Geochemical and detrital zircon geochronological investigation of the metavolcanosedimentary Araticum complex, sergipano fold belt: Implications for the evolution of the Borborema Province, NE Brazil

Accretion Tectonics in Western Gondwana Deduced From Sm‐Nd Isotope Mapping of Terranes in the Borborema Province, NE Brazil

“…In addition, correlation between Cariris Velhos rocks in a regional context is still an open question. In the Sergipano Belt (Southern Sub‐province of the Borborema Province), synorogenic Tonian granites are associated with the development of a major continental arc in response to the convergence between the São Francisco Craton and the Pernambuco‐Alagoas (Lima et al, ; Oliveira et al, ). So far, there is no evidence of this event in the adjoining West Africa counterpart; however, similar Tonian rocks are described in some areas, such as eastern Chad (de Wit et al, ).…”

Early to late Neoproterozoic subduction-accretion episodes in the Cariris Velhos Belt of the Borborema Province, Brazil: Insights from isotope and whole-rock geochemical data of supracrustal and granitic rocks

“…In effect, Post-Cariris late Tonian and Cryogenian A-type granites, rift sequences and mafic-ultramafic intrusions of similar age are also found in the belts surrounding the northern São Francisco Craton margin, in the Rio Preto (Caxito et al, 2014c;Alcântara et al, 2017), Riacho do Pontal (Caxito et al, 2016;Salgado et al, 2016) and Sergipano (Oliveira et al, 2010) belts. In addition, zircon populations that range from 850 to 1000 Ma are present in several widespread Ediacaran metasedimentary and metavolcanosedimentary sequences throughout the province, such as the Araticum Complex of the Sergipano Fold Belt (Lima et al, 2019) and Cabrobró Complex of the Pernambuco-Alagoas Terrane (Cruz et al, 2014), also indicating inheritance of exhumed Stenian-Tonian crust.…”

“…However, the role of metasedimentary sequences in the evolution of the province has only recently been emphasized, including the investigation of probable sources, depositional settings and tectonic significance of paleobasins (e.g. Oliveira et al, 2015;Arthaud et al, 2015;Caxito et al, 2014cCaxito et al, , 2016Lima et al, 2019;Basto et al, 2019). In spite of paleoproterozoic source contributions, provenance studies in other portions of Gondwana have shown that major supracrustal sequences provide a wide range of Neoproterozoic deposition ages (i.e.…”

Isotopic and geochemical characterization of the metavolcano-sedimentary rocks of the Jirau do Ponciano Dome: A structural window to a Paleoproterozoic continental arc root within the Southern Borborema Province, Northeast Brazil

“…The Simão Dias and Itabaiana domes are interpreted as uplifts of the São Francisco Craton basement to the north (D'el-Rey Silva and McClay, 1995;Oliveira et al, 2015;Lima et al, 2018). However, the tectonic link between the craton and the Jirau do Ponciano Dome (JPD) has not yet been proven and its significance for the Southern BP evolution remains unknown.…”

“…Collisional tectonics are characterized by intense crustal growth and reworking in response to deformation, metamorphism, and magmatism (Whitney et al, 2004) followed by crustal exhumation that might expose ancient high-grade rocks from the middle-lower crust through structural windows, such as dome structures (Yin, 2004). In the southern Borborema Province (BP), Northeast Brazil, metavolcanic-sedimentary sequences are grouped in the Sergipano Fold Belt, which consists of a Brasiliano/Pan-African collisional orogen that resulted from the oblique convergence between the São Francisco Craton and smaller crustal fragments (Oliveira et al, 2010;Lima et al, 2018).…”