10.6084/m9.figshare.7591346.v1 Joana Reis Magalhães Joana Reis Magalhães Antonio Pedrosa-Soares Antonio Pedrosa-Soares Ivo Dussin Ivo Dussin Othmar Müntener Othmar Müntener Marco Aurélio P. Pinheiro Marco Aurélio P. Pinheiro Luiz Carlos da Silva Luiz Carlos da Silva Luiz Guilherme Knauer Luiz Guilherme Knauer Anne-Sophie Bouvier Anne-Sophie Bouvier Lukas Baumgartner Lukas Baumgartner First Lu-Hf, δ18O and trace elements in zircon signatures from the Statherian Espinhaço anorogenic province (Eastern Brazil): geotectonic implications of a silicic large igneous province SciELO journals 2019 Statherian magmatism taphrogenic event Espinhaço rift São Francisco paleocontinent 2019-01-16 02:40:39 Dataset https://scielo.figshare.com/articles/dataset/First_Lu-Hf_18O_and_trace_elements_in_zircon_signatures_from_the_Statherian_Espinha_o_anorogenic_province_Eastern_Brazil_geotectonic_implications_of_a_silicic_large_igneous_province/7591346 <div><p>ABSTRACT: The Espinhaço rift system encompasses taphrogenetic events from the Statherian to Tonian in the São Francisco-Congo (SFC) paleocontinent. The magmatism is represented mainly by metamorphosed anorogenic granites and rhyolites with subordinate amphibolites. Zircon U-Pb (LA-ICPMS and SHRIMP) ages from felsic (1748 ± 3 Ma and 1740 ± 8 Ma) and mafic (1725 ± 4 Ma) rock samples, coupled with previous studies suggest that the Espinhaço igneous province erupted from ca. 1.79 Ga to ca. 1.70 Ga. The felsic rocks show characteristics of A-type magmas. The negative εHf(t) data for meta-rhyolite zircons (-12.32 to -17.58), the moderate δ 18 O values (7.02 to 7.98) and the REE patterns suggest crustal melting related to an extensional environment. The mafic rock shows negative values of εHf(t) in zircons (-4.05 to -8.25) and moderate δ 18 O values (5.56 to 7.87). The results disclose a basaltic magmatism in continental intraplate setting whose parental magma could have been derived from the subcontinental lithospheric mantle with contamination of crustal material. These data coupled with coeval Espinhaço magmatism and mafic dyke swarms found to the south of the Espinhaço rift system reinforce the evidence of a long-lived Statherian silicic large igneous province (SLIP) on the SFC paleocontinental block.</p></div>