How do you determine the age of a feldspar sample?

1 answer

1263512

2026-05-04 12:25

Feldspar has 98 atoms of 40Ar every 97 atoms of 40K. 10.9% of 40K decays to 40Ar. t(1/2)=1.25E9

0.693/1.25E9= 567E-10 = K

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