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- W4254247908 abstract "The Serra do Catu Batolith is located in the interface between the Pernambuco-Alagoas Domain and the Sergipano Belt/Domain. The Pernambuco-Alagoas Domain show rocks with T DM model ages ranging from 2.4Ga to 0.90Ga, while the Sergipano Belt/Domain show record of a ~1.0 Ga orogeny (Marancó-Poço Redondo Domain), and record of Brasiliano Orogeny (Canindé Domain). The Neoproterozoic Serra do Catu Batolith is tardi- to post-tectonic and it was emplaced into a sinistral transpressive shear zone in pull-apart structure. It comprises three coeval felsic facies: quartz monzonite to monzogranite, discontinuously distributed in the periphery of the intrusion (the oldest); (quartz) alkalifeldspar gray syenite, occupying the central portion of the batolith, and the quartz syenite to quartz alkalifeldspar pink syenite (the younger), disposed among the two previous units. The lithotypes belong to the shoshonitic-ultrapotassic series, they present high LILE (Rb, Ba and Sr) and low HFSE (Nb, Zr, Y) content, and exhibit outstanding negative anomalies of Nb, Ta, P and Ti and geochemical signature related to subducction in continental arc setting. The isotopic results of this Batolith indicate εNd (0,6Ma.) of -3.8 to -5.45 and model ages T DM ranging from 1.4 to 1.6 Ga. Considering the geologic and isotopic data, it is proposed that the protholith of the studied sienitoids involved an enriched lithospheric mantle and orthorocks from the Sergipano Domain . The available data suggest that the activity of the shear zone was possibly related for enriched lithosferic mantle partial melt, by decompression melting, generating the magmas with the observed isotopic signatures" @default.
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- W4254247908 date "2009-06-01" @default.
- W4254247908 modified "2023-09-28" @default.
- W4254247908 title "Caracterização geoquímica e isotópica do batólito Serra do Catu e sua evolução da interface dos domínios Sergipano e Pernambuco-Alagoas, Província Borborema" @default.
- W4254247908 doi "https://doi.org/10.25249/0375-7536.2009392324337" @default.
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