Potassium argon dating mt st helens
We conclude this paper with some suggestions for further investigations to check the validity of K/Ar chronometers.These investigations suppose complete coordination between different disciplines and laboratories.But ignorance of exact radioactive series, ignorance of the existence of isotopes and the use of oversimplified atomic models gave very questionable results.All radiochronometers are based on the radioactive decay of unstable atoms (“parent” atoms, P).
The most important point of the procedure consists in the discussion and confrontation with other possible explanations.
The choice of these initial conditions affects the results.
These assumptions are not demonstrated, only supposed to be true.
To be able to give a known relation between the quantities P and D measured presently in a rock and the time elapsed since the formation of the rock, we need to make the following basic assumptions: If we compare the radioactive rock with an hourglass, the conditions are summarized in Figure 3a and 3b, to illustrate the initial conditions chosen and the “closed system” concept.
As an illustration, the next paragraph will focus on the very popular potassium/argon method (K40/Ar40).