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

Fig. 5

From: Post-Variscan metamorphism in the Apuseni and Rodna Mountains (Romania): evidence from Sm–Nd garnet and U–Th–Pb monazite dating

Fig. 5

Back-scattered electron (BSE) images. Ages and location of U-Th–Pb analyses are indicated. a Pre-Alpine monazite in sample 16Md1 exhibits an allanite corona and euhedral zircon growth, b compositional zoning in a pre-Alpine monazite from sample 12BrBA; c distinctly zoned composite monazite overgrowing a staurolite grain. The grain boundary of the staurolite was graphically enhanced to illustrate the correlation between the internal zoning in the monazite and the overgrown area; d a subhedral to rounded grain forming an inclusion in staurolite from the Bihor Unit; e BSE image and compositional map (Y, Th, U) from a monazite inclusion in a garnet porphyroblast from the Baia de Arieş Nappe); f BSE image and compositional map of a composite monazite from the Bihor Unit showing strong zonation of Th, Y and U correlating with different age clusters; g BSE image and element distribution maps of dated monazite from sample 14Ch2 (Ţicău Inselberg). Element distribution maps were produced using XMap from Bernhardt et al. (1995)

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