|Author||Fleischer, R. L. ♦ Price, P. B.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||GEOLOGY AND MINERALOGY ♦ AGE ESTIMATION ♦ ARGON ISOTOPES ♦ DECAY ♦ EARTH ♦ FISSION PRODUCTS ♦ GEOLOGY ♦ GLASS ♦ METEORITES ♦ POTASSIUM ISOTOPES ♦ RUBIDIUM ISOTOPES ♦ STRONTIUM ISOTOPES ♦ TEKTITES ♦ TEMPERATURE ♦ URANIUM 238|
|Abstract||The use of fission fragment damage tracks for dating of geological and other glasses is described and applied to a number of tektites and a Libyan glass. By comparison with K-- Ar and Rb-- Sr dates the decay constant for spontaneous fission of U/sup 238/ is derived geologically to be 6.9 x 10/sup -17/ yr/sup Most of the tektite dates are in good agreement with those established by K-- Ar measurements. For Libyan glass the fission track age is 34 plus or minus 6 m.y. Elevated temperature experiments indicate that tracks in tektites would be stable at 22 deg C for much longer thaa the age of the earth and could disappear within 100 million years only if the temperature of the glass had exceeded 170 deg C. A suggestion for a method of dating thermal histories is presented. (auth)|
|Learning Resource Type||Article|
|Publisher Department||General Electric Research Lab., Schenectady, N.Y.|
|Journal||Journal of Geophysical Research|
|Organization||General Electric Research Lab., Schenectady, N.Y.|
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