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Science 12 March 1982:
Vol. 215. no. 4538, pp. 1392 - 1393
DOI: 10.1126/science.215.4538.1392
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Articles

Dating of a Fault by Electron Spin Resonance on Intrafault Materials

MOTOJI IKEYA 1, TOSHIKATSU MIKI 1, and KAZUHIRO TANAKA 2

1 Technical College, Yamaguchi University, Ube 755, Japan
2 Civil Engineering Laboratory, Central Research Institute of the Electric Power Industry, Abiko, Chiba 270-11, Japan

The total dose of natural radiation and the age were determined from paramagnetic defects in quartz grains at a fractured fault zone. Young age at the fault indicates that the accumulated defects in rocks were destroyed by high stress or high temperature at the time of the last fault movement, setting the clock time to zero. The technique was applied to quartz grains crushed by uniaxial compression in the laboratory to verify this interpretation.

Submitted on June 26, 1981
Revised on September 8, 1981


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
ESR isochron dating of the Nojima Fault gouge, southwest Japan, using ICP-MS: an approach to fluid flow events in the fault zone.
T. Fukuchi and N. Imai (1998)
Geological Society, London, Special Publications 144, 261-277
   Abstract »    PDF »
ESR studies for absolute dating of fault movements.
T. FUKUCHI (1992)
Journal of the Geological Society 149, 265-272
   Abstract »    PDF »


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