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Swiss Journal of Geosciences
Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: Triassic magmatism on the transition from Variscan to Alpine cycles: evidence from U–Pb, Hf, and geochemistry of detrital minerals

Fig. 6

Hf-isotope systematics of detrital zircons, showing εHf(t) versus time in Ga: a Eastern Alpine Fuorn and Saluver formations taken from Beltrán-Triviño et al. (2013); b Southern Alps units, eastern Lombardy section; and c Southern Alps units, western Lombardy section. a-c The time axis represents the values of 206Pb/238U crystallisation age of single zircons, and the second the two-stage Hf depleted mantle model ages (Hf-TDM2) estimated for single zircons. Coloured horizontal lines with symbols indicate the time range (Ga) of Hf-TDM2 of each sample. Leaned coloured dashed lines show the evolution of εHf for representative zircons from their crystallization age back to the depleted mantle growth curve. Vertical coloured lines indicate the value of the Hf-TDM2 in Ga for representative zircons. d Histogram and probability density distribution of the Hf-TDM2 of the analysed detrital zircons

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