U–Pb SHRIMP ages for the Cerro Bori Orthogneisses, Dom Feliciano Belt in Uruguay: Evidences of a ∼800Ma magmatic and ∼650Ma metamorphic event

The Brasiliano collage in South America: a review

“…676 Ma, implying in a complete accretionary and collisional history before the emplacement of the Pelotas-Aiguá batholith, preceding, therefore, all other accretionary processes related with the climax of the Brasiliano orogeny. Lenz et al (2011) suggested an early Brasiliano event (or Brasiliano I), following the earlier proposal by Silva et al (2005). Despite the small size of this area (ca.…”

“…Tonalite and granodiorite gneisses, mafic and felsic granulites and amphibolite are the dominant rock types (Lenz et al 2011). Petrological, geochemical and isotopic data confirm magmatic arc affiliation.…”

The Nico Pérez Terrane (Uruguay): From Archean crustal growth and connections with the Congo Craton to late Neoproterozoic accretion to the Río de la Plata Craton

“…1 and 2), contains zircons yielding U-Pb SHRIMP concordant ages of 750-800 Ma (Hartmann et al, 2002;Oyhantçabal et al, 2009a;Basei et al, 2011;Lenz et al, 2011). This was interpreted as evidence of Cryogenian rifting-related magmatism during Rodinia break-up, allowing correlations with the Coastal Terrane in the Kaoko Belt (Kröner et al, 2004;Oyhantçabal et al, 2009a;Basei et al, 2011;Frimmel et al, 2011;Rapela et al, 2011;Konopásek et al, 2014).…”

“…Furthermore, both regions underwent high-grade metamorphism at ca. 650-630 Ma (Goscombe et al, 2005;Goscombe and Gray, 2007;Konopásek et al, 2008;Gross et al, 2009;Oyhantçabal et al, 2009a;Basei et al, 2011;Lenz et al, 2011), which indicates an arc/back-arc domain at the attenuated Congo Craton margin Gray, 2007, 2008;Konopásek et al, 2014). Hence, the African crustal affinity of the Nico Pérez Terrane together with correlations between the Cerro Olivo Complex and the Coastal Terrane point to Cryogenian rifting of the Nico Pérez Terrane from the Congo Craton margin (Figs.…”

Detrital zircon U–Pb ages and Hf-isotope systematics from the Gadag Greenstone Belt: Archean crustal growth in the western Dharwar Craton, India

“…Others have multiple growth histories, exhibiting complex structures with igneous cores mantled by low-luminescence, weakly-zoned or structureless rims, indicative of probable tectonothermal event(s) in the source region between zircon formation and zircon erosion and transport to become part of the greywackes. The detailed resolution of overprinting zircon growth events (cf Lenz et al, 2011) within detrital grains is outside the scope of this study.…”