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Jpn. J. Appl. Phys. 21 (1982) pp. L28-L30  |Next Article|  |Table of Contents|
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Letter

Electron Spin Resonance of Petrified Woods for Geological Age Assessment

Motoji Ikeya

Technical College, Yamaguchi University

(Received October 23, 1981; accepted for publication December 19, 1981)

Electron spin resonance (ESR) spectra of both organic and inorganic radicals in petrified woods have been studied for the assessment of age and burial condition. Young woods contain lignin radicals that produce a signal with a width of about 7 G at g=2.0036. Radical spectra of acetic acid (CH₂COOH·) and of methyl (CH₃·) with hyperfine structures were observed for petrified woods of the Miocene epoch. ESR signal at g=2.0025 similar to coal was observed for the black carbonated portion. The spectrum, similar to that of natural quartz, was observed for silicated petrified woods older than Miocene. It is concluded that a rough age estimation of petrified wood can be made with ESR.

URL: http://jjap.jsap.jp/link?JJAP/21/L28/
DOI: 10.1143/JJAP.21.L28

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References | Citing Articles (3)

1. E. J. Zeller, P. W. Levy and P. L. Mattern: Proc. Symp. Radioactive Dating and Method of Low Level Counting (IAEA, Vienna, 1967) p. 531.
2. D. W. McMorris: Nature 222 (1968) 870.
3. M. Ikeya: Nature 255 (1975) 46.
4. M. Ikeya and T. Miki: Science 207 (1980) 977
5. M. Ikeya and K. Ohmura: J. Geology 20 (1981) 247.
6. J. L. Bada: Earth & Planet. Sci. Lett. 15 (1972) 223.
7. S. Matsu'ura and N. Ueta: Nature 286 (1980) 883.
8. M. Ikeya: Naturwissenschaften 67 (1981) S474.
9. A. Carrington and A. D. MacLachlan: Intoduction to Magnetic Resonance (Harper Low, New York, 1967) p. 99.
10. H. L. Recofsky: Anal. Chem. 40 (1968) 1699.

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