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The deformation and high grade metamorphism responsible for the tectonic inversion of the sedimentary basin is attributed to an orogenic event of Cambrian age. Schmitt et al. (2004 Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Pimentel M.M. 2004. Late amalgamation in the central part of West Gondwana: new geochronological data and the characterization of a Cambrian collisional orogeny in the Ribeira Belt (SE Brazil). Precambrian Research , -61. , 2008b Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Passchier C.W. 2008b. Cambrian orogeny in the Ribeira Belt (SE Brazil) and correlations within West Gondwana: ties that bind underwater. : Pankhurst R.J., Trouw R.A.J., Brioto Neves B.B., De Wit M.J. (eds.) West Gondwana: Pre-Cenozoic Correlations across the South Atlantic Region . Geological Society, London , Special Publications, -296. ) dated the D₁₊₂ syntectonic leucosome from both basement and supracrustals, and defined a ca. 5step three0 Ma tectonometamorphic event related to a convergent margin that culminated with a continental collision (Buzios Orogeny). This partial melt product was generated during the metamorphic peak (D₁₊₂) and was folded by the megascale F₃-folds ( Fig. 4E).

Even though one among these plutons mix-slice the CFTD within the NW tip, the latest Silva Jardim Pluton, old on 505 Ma ( Figs

In the basement, the lower intercepts of the U-Pb discordia lines are in the interval between 600 and 450 Ma, consistent with this event ( Schmitt et al. 2004 Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Pimentel M.M. 2004. Late amalgamation in the central part of West Gondwana: new geochronological data and the characterization of a Cambrian collisional orogeny in the Ribeira Belt (SE Brazil). Precambrian Research , -61. , 2008b Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Passchier C.W. 2008b. Cambrian orogeny in the Ribeira Belt (SE Brazil) and correlations within West Gondwana: ties that bind underwater. : Pankhurst R.J., Trouw R.A.J., Brioto Neves B.B., De Wit M.J. (eds.) West Gondwana: Pre-Cenozoic Correlations across the South Atlantic Region . Geological Society, London , Special Publications, -296. ). The metamorphic rims of the Paleoproterozoic zircon grains in the shear zones are dated at ca. 505 Ma ( Schmitt et al. 2008b Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Passchier C.W. 2008b. Cambrian orogeny in the Ribeira Belt (SE Brazil) and correlations within West Gondwana: ties that bind underwater. : Pankhurst R.J., Trouw R.A.J., Brioto Neves B.B., De Wit M.J. (eds.) West Gondwana: Pre-Cenozoic Correlations across the South Atlantic Region . Geological Society, London , Special Publications, -296. ). In the supracrustals, all metamorphic minerals are formed during the Cambrian (ca. 530 Ma). Zircon, monazite, sphene and rutile were dated and yielded a metamorphic time interval between 525 and 510 Ma for the eastern CFTD and 505 – 490 Ma for the western CFTD ( Schmitt et al. 2004 Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Pimentel M.M. 2004. Late amalgamation in the central part of West Gondwana: new geochronological data and the characterization of a Cambrian collisional orogeny in the Ribeira Belt (SE Brazil). Precambrian Research , -61. ). The occurrence of a late F₄-reclined megascale fold in the western region could partially explain this ( Fig. 3). These younger ages could indicate that units in this region stayed deeper in the crust and the D₄ deformational phase would bring them up later. The cooling rate calculated for the eastern part of CFTD is rapid until ca. 510 Ma (more than 20 o C/Ma), and after this diminishes to 5 – 10 o C/Ma ( Schmitt et al., 2004 Schmitt R.S., Trouw R.A.J., Van Schmus W.R., Pimentel M.M. 2004. Late amalgamation in the central part of West Gondwana: new geochronological data and the characterization of a Cambrian collisional orogeny in the Ribeira Belt (SE Brazil). Precambrian Research , -61. ).

From the surrounding Chinese language Terrane ( Figs. 2 and 3), there are even metamorphic period of california. 550 – 510 Ma ( Schmitt mais aussi al. 2004 Schmitt Roentgen.S., Trouw R.A great.J., Van Schmus W.Roentgen., Pimentel M.Yards. 2004. Late amalgamation on the central element of West Gondwana: brand new geochronological analysis and the characterization of a beneficial Cambrian collisional orogeny about Ribeira Strip (SE Brazil). Precambrian Look , -61. , 2012a Schmitt R.S., Mendes J.C., Peternel R., Silva L.C., Dantas Age.L. 2012a. : SSAGI, Medellin, Colombia. ; Fernandes et al. 2015 Fernandes G.L., Schmitt R.S., Bongiolo E., Mendes J.C., Basei Meters. 2015. Unraveling the tectonic progression off a beneficial Neoproterozoic-Cambrian productive margin in the Ribeira Orogen (SE Brazil): U-Pb and you will Lu-Hf provenance studies. Precambrian Browse , -360. ). In addition, a few plutons that have years out of 510 so you can 480 Ma intrude so it terrane and therefore are translated because blog post-tectonic ( Valeriano ainsi que al. 2011 Valeriano C.Meters., Tupinamba Yards., Simonetti An effective., Heilbron M., Almeida J.C.H., Eirado L.Grams. 2011. U-Pb La-MC-ICPMS geochronology from Cambro-Ordovician blog post-collisional granites of Ribeira belt, the southern part of Brazil: terminal Brasiliano magmatism during the central Gondwana supercontinent. Diary of Southern American Planet Sciences , -428. ). dos and you will step three) senior sizzle profil ( Moraes 2009 Moraes J.Yards. 2009. Geologia perform Granito Silva Jardim (RJ): Implicacoes na evolucao tectonica 2 Terrenos Oriental elizabeth Cabo Frio. Master Thesis UERJ. 65 p. ). It pluton gifts an established igneous foliation which is thought an excellent late-collisional magmatic looks ( Moraes 2009 Moraes J.Yards. 2009. Geologia carry out Granito Silva Jardim (RJ): Implicacoes na evolucao tectonica dos Terrenos Oriental e Cabo Frio. Master Thesis UERJ. 65 p. ). The youngest magmatic intrusions entered throughout the CFTD inside the Paleozoic are article tectonic pegmatites and granites regarding ca. 440 Ma old having You-Pb in zircon ( Schmitt mais aussi al. 2004 Schmitt Roentgen.S., Trouw Roentgen.Good.J., Van Schmus W.Roentgen., Pimentel M.M. 2004. Later amalgamation on main section of West Gondwana: brand new geochronological research therefore the characterization off good Cambrian collisional orogeny on the Ribeira Belt (SE Brazil). Precambrian Look , -61. , Bongiolo ainsi que al. 2015 Bongiolo Elizabeth., Renac C., D’Almeida de Toledo P., Schmitt R.S., Faulstich F.Roentgen.L., Mexias , Silva F.P.C. 2015. Provider regarding pegmatites and you may fluids from the Ponta Negra (RJ, Brazil) through the later- to publish-collisional level of your own Gondwana Set-up. Lithos , -275. ).