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Swiss Journal of Geosciences
Fig. 5 | Swiss Journal of Geosciences

Fig. 5

From: Electron microprobe petrochronology of monazite-bearing garnet micaschists in the Oetztal-Stubai Complex (Alpeiner Valley, Stubai)

Fig. 5

Th–U–Pb chemical model ages of monazite (Mnz). Total ThO2* vs PbO (wt%) isochrons diagrams. ThO2* is ThO2 + UO2 equivalents expressed as ThO2. General minimal 2σ error on monazite PbO analysis is shown by a bar. Regression lines with the coefficient of determination R2 are forced through zero (Suzuki et al. 1994; Montel et al. 1996). Weighted average ages in Ma with MSWD and minimal error of 2σ are calculated from the single analyses belonging to an isochrone according to Ludwig (2001). The symbols mark analyses belonging to monazite age populations and defining isochrones, falling into Carboniferous, and Permian ranges of ages. Al and Ca are bulk rock compositions in wt% from Table 1

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