In situ Raman spectroscopy on kerogen at high temperatures and high pressures

En Ping Huang, Eugene Huang, Shu Cheng Yu, Yen Hua Chen, Jiann Shing Lee, Jiann Neng Fang

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15 Citations (Scopus)

Abstract

Kerogen samples were treated at temperatures and pressures up to 25-600°C and ~9 GPa, respectively. In situ micro-Raman spectroscopy was used to measure the systematic changes in the first-order Raman spectral features during the process of temperature or pressure increment. Three Raman bands, D1, D2, and G bands, were examined to characterize the structural and chemical changes of kerogen at high temperatures and pressures. We found that the wavenumbers of D1, D2 and G bands showed a linear variation with both temperature and pressure. Therefore, a correlation between R1 and R2 and the peak temperature in regionally metamorphosed rocks cannot be applied to this work. This result implies that the G band may serve as a temperature or pressure indicator during the promotion of maturation of kerogen. Kerogen possesses reversible properties in contrast with the natural samples recovered from the field suffered from prolonged thermal history during regional metamorphism.

Original languageEnglish
Pages (from-to)593-600
Number of pages8
JournalPhysics and Chemistry of Minerals
Volume37
Issue number9
DOIs
Publication statusPublished - 2010 Feb 11

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Geochemistry and Petrology

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