Positive Electrification on Rock Surface Detected in Field Observations and Laboratory Experiments

• Takeuchi Akihiro

  Tokai university

• Futada Yukako

  Akita Prefectural University

• Okubo Kan

  Tokyo Metropolitan University

• Nakamura Yukinobu

  Hosokura Metal Mining Co. Ltd.

• Abe Michiaki

  Tohoku University

• Takeuchi Nobunao

  Akita Prefectural University

Bibliographic Information

Other Title

• 野外観測と室内実験で検出される岩石表面の正帯電

Abstract

A large plate antenna, lying 1.2-m above the floor of an underground mine gallery in northeast Japan, detected electric signals when seismic waves arrived. One of the possible mechanisms is the positive electrification of the floor. Here, we inspected such electrification in a laboratory using an air-dried rock block quarried from the mine. The block under partial load showed the positive electrification on the surface of the unstressed volume. The assumption of positive holes is reasonable to explain the electrification. They are activated from the deformation of peroxy bonds, a populous lattice defect in rock-forming minerals. In case of the underground-detection, the seismic waves would activate p-holes near the floor.

Journal

• IEEJ Transactions on Fundamentals and Materials

  IEEJ Transactions on Fundamentals and Materials 129 (3), 153-154, 2009

  The Institute of Electrical Engineers of Japan

Keywords

• positive electrification
• peroxy bond
• positive hole
• seismo-electromagnetic phenomena
• electric fieldmill

Details

• CRID: 1390001204593070336
• NII Article ID: 10024772865
• NII Book ID: AN10136312
• DOI: 10.1541/ieejfms.129.153
• ISSN: 13475533
• ISSN: 03854205
• Web Site: http://www.jstage.jst.go.jp/article/ieejfms/129/3/129_3_153/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed