The Fazenda Gavião Granodiorite And Associated Potassic Plutons As Evidence For Palaeoproterozoic Arc-continent Collision In The Rio Itapicuru Greenstone Belt, Brazil

Several granitic plutons have intruded the Palaeoproterozoic Rio Itapicuru greenstone belt, São Francisco craton, Brazil, in the time interval 2163-2080 Ma, but their tectonic significance is poorly understood. The Fazenda Gavião granodiorite (FGG) is one of a set of plutons emplaced along the western boundary of the greenstone belt with Archaean migmatite-gneiss basement. The pluton is mostly composed of hornblende granodiorite, occasionally crosscut by syn-plutonic mafic dykes. The FGG is metaluminous, medium- to high-K calc-alkaline with relatively constant silica abundances (SiO2 ~ 63-66 wt%), high Sr (900-800 ppm) and high Ba (1000-1500 ppm). The associated mafic dykes are ultrapotassic, with high abundances of Ba, Sr, MgO, Ni, Cr, and light rare earth elements, suggesting derivation from partial melts of an enriched mantle source. The FGG originated probably by fractional crystallization from a primitive K-rich mafic magma that interacted with crustal melts. Its zircon U-Pb SHRIMP age of 2106 ± 6 Ma indicates that the FGG is younger than the early (2163-2127 Ma) tonalite-trondhjemite-granodiorite (TTG) and calc-alkaline arc plutons of the greenstone belt, and is closely related in time and space with potassic to ultrapotassic plutons (ca. 2110-2105 Ma). The negative εNd(t) of FGG and coeval K-rich plutons of the Rio Itapicuru greenstone belt contrasts markedly with the positive εNd(t) of the older arc plutons, indicating a major change of isotope signatures in granites of the Rio Itapicuru greenstone belt with time. This isotope shift may be related to magma contamination with older continental material and/or derivation of the parental potassic magma from enriched lithospheric mantle sources. We suggest that the K-rich plutons were emplaced during or shortly after Palaeoproterozoic arc-continent collision. © 2011 Elsevier Ltd.322127141Alves da Silva, F.C., (1994), p. 340. , Étude structurale du Greenstone Belt Paleoproterozoique du Rio Itapicuru (Bahia, Brésil), Unpublished PhD Thesis. Géosciences, Université d'Orleans, OrleansAtherton, M.P., Ghani, A.A., Slab breakoff: a model for Caledonian, late granite syn-collisional magmatism in the orthotectonic (metamorphic) zone of Scotland and Donegal, Ireland (2002) Lithos, 62, pp. 65-85Barbarin, B., Mafic magmatic enclaves and mafic rocks associated with some granitoids of the central Sierra Nevada batholith, California: nature, origin, and relations with the hosts (2005) Lithos, 80, pp. 155-177Barbosa, J.S.F., Sabaté, P., Archaean and Palaeoproterozoic crust of the São Francisco Craton, Bahia, Brazil: geodynamic features (2004) Precambrian Research, 133, pp. 1-27Barrueto, H.R., (2002), p. 188. , Petrogênese das intrusões compostas de Teofilândia e Barrocas, Greenstone Belt do Rio Itapicuru, Bahia, Brasil, Unpublished PhD. Thesis. Geosciences Institute (IG), State University of Campinas (UNICAMP)Barrueto, H.R., Oliveira, E.P., Dall'Agnol, R., (1998) Trace Element and Nd Isotope Evidence for Juvenile, Arc Related Granitoids in the Southern Portion of the Palaeoproterozoic Rio Itapicuru Greenstone Belt (RIGB), Bahia, Brazil, 40, p. 520. , Congresso Brasileiro de GeologiaBateman, R., On the role of diapirism in the segregation, ascent and final emplacement of granitoid magmas - replay (1986) Tectonophysics, 127, pp. 167-169Beakhouse, G.P., Davis, D.W., Evolution and tectonic significance of intermediate to felsic plutonism associated with the Hemlo greenstone belt, Superior Province, Canada (2005) Precambrian Research, 137, pp. 61-92Bell, K., Castorina, F., Lavecchia, G., Rosatelli, G., Stoppa, F., Is there a mantle plume below Italy? EOS Transactions (2004) American Geophysical Union, 85, pp. 541-547Blein, O., Lapierre, H., Schweicker, R.A., A Permian island-arc with a continental basement: the Black dyke formation (Nevada), North American Cordillera (2001) Chemical Geology, 175, pp. 543-566Blein, O., Lapierre, H., Schweickert, R.A., Pecher, A., Reynaud, C., Volcanisme triasique calco-alcalin a shoshonitique du Nevada occidental (2001) Bulletin de la Societe Geologique de France, 172, pp. 189-200Brown, D., Spadea, P., Puchkov, V., Alvarez-Marron, J., Herrington, R., Willner, A.P., Hetzel, R., Gorozhanina, Y., Arc-continent collision in the Southern Urals (2006) Earth Science Reviews, 79, pp. 261-287Carvalho, M.J., Oliveira, E.P., Geologia do Tonalito Itareru, Bloco Serrinha, Bahia: uma intrusão sin-tectônica do início da colisão continental no Segmento Norte do Orógeno Itabuna-Salvador-Curaçá (2003) Revista Brasileira de Geociências, 33, pp. 55-68Castro, A., On granitoid emplacement and related structures. A review (1987) Geologische Rundschau, pp. 101-124Chauvet, A., Alves da Silva, F.C., Faure, M., Guerrot, C., Structural evolution of the Paleoproerozóic Rio Itapicuru granite- greenstone belt (Bahia, Brazil): the role of synkinematic plutons in the regional tectonics (1997) Precambrian Research, 84, pp. 139-162Chen, B., Jahn, B., Arakawa, Y., Zhai, M., Petrogenesis of the Mesozoic intrusive complexes from the southern Taihang orogen, North China craton: elemental and Sr-Nd-Pb isotopic constraints (2004) Contribution to Mineralogy and Petrology, 148, pp. 489-501Chew, D.M., Graham, J.R., Whitehouse, M.J., U-Pb zircon geochronology of plagiogranites from the Lough Nafooey (=Midland Valley) arc in western Ireland: constraints on the onset of the Grampian orogeny (2007) Journal of the Geological Society, 164, pp. 747-750. , LondonChung, S.L., Wang, K.L., Crawford, A.J., Kamenetsky, V.S., Chen, C.H., Lan, C.Y., Chen, C.H., High-Mg potassic rocks from Taiwan: implications for the genesis of orogenic potassic lavas (2001) Lithos, 59, pp. 153-170Clift, P.D., Schouten, H., Draut, A.E., A general model of arc-continent collision and subduction polarity reversal from Taiwan and the Irish Caledonides (2003) Journal of the Geological Society, London, Special Publications, 219, pp. 81-98. , R.D. Larter, P.T. Leat (Eds.) Intra-oceanic subduction systems: tectonic and magmatic processesCompston, W., Kinny, P.D., Williams, I.S., Foster, J.J., The age and Pb loss behaviour of zircons from the Isua supracrustal belt as determined by ion microprobe (1986) Earth and Planetary Science Letters, 80, pp. 71-78Compston, W., Williams, I.S., Meyer, C., U-Pb geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobe (1984) Journal of Geophysical Research, 89, pp. 252-534Conceição, H., Rios, D.C., Rosa, M.L.S., Davis, D.W., Dickin, A.P., McReath, I., Marinho, M.M., Macambira, M.J.B., Zircon geochronology and petrology of alkaline-potassic syenites, southwestern Serrinha Nucleus, East São Francisco Craton, Brazil (2002) International Geology Review, 44, pp. 117-136Conticelli, S., Peccerillo, A., Petrology and geochemistry of potassic and ultrapotassic volcanism in central Italy: petrogenesis and inferences on the evolution of the mantle sources (1992) Lithos, 28, pp. 221-240Corriveau, L., Proterozoic subduction and terrane amalgamation in the southwestern Grenville province, Canada: evidence from ultrapotassic to shoshonitic plutonism (1990) Geology, 15, pp. 614-617Corriveau, L., Gorton, M.P., Coexisting