass spectrometers can facilitate an improvement in accuracy and precision of 40Ar/39Ar dates compared to previous generation single collector instruments, in ideal cases the ages approaching the ± 0.1{\%} goal of EARTHTIME.",
    author = "Michael Storey and Tiffany Rivera and Stephanie Flude",
    year = "2011",
    language = "English",
    note = "AGU Fall Meeting 2011 ; Conference date: 09-09-2011 Through 09-09-2011",
    url = "http://sites.agu.org/fallmeeting/",

    }

    Storey, M, Rivera, T & Flude, S 2011, 'Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry' AGU Fall Meeting 2011, San Francisco, United States, 09/09/2011 - 09/09/2011, .

    Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry. / Storey, Michael; Rivera, Tiffany; Flude, Stephanie.

    2011. Abstract from AGU Fall Meeting 2011, San Francisco, United States.

    Research output: Contribution to conferenceConference abstract for conferenceResearch

    TY - ABST

    T1 - Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry

    AU - Storey, Michael

    AU - Rivera, Tiffany

    AU - Flude, Stephanie

    PY - 2011

    Y1 - 2011

    N2 - New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating.Here we report analytical protocols and age cross-calibration studies using a NU-Instruments multi-collector Noblesse noble gas mass spectrometer configured with a faraday detector and three ion-counting electron multipliers. The instrument has the capability to measure several noble gas isotopes simultaneously and to change measurement configurations instantaneously by the use of QUAD lenses (zoom optics). The Noblesse offer several advantages over previous generation noble gas mass spectrometers and is particularly suited for single crystal 40Ar/39Ar dating because of: (i) improved source sensitivity (ii) ion-counting electron multipliers, which have much lower signal to noise ratios than analog enabling precise measurement of very small 36Ar signals for accurate correction for atmospheric-derived 40Ar; (iii) higher mass resolution allows pseudo resolution of hydrocarbon isobaric interferences from 36Ar through to 40Ar; (iv) multi-collection, allowing more data to be gathered in a fixed time in comparison with single-collector peak-switching measurements; (v) a dedicated detector for radioactive 37Ar.Our cross-calibration experiments indicate high-resolution, multi-collector, noble gas mass spectrometers can facilitate an improvement in accuracy and precision of 40Ar/39Ar dates compared to previous generation single collector instruments, in ideal cases the ages approaching the ± 0.1% goal of EARTHTIME.

    AB - New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating.Here we report analytical protocols and age cross-calibration studies using a NU-Instruments multi-collector Noblesse noble gas mass spectrometer configured with a faraday detector and three ion-counting electron multipliers. The instrument has the capability to measure several noble gas isotopes simultaneously and to change measurement configurations instantaneously by the use of QUAD lenses (zoom optics). The Noblesse offer several advantages over previous generation noble gas mass spectrometers and is particularly suited for single crystal 40Ar/39Ar dating because of: (i) improved source sensitivity (ii) ion-counting electron multipliers, which have much lower signal to noise ratios than analog enabling precise measurement of very small 36Ar signals for accurate correction for atmospheric-derived 40Ar; (iii) higher mass resolution allows pseudo resolution of hydrocarbon isobaric interferences from 36Ar through to 40Ar; (iv) multi-collection, allowing more data to be gathered in a fixed time in comparison with single-collector peak-switching measurements; (v) a dedicated detector for radioactive 37Ar.Our cross-calibration experiments indicate high-resolution, multi-collector, noble gas mass spectrometers can facilitate an improvement in accuracy and precision of 40Ar/39Ar dates compared to previous generation single collector instruments, in ideal cases the ages approaching the ± 0.1% goal of EARTHTIME.

    M3 - Conference abstract for conference

    ER -

    Storey M, Rivera T, Flude S. Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry. 2011. Abstract from AGU Fall Meeting 2011, San Francisco, United States.