Experimental evidence for the pressure dependence of fission track annealing in apatite.
Published: 05 Feb 1903 Created: 07 Nov 2024 Revised: 07 Nov 2024

The pressure experiments reported by Wendt et al. are cast in such a way as to question the fundamental basis underpinning apatite fission track thermochronology, implying the possibility of a large systematic error in previous interpretations. We...

The pressure experiments reported by Wendt et al. are cast in such a way as to question the fundamental basis underpinning apatite fission track thermochronology, implying the possibility of a large systematic error in previous interpretations. We find however, that the study is severely compromised by fundamental errors in both experimental design and execution, as well as lacking in consideration of a substantial body of previous work in the area of fission track annealing studies. Wendt et al. have not attempted to extrapolate the results of their experiments to geologically relevant heating times and temperatures. This has been the fundamental test that all previous annealing models have had to pass. Their study clearly fails this test. Moreover, if significant pressure dependence does exist then it is implicit in existing, deep borehole-consistent annealing models. Whilst such models are interpolated in terms of temperature, the borehole test means that they also accommodate any other factors, which correlate with temperature, including pressure. The implications of the results reported by Wendt et al. have been overstated. Far from being ‘‘intimidating’’, we find that they have little relevance either to previous studies of apatite fission track annealing and extrapolations based on them, or to the routine application of fission track analysis to elucidate thermal history information under geological conditions.

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Record No mesac28346
Topic Geoscientific Information
Type of Resource Document
Category Type Earth Sciences
Document Type Departmental Publication - Other
Contributor School of Earth Sciences, Uni of Melbourne;Geotrack International
Sponsor
Tenement
Tenement Holder
Operator
Geological Province Otway Basin
Mine Name
Stratigraphy
Commodity
    Notes
    Geographic Locality: Otway Basin;New Mexico
    Doc No: Ext 00128

    Geographic Locality: Otway Basin;New Mexico Doc No: Ext 00128

    Language English
    Metadata Standard ISO 19115-3

    Citations

    Use constraints License
    License Creative Commons Attribution 4.0
    Persistent identifier https://pid.sarig.sa.gov.au/document/mesac28346
    Citation Kohn, B.;Belton, D.;Brown, R.;Gleadow, A.;Green, P.;Lovering, J. 1903. Experimental evidence for the pressure dependence of fission track annealing in apatite. Departmental Publication - Other
    https://pid.sarig.sa.gov.au/document/mesac28346

    Technical information

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    Maintenance and Update Frequency
    Geographic Reference GDA2020 (EPSG:7844)
    Geo bounding box {"type":"Polygon","coordinates":[[[129,-39],[141,-39],[141,-26],[129,-26],[129,-39]]]}
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