Fig. 4: Plot of initial epsilon hafnium (εHf(t)) versus zircon age for the three silicic LIPs studied here and Archean to Tonian detrital and igneous zircons from the Amazon Craton. Error bars are at 2σ level.
From: Large-scale crustal growth driven by LIP magmatism during the Paleoproterozoic
KREEP is the Hadean incompatible element enriched lunar basalt (176Lu/177Hf = 0.02050), CF-2 is an Archean mafic source (176Lu/177Hf = 0.01749), and TTG is a tonalite-trondhjemite-granodiorite source (176Lu/177Hf = 0.00550). The depleted mantle (DM) curve is plotted using the values of ref. 46. The kernel density estimate (KDE) curve in the horizontal axis was built with new and previously published zircon ages. The KDE in the vertical axis comprises new Lu-Hf data from the silicic LIPs, displaying the most frequent εHf values. The inset depicts literature Nd isotope data for the Amazon Craton in the ɛNd against U-Pb age space, compiled from the same sources of Fig. 2. Circles are data from igneous rocks from the three igneous cycles and are color-coded according to their second-stage TDM ages. Unfilled squares are data from rocks that do not belong to the igneous cycles. DM curve according to [57]. Data for the reproduction of this figure are in Supplementary Data 1 and 9.
