SHRIMP U-Pb and Sm-Nd ages of the Niquelândia layered complex: Meso- (1.25 Ga) and Neoproterozoic (0.79 Ga) extensional events in central Brazil

Pimentel, MarcioFerreira, Cesar Fonseca FilhoArmstrong, Richard2015-12-130301-9268http://hdl.handle.net/1885/86777The Niquelândia mafic-ultramafic layered complex, in the central part of the Brasília Belt, is one of three large complexes forming an approximately 350 km long linear NNE belt. The complexes are metamorphosed under granulite to amphibolite facies and hKeywords: lead; neodymium; samarium; uranium; extensional tectonics; geochronology; layered intrusion; Proterozoic; ultramafic rock; article; Brazil; complex formation; metamorphosis; molecular model; proterozoic; rock; volcano; Brazil; South America Mafic-ultramafic; Mesoproterozoic; Neoproterozoic; Niquelândia; Rift; SHRIMP U-PbSHRIMP U-Pb and Sm-Nd ages of the Niquelândia layered complex: Meso- (1.25 Ga) and Neoproterozoic (0.79 Ga) extensional events in central Brazil200410.1016/j.precamres.2004.02.0092015-12-12