Cosmogenic dating techniques

25-Aug-2017 11:33

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The most commonly used "cosmogenic isotopes" are radionuclides (He, require far less labor intensive purification and a simple sector-field mass spectrometer.

Ar/Ar dating is limited to K-rich minerals, such as sanidine, from volcanic ashes and is primarily used to bracket the timing of site occupation.

If we are particularly interested in the timing of the uncovering of a surface—say, bedrock that had been covered by ice, or sediments that had been revealed by the incision of a stream—we can employ cosmogenic nuclide surface exposure dating to study that uncovering process.

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