Fission-track retention age of the Bondoc mesosiderite

Details Fission-track retention age of the Bondoc mesosiderite Fission-track retention age of the Bondoc mesosiderite

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..49..181b&link_type=abstract

Earth and Planetary Science Letters, vol. 49, no. 2, Sept. 1980, p. 181-187. Science Research Council

Computer Science

1

Bondoc Meteorite, Nuclear Fission, Radioactive Age Determination, Space Exploration, Meteorites, Mesosiderites, Bondoc Meteorite, Ages, Fission Tracks, Whitlockites, Irradiation, Crystals, Nickel, Distribution, Data, Experiments, Procedure, Density, Uranium, Cooling Rate, Formation, Techniques, Comparisons

Scientific paper

Whitlockites have been extracted from the Bondoc mesosiderite and found to contain (0.7-2.7) x 10 to the 6th per sq cm of spontaneous-fission tracks. Thermal-neutron irradiation of these crystals along with terrestrial apatite age standards, and measurement of the track densities so induced, lead to the determination of a whitlockite track-retention age of 2.68 (plus or minus 0.30) Gyr for Bondoc, which is essentially independent of the initial (Pu/U) ratio. This young age is in qualitative, and, within the experimental uncertainties, in quantitative, agreement with the slow cooling rates determined for many mesosiderites and specifically for Bondoc from Ni distributions in the metal phase.

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