Uranium-series dating of corals from the southwest Pacific
The uranium-series technique is based on the observation that carbonates precipitating in nature, in particular corals and oolites, show an initial disequilibrium between Th²³⁰ and its parent U²³⁸. The amount of Th²³⁰ initially present in a coral is negligible in comparison to that subsequently generated by the radioactive decay of uranium. If the system remains closed then the ratio of Th²³⁰ to U²³⁸ is a simple function of time. Because there is a 15 percent excess of U²³⁴ to U²³⁸ in...[Show more]
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