Neoarchean and Rhyacian TTG-Sanukitoid suites in the southern São Francisco Paleocontinent, Brazil: Evidence for diachronous change towards modern tectonics

Supplemental Material: Earth’s new tectonic regime at the dawn of the Paleoproterozoic: Hf isotope evidence for efficient crustal growth and reworking in the São Francisco craton, Brazil

“…Sample 66B is a tholeiitic metabasic rock crystallized at 2710 ± 32 Ma and metamorphosed under granulite facies metamorphism at 2067 ± 82 Ma (Bruno et. al., 2020).…”

“…Sample 08, a hornblende biotite gneiss of the sanukitoid compositional group displays prismatic, euhedral to subhedral zircon grains with fine igneous oscillatory zoning in the cores surrounded by homogeneous bright rims with crystallization age defined by an upper intercept of 2168 ± 21 Ma and metamorphic overprint defined by a lower intercept of 584 ± 14 Ma (Bruno et. al., 2020).…”

“…The location of the samples is shown on Figure 1 of the manuscript and all the data is presented in Supplementary Material B, with a summary of the results shown in Table 1 of Supplementary Material A. All these samples were previously dated via (LA-ICP-MS) U-Pb in zircon by Bruno et al (2020) and Bruno et al (2021).The Lu-Hf analyses were performed on concordant to sub-concordant zircon grains directly on U-Pb spots (when possible), using 40 µm spots. Analyses were performed at the University of Portsmouth (UK) using an ASI Resolution SE 193 excimer laser connected to a Nu Plasma I MC-ICP-MS. Laser conditions for tuning were 40 µm, 4.5 J/cm 2 and 10 Hz.…”

“…The location of the samples is shown on Figure 1 of the manuscript and all the data is presented in Supplementary Material B, with a summary of the results shown in Table 1 of Supplementary Material A. All these samples were previously dated via (LA-ICP-MS) U-Pb in zircon by Bruno et al (2020) and Bruno et al (2021).…”

“…1.5116 0.0337 (Spencer et al 2020). (Bruno et. al., 2020) and corresponds to εHf ( 2693Ma) values between -0.65 and -8.70, whereas the Lu-Hf analysis performed on the metamorphic bright rims range in εHf (2043 Ma) values between -13.15 and -22.01.…”