K-rich alkaline and shoshonitic magmatism arc affinities in the Proterozoic: a reassessment of syenitic stocks in the southwestern Grenville province (1993) Contribution to Mineralogy and Petrology, 113, pp. 262-279Costa, F.G., Oliveira, E.P., The Fazenda Gavião high-Ba-Sr granodiorite and coeval K-rich plutons as igneous record of arc-continent collision in the Rio Itapicuru greenstone belt, São Francisco Craton, Brazil (2008) 33th International Geological Congress, 2008, OsloCosta, F.G., (2008), Petrogênese do granodiorito Fazenda Gavião: registro de uma colisão arco-continente no greenstone belt do Rio Itapicuru, Craton do São Francisco, Bahia. Master Dissertation, Geosciences Institute, University of CampinasCottam, M., Hall, R., Cross, L., Clements, B., Spakman, W., Neogene subduction beneath Java, Indonesia: slab tearing and changes in magmatism (2010) EGU General Assembly, Geophysical Research Abstracts, 12, pp. EGU2010-12437Cruz Filho, B.E., Conceição, H., Rios, D.C., Rosa, M.L.S., Marinho, M.M., Geologia, petrografia e litogeoquímica do batólito trondhjemítico Nordestina, Núcleo Serrinha, Nordeste da Bahia (2003) Revista Brasileira de Geociências, 33, pp. 175-186. , (in Portuguese with English abstract)Cruz Filho, B.E., Conceição, H., Rios, D.C., Rosa, M.L.S., Marinho, M.M., Geocronologia e Assinatura Isotópica (Rb-Sr e Sm-Nd) do Batólito Trondhjemítico Nordestina, Núcleo Serrinha, Nordeste do Estado da Bahia (2005) Revista Brasileira de Geociências, 35, pp. 1-8. , (in Portuguese with English abstract)Davies, J.H., von Blanckenburg, F., Slab breakoff: a model of lithospheric detachment and its test in the magmatism and deformation of collisional orogens (1995) Earth and Planetary Science Letters, 129, pp. 85-102Davison, I., Teixeira, J.B.G., Silva, M.G., Rocha Neto, M.B., Matos, F.M.V., The Rio Itapicuru Greenstone Belt, Bahia, Brazil: Struture and stratigraphical outline (1988) Precambrian Research, 42, pp. 1-17Defant, M.J., Drummond, M.S., Derivation of some modern arc magmas by melting of young subducted lithosphere (1990) Nature, 347, pp. 662-665DePaolo, D.J., (1988) Neodymium Isotope Geochemistry: An Introduction, , Springer Verlag, New YorkDonatti Filho, J.P., Oliveira, E.P., (2007) The tectonic setting of basalts from the Rio Itapicuru Greenstone Belt, Bahia, revisited by trace-element geochemistry, p. 296. , XI Simpósio Nacional de Estudos Tectônicos SNET, NatalDraut, A.E., Clift, P.D., Hannigan, R.E., Layne, G., Shimizu, N., A model for continental crust genesis by arc accretion: rare earth element evidence from the Irish Caledonides (2002) Earth Planetary Science Letters, 203, pp. 3-4Draut, A.E., Clift, P.D., Geochemical evolution of arc magmatism during arc-continent collision, South Mayo, Ireland (2001) Geology, 29, pp. 543-546Draut, A.E., Clift, P.D., Amato, J.M., Blusztajn, J., Schouten, H., Arc-continent collision and the formation of continental crust: a new geochemical and isotopic record from the Ordovician Tyrone igneous complex, Ireland (2009) Journal of the Geological Society, 166, pp. 485-500. , LondonDraut, A.E., Clift, P.D., Chew, D.M., Coopers, M.J., Taylor, R.N., Hannigan, R.E., Laurentian crustal recycling in the Ordovician Grampian Orogeny: Nd isotopic evidence from western Ireland (2004) Geological Magazine, 141, pp. 195-207Elburg, M., Leeuwen, T.V., Foden, J., Spatial and temporal isotopic domains of contrasting igneous suites in western and northern Sulawesi, Indonesia (2003) Chemical Geology, 199, pp. 243-276. , MuhardjoElburg, M.A., Foden, J., Temporal changes in arc magma geochemistry, northern Sulawesi, Indonesia (1998) Earth Planetary Science