Fig. 8From: Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology a Tera-Wassenburg plot of allanite analyses (not corrected for common Pb) from sample #J504. Note that the common 207Pb/206Pb intercept is unusually high, see text for discussion; b Average Th–Pb age for the same analyses from sample #J504. The average Th age is preferred, see text for discussionBack to article page