Uranium content and radiogenic ages of hypersthene,bronzite, amphoterite and carbonaceous chondrites |
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Authors: | David E. Fisher |
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Affiliation: | Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149 USA |
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Abstract: | U was measured by fission track analysis in 115 samples of hypersthene, bronzite, amphoterite and carbonaceous chondrites. On a weight basis the average values for the Cl carbonaceous and bronzite chondrites are similar to the “classic” value of 11 ppb, but the hypersthenes and amphoterites are ~50 per cent higher. Each class shows a well-determined peak in the U abundance distribution, allowing the calculation of radiogenic ages and comparison with other elements of interest. |
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