radiogenic argon

radiogenic argon

[¦rād·ē·ō¦jen·ik ′är‚gän]
(nuclear physics)
Argon occurring in rocks and minerals that is the result of in-place decay of potassium-40 since the formation of the earth.
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References in periodicals archive ?
The main difference is that with the whole rock method, the entire sample is analyzed and may include radiogenic argon from weathered phases, pre eruption phenocrysts, or xenolithic contamination.
Total fusion analysis includes the radiogenic argon component of the entire sample in a single measurement and can mask internal variability and evidence of weathering and xenolithic contamination.
36]Ar, so we can conclude that there is simply too little radiogenic argon to obtain a reliable age.
In trying to date the impact from radiogenic argon in a pocket of melted glass, Bogard measured far too high an abundance to give a meaningful age.
The team identified a number of compounds such as radiogenic argon, a product of decaying potassium, which indicates interactions between water and rock underneath the moon's icy shell.