Fig. 2From: Improvement of 40Ar/39Ar age determinations for Quaternary basaltic rocks by eliminating the peak suppression effectExamples of the peak suppression effect in 40Ar and 36Ar signals for volatile-rich samples: (left) basaltic rock, (right) alunite. Note that the 40Ar and 36Ar signals gradually increased during the measurement, so that it is not possible to deduce meaningful zero-time signalsBack to article page