Thermal stability of ESR signals in hydrothermal barites

Fumihiro Sato, Shin Toyoda, Debabrata Banerjee, Junichiro Ishibashi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Thermal stability of the ESR signals from barites in chimneys deposited from hydrothermal vents is investigated using isothermal and isochronal annealing experiments. A combination of first and second order kinetics is required to explain the results. The Arrhenius plots of the decay rate constants give the activation energies of 1.0-1.3 eV. From the estimated decay rate constants at the sea bottom (3 °C), the decay rate of the signal was calculated to be less than 2% for the period of 20 ka, suggesting the applicability of the ESR method for dating barites up to about twenty thousand years.

Original languageEnglish
Pages (from-to)866-870
Number of pages5
JournalRadiation Measurements
Volume46
Issue number9
DOIs
Publication statusPublished - Sep 1 2011

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation

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