Argon dating

by  |  20-Sep-2019 10:55

However, the Argon, a noble gas, constitutes approximately 0.1-5% of the Earth's present day atmosphere.Because it is present within the atmosphere, every rock and mineral will have some quantity of Argon.One out of every 10,000 Potassium atoms is radioactive Potassium-40 (K-40).

The quantity of potassium in a rock or mineral is variable proportional to the amount of silica present.

Therefore, mafic rocks and minerals often contain less potassium than an equal amount of silicic rock or mineral.

There's a more basic explanation here: books.google.com/…

Argon-Argon dating is similar to Potassium-Argon dating, but it requires less material.

Potassium can be mobilized into or out of a rock or mineral through alteration processes.

Community Discussion