Hydrothermally derived fracturing of quartz in granitic rock occurring in low pressure and high temperature regime of geothermal fluid

N. Hirano, J. Abe, G. Bignall, N. Tsuchiya

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

In our past fracturing experiments using the granite and artificial quartz, fracturing was accelerated under the specific hydrothermal conditions. We have already reported fracturing phenomena accelerated by hydrothermal solution as hydrothermally derived fracturing (HDF). These phenomena occurred under the hydrothermal conditions subcritical and including supercritical condition such as 600°C, 60MPa. And, the result of artificial quartz fracturing experiment suggested that fracturing of granite was initiated by quartz fracturing. Therefore, We investigated the fracturing of quartz grain in natural granite rock samples under same conditions as past experiments. As a result, it is confirmed that the natural quartz fracturing in natural granite was accelerated at 400°C, 0.1 MPa - 1 MPa drastically. This microfracture making was may be useful for the application of shallow geothermal development near the volcano.

Original languageEnglish
Pages (from-to)303-306
Number of pages4
JournalTransactions - Geothermal Resources Council
Volume27
Publication statusPublished - 2003
EventInternational Collaboration for Geothermal Energy in the Americas - Geothermal Resources Counsil: 2003 Annual Meeting - Morelia, Michoacan, Mexico
Duration: 2003 Oct 122003 Oct 15

Keywords

  • Geothermal fluid supercritical water
  • Granite
  • HDF
  • Hydrothermally derived fracture

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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