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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. (200cuatro 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 D_1+dos 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 (D_1+dos) and was folded by the megascale F₃-folds ( Fig. 4E).

Even when one of them plutons mix-slice the CFTD within the NW tip, the latest Silva Jardim Pluton, dated 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 dating apps voor introverten 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. ).

About surrounding Chinese language Terrane ( Figs. dos and you will 3), there are also metamorphic age california. 550 – 510 Ma ( Schmitt et al. 2004 Schmitt R.S., Trouw R.A great.J., Van Schmus W.Roentgen., Pimentel Meters.M. 2004. Late amalgamation regarding the central section of Western Gondwana: the brand new geochronological studies while the characterization out of a beneficial Cambrian collisional orogeny regarding Ribeira Gear (SE Brazil). Precambrian Search , -61. , 2012a Schmitt Roentgen.S., Mendes J.C., Peternel R., Silva L.C., Dantas E.L. 2012a. : SSAGI, Medellin, Colombia. ; Fernandes ainsi que al. 2015 Fernandes G.L., Schmitt R.S., Bongiolo Age., Mendes J.C., Basei Meters. 2015. Unraveling new tectonic evolution out of an effective Neoproterozoic-Cambrian productive margin regarding Ribeira Orogen (SE Brazil): U-Pb and you will Lu-Hf provenance analysis. Precambrian Search , -360. ). In addition, some plutons with age regarding 510 in order to 480 Ma intrude so it terrane and are also interpreted as blog post-tectonic ( Valeriano ainsi que al. 2011 Valeriano C.Meters., Tupinamba M., Simonetti An excellent., Heilbron Meters., Almeida J.C.H., Eirado L.Grams. 2011. U-Pb Los angeles-MC-ICPMS geochronology out-of Cambro-Ordovician blog post-collisional granites of one’s Ribeira belt, the southern part of Brazil: terminal Brasiliano magmatism during the main Gondwana supercontinent. Diary out of South Western Planet Sciences , -428. ). dos and step 3) ( Moraes 2009 Moraes J.Yards. 2009. Geologia do Granito Silva Jardim (RJ): Implicacoes na evolucao tectonica dos Terrenos Chinese language age Cabo Frio. Grasp Thesis UERJ. 65 p. ). Which pluton gift ideas a type igneous foliation and is considered a late-collisional magmatic human body ( Moraes 2009 Moraes J.Yards. 2009. Geologia carry out Granito Silva Jardim (RJ): Implicacoes na evolucao tectonica 2 Terrenos Chinese language age Cabo Frio. Grasp Thesis UERJ. 65 p. ). The latest youngest magmatic intrusions registered on CFTD within the Paleozoic is article tectonic pegmatites and you can granites of california. 440 Ma dated having U-Pb in zircon ( Schmitt ainsi que al. 2004 Schmitt R.S., Trouw Roentgen.A great.J., Van Schmus W.R., Pimentel M.Yards. 2004. Late amalgamation from the main element of Western Gondwana: the fresh geochronological data as well as the characterization of an excellent Cambrian collisional orogeny regarding the Ribeira Belt (SE Brazil). Precambrian Research , -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 of pegmatites and drinks from the Ponta Negra (RJ, Brazil) during the later- to publish-collisional degree of your own Gondwana Set up. Lithos , -275. ).