Dating using the potassium-argon (K-Ar) clock employs three different methods.
As Paul has exhorted us to test all things (1 Thessalonians ), let’s carefully look at these three methods: we know that assumption 7 (Sidebar A) does not hold.
The family of potassium feldspars have a wide range of blocking temperatures (~900°C to 135°C), and therefore assumption 10 is not generally applicable—meaning one cannot definitively differentiate between a true isochron and a mixing line (an imperfect mixing of two or more rock types).
Methods of correcting for atmospheric absorption of argon are still quite hypothetical, making assumption 11 questionable.
Called “noble” because it rarely bonds with other elements, argon (Ar) is one of the six noble gases.The use of the ultraviolet laser for Ar/Ar dating was pioneered here, and we are dedicated to developing and modifying techniques for dating ultra-small samples to high precision, and ultra-high resolution noble gas diffusion experiments.The Ar/Ar dating method is a very versatile radiometric dating tool, generally applicable to finding the age of any potassium-bearing rock or mineral.Assumptions 2, 3, 4, and 5 are all closed-system assumptions that are not realistic, especially in secular deep-time frames.Assumption 8 is strongly dependent on the methodology used and the personnel making the measurements.