Fission tracks and cooling rates of meteorites |
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| Authors: | Ghislaine Crozaz |
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| Institution: | 1. Department of Earth and Planetary Sciences and The McDonnel Center for Space Sciences, Washington University, 63130, St. Louis, Missouri, USA
2. Physical Research Laboratory, 380 009, Ahmedabad, India
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| Abstract: | Recent work on fission track studies of meteorite samples to obtain cooling rates of metetorite parent bodies is reviewed. The cooling rates of chondrites are in excess of 1oK/106 yr. Fission track studies of phosphate grains in mesosiderites do not support the extremely slow cooling rates of 0°1oK/108 yr for these meteorites, inferred from metallographic studies. The accumulating evidence from fission track studies indicates a gross underestimation of the cooling rates of meteorites as determined by the metallographic techniques. |
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