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Annealing of ion tracks in apatite under pressure characterized in situ by small angle x-ray scattering

Schauries, Daniel ; Afra, Boshra ; Mota-Santiago, Pablo ; Trautmann, Christina ; Lang, Maik ; Ewing, Rodney C. ; Kirby, Nigel ; Kluth, Patrick (2020)
Annealing of ion tracks in apatite under pressure characterized in situ by small angle x-ray scattering.
In: Scientific Reports, 10 (1)
doi: 10.1038/s41598-020-57600-y
Article, Bibliographie

Abstract

Fission track thermochronology is routinely used to investigate the thermal history of sedimentary basins, as well as tectonic uplift and denudation rates. While the effect of temperature on fission track annealing has been studied extensively to calibrate the application of the technique, the effect of pressure during annealing is generally considered to be negligible. However, a previous study suggested elevated pressure results in a significantly different annealing behaviour that was previously unknown. Here, we present a method to study track annealing in situ under high pressure by using synchrotron-based small angle x-ray scattering (SAXS). To simulate fission tracks in a controlled environment, ion tracks were created in apatite from Durango, Mexico using 2 GeV Au or Bi ions provided by an ion accelerator facility. Samples were annealed at 250 degrees C at approximately 1 GPa pressure using diamond anvil cells (DACs) with heating capabilities. Additional in situ annealing experiments at ambient pressure and temperatures between 320 and 390 degrees C were performed for comparison. At elevated pressure a significantly accelerated annealing rate of the tracks was observed compared with annealing at ambient pressure. However, when extrapolated to geologically relevant temperatures and pressures, the effects become very small. The measurement methodology presented provides a new avenue to study materials behaviour in extreme environments.

Item Type: Article
Erschienen: 2020
Creators: Schauries, Daniel ; Afra, Boshra ; Mota-Santiago, Pablo ; Trautmann, Christina ; Lang, Maik ; Ewing, Rodney C. ; Kirby, Nigel ; Kluth, Patrick
Type of entry: Bibliographie
Title: Annealing of ion tracks in apatite under pressure characterized in situ by small angle x-ray scattering
Language: English
Date: 28 January 2020
Publisher: Springer Nature
Journal or Publication Title: Scientific Reports
Volume of the journal: 10
Issue Number: 1
DOI: 10.1038/s41598-020-57600-y
Abstract:

Fission track thermochronology is routinely used to investigate the thermal history of sedimentary basins, as well as tectonic uplift and denudation rates. While the effect of temperature on fission track annealing has been studied extensively to calibrate the application of the technique, the effect of pressure during annealing is generally considered to be negligible. However, a previous study suggested elevated pressure results in a significantly different annealing behaviour that was previously unknown. Here, we present a method to study track annealing in situ under high pressure by using synchrotron-based small angle x-ray scattering (SAXS). To simulate fission tracks in a controlled environment, ion tracks were created in apatite from Durango, Mexico using 2 GeV Au or Bi ions provided by an ion accelerator facility. Samples were annealed at 250 degrees C at approximately 1 GPa pressure using diamond anvil cells (DACs) with heating capabilities. Additional in situ annealing experiments at ambient pressure and temperatures between 320 and 390 degrees C were performed for comparison. At elevated pressure a significantly accelerated annealing rate of the tracks was observed compared with annealing at ambient pressure. However, when extrapolated to geologically relevant temperatures and pressures, the effects become very small. The measurement methodology presented provides a new avenue to study materials behaviour in extreme environments.

Additional Information:

Artikel-ID: 1367

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
Date Deposited: 29 Feb 2024 08:19
Last Modified: 29 Feb 2024 08:19
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