Argon-argon dating determines the age of rocks based on the radioactive decay of potassium-40.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

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Is it true that Argon-argon dating determines the age of rocks based on the radioactive decay of potassium-40?

Yes. Argon-argon and potassium-argon dating are established radiometric techniques used to determine the age of rocks by measuring the radioactive decay products of potassium-40.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked 5 Aug 2026

The analysis

The retrieved literature (such as papers [1], [3], and [8]) consistently describes and utilizes potassium-argon and 40Ar/39Ar geochronology to date rocks based on the radioactive decay of potassium, supporting the claim without any contradictory evidence.

Evidence for · 3

Dating igneous rocks using the Potassium-Argon Laser Experiment (KArLE) instrument: A case study for ~380 Ma basaltic rocks.

2018

The study utilizes potassium-argon dating methods to determine the ages of basaltic rocks based on potassium and argon abundances.

Get citation

Cho, Y. & Cohen, B. (2018). Dating igneous rocks using the Potassium-Argon Laser Experiment (KArLE) instrument: A case study for ~380 Ma basaltic rocks.. doi.org. https://doi.org/10.1002/rcm.8214

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More for · 2

40Ar/39Ar dating of a hydrothermal pegmatitic buddingtonite–muscovite assemblage from Volyn, Ukraine

2022

The research applies 40Ar/39Ar geochronology to potassium-bearing minerals like buddingtonite and muscovite to date geological events.

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Franz, G., Sudo, M., & Khomenko, V. (2022). 40Ar/39Ar dating of a hydrothermal pegmatitic buddingtonite–muscovite assemblage from Volyn, Ukraine. doi.org. https://doi.org/10.5194/ejm-34-7-2022

Argon-based geochronology: advances, limitations and perspectives

2025

The review outlines how argon-based geochronology, including K-Ar and 40Ar/39Ar dating, leverages the presence of potassium in rocks to determine their age and thermal history.

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Chang, S., Shi, W., Wang, Y., & Wang, F. (2025). Argon-based geochronology: advances, limitations and perspectives. doi.org. https://doi.org/10.1093/nsr/nwaf277

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first checked05 Aug 2026

judged → SUPPORTED · 8205 Aug 2026

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