Chaîne varisque
Open Access

Table 1

Definition of the QC quality index for the LA-ICP-MS data.

if |a-b|/(Δa + Δb) > 2 1.4 1 0.7 0.2 0.1 else
then QC = 0.01 0.10 0.25 0.50 0.75 0.90 1.00

a ± Δa, b ± Δb (2σ) are the apparent 206Pb/238U and 207Pb/235U ages ± errors of a laser spot.

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