Interpretation of charging on fracture or frictional slip surface of rocks

Akihiro Takeuchi, Hiroyuki Nagahama

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Fracturing and frictional sliding of quartz and granite under dry condition generates fractoluminescence, charged particle emission and electromagnetic radiation. Various kinds of experiments indicate that surface charge density on fracture or frictional slip surface of quartz and granite is ∼10-4 to 10-2 C/m2 which is larger than bound charges induced by the disappearance of piezoelectricity due to the release of stress. Hole and electron trapping centers, which is found in semiconductor devices with the Si-SiO2 system, are causes of surface charging on fracture or frictional slip surface of quartz crystal. The quantity of the surface charge is enough to cause corona discharge that can generate earthquake lights. The mechanism considering the hole and electron trapping centers has a probability to explain why non-piezoelectric minerals or rocks generate electromagnetic phenomena. It can be one of origins of seismo-electromagnetic phenomena (SEP).

Original languageEnglish
Pages (from-to)285-291
Number of pages7
JournalPhysics of the Earth and Planetary Interiors
Volume130
Issue number3-4
DOIs
Publication statusPublished - 2002 Jan 1

Keywords

  • Hole and electron trapping centers
  • Quartz
  • Seismo-electromagnetic phenomena
  • Semiconductor device
  • Surface charge

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Geophysics
  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science

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