Pampia: A large cratonic block missing in the Rodinia supercontinent

A history of Proterozoic terranes in southern South America: From Rodinia to Gondwana

“…This ocean was named by Trindade et al (2006), who argued on the basis of paleomagnetism for such a Late Neoproterozoic ocean between Amazonia þ Laurentia on the one hand and West Gondwana cratons, such as Rio de la Plata and Kalahari, on the other. As an alternative to the Pampia model of Ramos (1988) and Ramos et al (2010), we envisage that MARA was attached to the former continental mass and that the closure of this ocean led to the Pampean orogeny . 570 Ma is just within error of the Sm-Nd age of 647 AE 77 Ma for alleged Pampean ophiolite relics (whole-rock errorchron with MSWD Z 7.6), obtained by Escayola et al (2007).…”

Accretion of Grenvillian terranes to the southwestern border of the Río de la Plata craton, western Argentina

“…The autochthonous western border of Gondwana surrounding the Río de la Plata craton is the locus of the Late Neoproterozoic to Early Cambrian Pampean orogeny ( Fig. 1), partly involved in the Pampia terrane Ramos et al 2010), and successively affected by regional metamorphism, deformation, and arc magmatism of the Late Cambrian to Devonian, Famatinian orogeny, together with the allochthonous terranes arriving further west.…”

An overview of the Mesozoic-Cenozoic magmatism and tectonics in Eastern Paraguay and central Andes (Western Gondwana): Implications for the composition of mantle sources

“…The last terranes, named Chilenia by Ramos et al (1984), were accreted to the proto-margin of the Andes during the late Devonian-early Carboniferous. This collisional event is connected with the emplacement of the plutonic bodies (397-264 Ma) over the Pampia and Antofalla cratons (Damm et al, 1990;Sims et al, 1998;Ramos et al, 2010;Spagnuolo et al, 2012;Ramos et al, 2015). During the Triassic-lower Jurassic, the southern Gondwana margin was affected by magmatism (230-180 Ma) with huge volcanic eruptions and pluton emplacement (Kay et al, 1989;Turner, 1999).…”