Letters, 163, pp. 381-398Elburg, M.A., Van Leeuwen, T., Foden, J., Origin of geochemical variability by arc-continent collision in the Biru area, southern Sulawesi (Indonesia) (2002) Journal of Petrology, 43, pp. 581-606. , MujardoElburg, M.A., Foden, J.D., Van Bergen, M.J., Zulkarnain, I., Australia and Indonesia in collision: geochemical sources of magmatism (2005) Journal of Volcanology and Geothermal Research, 140, pp. 25-47Fowler, M.B., Henney, P.J., Mixed Caledonian appinite magmas: implication for lamprophyre fractionation and high Ba-Sr granites genesis (1996) Contribution to Mineralogy and Petrology, 126, pp. 199-215Fowler, M.B., Henney, P.J., Darbyshire, D.P.F., Greenwood, P.B., Petrogenesis of high Ba-Sr granites: the Rogart pluton, Sutherland (2001) Journal of the Geological Society, 158, pp. 521-534. , LondonFowler, M.B., Kocks, H., Darbyshire, D.P.F., Greenwood, P.B., Petrogenesis of high Ba-Sr plutons from the northern highlands terrane of the British Caledonian province (2008) Lithos, 105, pp. 129-148Frost, B.R., Barnes, C.G., Collins, W.J., Arculus, R.J., Ellis, D.J., Frost, C.D., A geochemical classification for granitic rocks (2001) Journal of Petrology, 32, pp. 2033-2048Gasperini, D., Blichert-Toft, J., Bosh, D., Del Moro, A., Macera, P., Albarède, F., Upwelling of deep mantle material through a plate window: evidence from geochemistry of Italian basaltic volcanics (2002) Journal of Geophysical Research, 107, pp. 2367-2386Gioia, S.M.C.L., Pimentel, M.M., The Sm-Nd isotopic method in the geochronology laboratory of the university of Brasília (2000) Anais da Academia Brasileira de Ciências, 72, pp. 219-245Gordienko, I.V., Filimonov, A.V., Minina, O.R., Gornova, M.A., Medvedev, A.Y., Klimuk, V.S., Elbaev, A.L., Tomurtogoo, O., Dzhida island-arc system in the Paleoasian Ocean: structure and main stages of Vendian-Paleozoic geodynamic (2007) Russian Geology and Geophysics, 49, pp. 91-106Grisólia, M.F., (2010), p. 95. , Proveniência de rochas sedimentares do greenstone belt do Rio Itapicuru, Bahia. Master Dissertation, Geosciences Institute, University of CampinasGroves, D.I., Goldfarb, D.A., Gebre-MarianHagemann, S.G., Robert, F., Orogenic gold deposits: a proposed classification in the context of their crustal distribution and relationship to other gold deposits types (1998) Ore Geology Reviews, 13, pp. 7-27Hou, Z.Q., Gao, Y.F., Qu, X.M., Mo, X.X., Origin of adakites intrusives generated during Mid-Miocene east-west extension in southern Tibet (2004) Earth and Planetary Science Letters, 220, pp. 139-155Housh, T., McMahon, T.P., Ancient isotopic characteristics of Neogene potassic magmatism in western New Guinea Irian Jaya, Indonesia (2000) Lithos, 50, pp. 217-239Huang, C.Y., Yuan, P.B., Tsao, S.J., Temporal and spatial records of an active arc-continent collision in Taiwan: a synthesis (2006) Geological Society of American Bulletin, 118, pp. 274-288Hutton, D.H.W., Granite emplacemnt mechanisms and tectonic controls: inferences from deformation studies (1988) Transaction of Royal Society of Edinburgh Earth Sciences, 79, pp. 245-253Kishida, A., Riccio, L., Chemostratigraphy of lava sequences from the Rio Itapicuru greenstone belt, Bahia, Brazil (1980) Precambrian Research, 11, pp. 161-178Lacerda, C.M.M., (2000), p. 174. , Evolução Estrutural e Petrogenética do Domo Granodiorítico de Ambrósio, Greenstone Belt do Rio Itapicuru, Bahia. Unpublished PhD. Thesis, Geosciences Institute (IG), State University of Campinas (UNICAMP)Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, L., Bas, M.J., Sabine, P.A., Zanettin, B., (1989) A Classification of Igneous Rock and a Glossary of