KAr isochron method and initial argon ratios

Details KAr isochron method and initial argon ratios KAr isochron method and initial argon ratios

Mar 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970e%26psl...8...71h&link_type=abstract

Earth and Planetary Science Letters, Volume 8, Issue 1, p. 71-76.

Physics

7

Scientific paper

40Ar36Ar versus40K36Ar isochron plots of 3 sets of discordant KAr age data yielded concordant isochrons with different initial40Ar36Ar ratios. These results indicate that (1) the initial40Ar36Ar ratio was homogeneous within each set of samples but not always equal to the present atmospheric argon ratio, (2) the standard method of non-radiogenic argon correction is, therefore, not always adequate (3) this isochron method can yield more meaningful ages and (4) excess argon can be due to high initial40Ar36Ar ratio.

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