What is uranium series dating


28-Oct-2015 16:17

At secular equilibrium, the number of thorium-230 decays per year within a sample is equal to the number of thorium-230 produced, which also equals the number of uranium-234 decays per year in the same sample.

Uranium-thorium dating has an upper age limit of somewhat over 500,000 years, defined by the half-life of thorium-230, the precision with which we can measure the thorium-230/uranium-234 ratio in a sample, and the accuracy to which we know the half-lives of thorium-230 and uranium-234.

Uranium-series (U-series) analyses are an essential component of many research projects in Earth and environmental science, oceanography, hydrology and science-based archaeology.

Topics range from magma chamber evolution and volcanic hazard prediction, global climatic change through dating of authigenic carbonate deposits, human evolution through dating of bone, to the study of groundwater evolution.

The contributions of uranium/thorium and marine palynology to the dating of the Lake Wangoom pollen record, western plains of Victoria, Australia.

Uranium series disequilibrium: Unequal radioactivity of the intermediate radioisotopes (e.g., Ra) in the U-series decay chains resulting from changes in the respective elemental ratios (or called elemental fractionation) during a geological or environmental event or process.

Once disequilibrium occurs, secular equilibrium status will be rest ...

Mass-spectrometric 230Th-234U-238U dating of the Devils Hole calcite vein.

Pleistocene extinction of Genyornis newtoni: human impact on Australian megafauna. Uranium decays through a number of radioactive daughter isotopes, some of which have half-lives comparable to the time scale of prehistoric archaeology.



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