Terms, , Blackwell, OxfordLobach-Zhuchenko, S.B., Rollinson, H., Chekulaev, V.P., Arestova, N.A., Kovalenko, A.V., Ivanikov, V.V., Guseva, N.S., Jarvis, K.E., The Archaean sanukitoid series of the Baltic shield geological setting, geochemical characteristics and implications for their origin (2005) Lithos, 79, pp. 107-128Maniar, P.D., Piccoli, P.M., Tectonics discrimination of granitoids (1989) Geological Society of American Bulletin, 101, pp. 635-646Martin, H., Adakitic magmas: modern analogs of Archaean granitoids (1999) Lithos, 46, pp. 411-429Martin, H., Smithies, R.H., Rapp, R., Moyen, J.-F., Champion, D., An overview of adakite, TTG and sanukitoid: relationships and some implications for crustal evolution (2005) Lithos, 79, pp. 1-24McDonough, W.F., Sun, S., Ringwood, A.E., Jagoutz, E., Hofman, A.W.K., Rb and Cs in the earth and moon and the evolution of the earth's mantle (1992) Geochimica et Cosmochimica Acta, 56, pp. 1001-1012Mello, E.F., (2000), p. 163. , Estudos isotópicos do greenstone belt do Rio Itapicuru, BA: evolução crustal e metalogenia do ouro. Unpublished PhD. Thesis, Geosciences Institute (IG), State University of Campinas (UNICAMP)Mello, E.F., Xavier, R.P., McNaughton, N.J., Hagemann, S.G., Fletcher, I., Snee, L., Age constraints on felsic intrusions, metamorphism and gold mineralization in the Palaeoproterozoic Rio Itapicuru greenstone belt, NE Bahia State, Brazil (2006) Mineralium Deposita, 40, pp. 849-866Müller, D., Rock, N.M., Groves, D.I., Geochemical discrimination between shoshonitic and potassic volcanic rocks in different tectonic settings: a pilot study (1992) Mineralogy and Petrology, 46, pp. 259-289Musumeci, G., Magmatic belts in accretionary margins, a key for tectonic evolution: the tonalite belt of North Victoria Land (East Antarctica) (1999) Journal of the Geological Society, 156, pp. 177-189. , LondonNascimento, H.S., (1996), p. 205. , Evolucão Petrogenética da intrusão ácido-básica de Cansanção. Unpublished M.S. Thesis. Federal University of BahiaNascimento, H.S., Bouchez, J.L., Nédélec, A., Sabaté, P., Evidence of an early NS magmatic event in the Palaeoproterozoic Teofilândia granitoids (São Francisco Craton, Brazil): a combined microstructural and magnetic fabric study (2004) Precambriam Research, 134, pp. 41-59Navarro, M.S., (2004), A implantação de rotina, e seu refinamento, para a determinação de elementos terras raras em materiais geológicos por ICP-OES e ICP-MS. Aplicação ao caso dos granitóides de Piedade-Ibiúna (SP) e CunhOliveira, E.P., The late Archaean Uauá mafic dyke Swarm, São Francisco craton, Brazil, and implications for Palaeoproteozoic extrusion tectonics and orogen Reconstruction (2011) Dyke swarms: Keys for Geodynamic Interpretation, pp. 19-31. , Springer-Verlag, Heidelberg, R.K. Srivastava (Ed.)Oliveira, E.P., Carvalho, M.J., McNaughton, N., Evolução do segmento norte do Orógeno Itabuna-Salvador-Curaçá: cronologia da acresção de arcos, colisão continental e escape de terrenos. Revista Geologia USP (2004) Série Científica, 4, pp. 41-53Oliveira, E.P., Grisólia, M.F., Moretto, C., Donatti Filho, J.P., McNaughton, N., Vale, I.Z., (2010) Descoberta de um Complexo de Fore-arc Paleoproterozóico no Greenstone Belt do Rio Itapicuru, Bahia, e Implicações Geodinâmicas, , 45 Congresso Brasileiro de Geologia, Belém. Simpósio SP02 - Evolução de Terrenos Paleoproterozóicos e Mesoproterozóicos, PAP65Oliveira, E.P., McNaughton, N.J., Armstrong, R., Mesoarchaean to Palaeoproterozoic growth of the northern Segment of the Itabuna-Salvador-Curaçá orogen, São Francisco craton, Brazil (2010) Journal of the Geological Society, London, Special Publication, 338, pp. 263-286. , T. Kusky, Z. Mingguo, Z. Xiao (Eds.) The Evolving Continents: Understanding Processes of Continental GrowthOliveira, E.P., Mello, E.F., McNaughton, N., Reconnaissance U-Pb geocronology of early Precambrian quartzites from the Caldeirão belt and their basement, NE São Francisco craton, Bahia, Brazil: implication for the early evolution of the Palaeoproterozoic Salvador-Curaçá orogen (2002) Journal of South American Earth Science, 15, pp. 349-362Oliveira, E.P., Souza, Z.S., McNaughton, N.J., Lafon, J.