K dating

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Step-heating is the most common way and involves either a furnace or a laser to uniformily heat the sample to evolve argon.

Therefore, mafic rocks and minerals often contain less potassium than an equal amount of silicic rock or mineral.Argon can mobilized into or out of a rock or mineral through alteration Ar and potassium, there is not a reliable way to determine if the assumptions are valid.Argon loss and excess argon are two common problems that may cause erroneous ages to be determined.Instead, the ratios of the different argon isotopes are measured, yielding more precise and accurate results.Additional advantages of the single isotopic measurements of the K.

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