-M., Costa, F.G., Figueiredo, A.M., The Rio Capim volcanic-Plutonic-Sedimentary belt, São Francisco craton, Brazil: geological, geochemical and isotopic evidence for oceanic arc accretion during Palaeoproterozoic continental collision (2011) Gondwana Research, 19, pp. 735-750Oliveira, E.P., Windley, B.F., McNaughton, N., Pimentel, M., Fletcher, I.R., Contrasting copper and chromium metallogenic evolution of terranes in the Palaeoproterozoic Itabuna-Salvador-Curaçá Orogen, São Francisco Craton, Brazil: new zircon (SHRIMP) and Sm-Nd (model) ages and their significance for orogen-parallel escape tectonics (2004) Precambrian Research, 128, pp. 143-165Patchett, P.J., Ruiz, J., Nd isotope ages of crust formation and metamorphism in the Precambrian of eastern and southern Mexico (1987) Contribution to Mineralogy and Petrology, 96, pp. 523-528Pearce, J.A., Sources and settings of granitic rocks (1996) Episodes, 19, pp. 120-125Pearce, J.A., Harris, N.B.W., Tindle, A.G., Trace elements discrimination diagrams for the tectonic interpretation of granitic rocks (1984) Journal of Petrology, 25, pp. 956-983Peccerillo, A., Roman Comagmatic province (Central Italy): evidence for subduction related magma genesis (1985) Geology, 13, pp. 103-106Peccerillo, A., Plio-Quaternary magmatism in Italy (2003) Episodes, 26, pp. 222-226Peixoto, A.A., (2000), p. 135. , Petrografia, litogeoquímica e idade do magmatismo alcalino metaluminoso a peraluminoso e tardio da parte sudoeste do Núcleo Serrinha (Bahia): Granitos Tipo Morro do Lopes. Unpublished M.S. Thesis. Federal University of BahiaPicher, W.S., (1993) The nature and origin of granite, , Black Academic & Profissional, An Imprint of Chapmam & HallPimentel, M.M., Silva, M.G., Sm-Nd age of the Fazenda Brasileiro gabbro, Bahia, Brazil: example of robust behavior of the Sm-Nd isotopic system under extreme hydrothermal alteration (2003) Anais da Acadêmia Brasileira de Ciências, 75, pp. 383-392Plá, C.J., Rios, D.C., Conceição, H., Petrogenesis of mica-amphibole-bearing lamprophyres associated with the Palaeoproterozoic Morro do Afonso syenite intrusion, eastern Brazil (2006) Journal of South American Earth Science, 22, pp. 98-115Polvé, M., Maury, R.C., Bellon, H., Rangin, C., Priadi, B., Yuwono, S., Joron, J.L., Soefia Atmadja, R., Magmatic evolution of Sulawesi (Indonesia): constraints on the Cenozoic geodynamic history of the Sundaland active margin (1997) Tectonophysics, 272, pp. 69-92Qin, J.F., Lai, S.C., Diwu, C.R., Ju, Y.J., Li, Y.F., Magma mixing origin for the post-collisional adakitic monzogranite of the Triassic Yangba pluton, Northwestern margin of the South China block: geochemistry, Sr-Nd isotopic, zircon U-Pb dating and Hf isotopic evidences (2010) Contribution to Mineralogy and Petrology, 159, pp. 389-409Quian, Q., Chung, S.L., Lee, T.Y., Wen, D.J., Mesozoic high Ba-Sr granitoids from North China: geochemical characteristics and geological implications (2003) Terra Nova, 15, pp. 272-278Rios, D.C., (2002), p. 239. , Granitogênese no Núcleo Serrinha, Bahia, Brasil: Geocronologia e Litogeoquímica. Unpublished PhD. Thesis. Federal University of BahiaR