Search Results - "Lafon, Jean Michel"

Constraints on the source and petrogenesis of early Ediacaran shoshonitic mafic magmatism and high-K calc-alkaline granitoids in the Sergipano Orogenic System, Borborema Province, Brazil by Pereira, Fábio Santos, Lafon, Jean-Michel, Rosa, Maria de Lourdes da Silva, Conceição, Herbet, Bertotti, Anelise Losangela, Milhomem Neto, João Marinho, Lana, Cristiano, Koester, Edinei

“…•Emplacement of the Capela pluton at 630 Ma during the early Brasiliano Orogeny.•Shoshonitic mafic rocks were derived from a metasomatized lithospheric…”
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Distribution of trace metals and Pb isotopes in bottom sediments of the Murucupi River, North Brazil by Oliveira, Diomar Cavalcante, Lafon, Jean Michel, de Oliveira Lima, Marcelo

“…The Murucupi River belongs to the hydrographic network of the Para River estuary, at the southern portion of the Amazon River mouth, which consists of a…”
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Fluid inclusion and isotope (O, H, C, Sr) constraints on the orogenic gold mineralization at the Enche Concha and Tunel prospects, Gurupi Belt, Brazil by Melo Junior, Reinaldo, Klein, Evandro, Lafon, Jean-Michel, Harris, Chris

“…The gold mineralization at the Enche Concha and Tunel prospects, northwestern portion of the Gurupi Belt, is hosted in dacites and phyllites that belong to the…”
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Petrogenesis and U-Pb and Sm-Nd geochronology of the Taquaral granite: record of an orosirian continental magmatic arc in the region of Corumba - MS by Redes, Letícia Alexandre, Sousa, Maria Zélia Aguiar de, Ruiz, Amarildo Salina, Lafon, Jean-Michel

“…The Taquaral Granite is located on southern Amazon Craton in the region of Corumbá, westernmost part of the Brazilian state of Mato Grosso do Sul (MS), near…”
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Crustal growth and reworking of Archean crust within the Rhyacian domains of the southeastern Guiana Shield, Brazil: Evidence from zircon U–Pb–Hf and whole-rock Sm–Nd geochronology by Milhomem Neto, João Marinho, Lafon, Jean-Michel

“…The southeastern Guiana Shield, northern Amazonian Craton, is part of a Paleoproterozoic orogenic belt that was built up during the Transamazonian orogenic…”
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Petrogenesis, U-Pb and Sm-Nd geochronology of the Furna Azul Migmatite: partial melting evidence during the San Ignácio Orogeny, Paraguá Terrane, SW Amazon Craton by Nascimento, Newton Diego Couto do, Ruiz, Amarildo Salina, Pierosan, Ronaldo, Lima, Gabrielle Aparecida de, Matos, João Batista, Lafon, Jean-Michel, Moura, Candido Augusto Veloso

“…The Furna Azul Migmatite is a ~10 km2 complex located in Pontes e Lacerda city, Mato Grosso, Brazil. It belongs to Paraguá Terrane, limit with Rio Alegre…”
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Petrology and crustal evolution of the Tartarugal Grande Granulitic Complex - Northeastern Amazonian Craton by Gorayeb, Paulo Sergio de Sousa, Paiva, Hanna Paula Sales, Lafon, Jean-Michel, Rosa-Costa, Lúcia Travassos, Dantas, Elton Luiz

“…The Tartarugal Grande Complex (TGC) is an association of high-grade metamorphic rocks with Archean and Paleoproterozoic protoliths, located at the border of…”
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Pb Sr Nd isotopic tracing of the influence of the Amazon River on the bottom sediments in the lower Tapajós River by Medeiros Filho, Lucio C., Lafon, Jean-Michel, Souza Filho, Pedro Walfir M.

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Continental contribution to the marinoan cap carbonate of Tangará da Serra – MT, Brazil: further evidence from Sr-Nd-Pb isotope geochemistry by Souza, Nayra Michelly das Chagas, Lafon, Jean Michel, Milhomem Neto, João Marinho, Soares, Joelson Lima

“…Abstract On the southern edge of the Amazonian Craton, the Mirassol d’Oeste and Guia formations constitute the cap carbonate of the Araras Group. Petrography,…”
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The Algodões amphibolite–tonalite gneiss sequence, Borborema Province, NE Brazil: Geochemical and geochronological evidence for Palaeoproterozoic accretion of oceanic plateau/back-arc basalts and adakitic plutons by Martins, Guttenberg, Oliveira, Elson P., Lafon, Jean-Michel

“…Field relationships, geochemistry and U–Pb zircon and Sm–Nd whole-rock geochronology are used to constrain the genesis of Palaeoproterozoic massive…”
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Geochemistry, geochronology and Nd isotopes of the Gogó da Onça Granite: A new Paleoproterozoic A-type granite of Carajás Province, Brazil by Teixeira, Mayara Fraeda Barbosa, Dall’Agnol, Roberto, Santos, João Orestes Schneider, de Sousa, Luan Alexandre Martins, Lafon, Jean-Michel

“…The Gogó da Onça Granite (GOG) comprise a stock located in the Carajás Province in the southeastern part of Amazonian Craton near its border with the Araguaia…”
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Stable isotope systematics and fluid inclusion studies in the Cu–Au Visconde deposit, Carajás Mineral Province, Brazil: implications for fluid source generation by da Costa Silva, Antonia Railine, Villas, Raimundo Netuno Nobre, Lafon, Jean-Michel, Craveiro, Gustavo Souza, Ferreira, Valderez Pinto

“…The Cu–Au Visconde deposit is located in the Carajás Mineral Province (CMP), northern Brazil, near the contact between the ca. 2.76 Ga metavolcano-sedimentary…”
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Mafic subvolcanic intrusions from the southern Paraná‐Etendeka Large Igneous Province, Brazil: Insights from geochemistry and Sr–Nd–Pb isotopes by Sarmento, Carla Cecília Treib, Sommer, Carlos Augusto, Lima, Evandro Fernandes, Barreto, Carla Joana Santos, Rossetti, Lucas, Lafon, Jean Michel

“…The Early Cretaceous Paraná‐Etendeka Igneous Province is a predominantly tholeiitic sequence of continental flood basalts and silicic magmatism that is…”
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Sr isotope geochemistry and Pb-Pb geochronology of the Neoproterozoic cap carbonates, Tangará da Serra, Brazil by Romero, John Alexander Sandoval, Lafon, Jean Michel, Nogueira, Afonso Cesar Rodrigues, Soares, Joelson Lima

“…The Mirassol d'Oeste Formation (cap dolomites) and the base of the Guia Formation (cap limestones) represent the cap carbonates of the Neoproterozoic Araras…”
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Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil by Krymsky, Robert S, Macambira, Moacir J B, Lafon, Jean-Michel, Estumano, Gérson S

“…Analytical procedures for U-Pb isotope dilution analyses at the Pará-Iso isotope geology laboratory of the Federal University of Pará (UFPA) are described in…”
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Pb isotope geochemistry and reappraisal of Sr-Nd isotopes of the Cerro Morado basic magmatism (Ischigualasto-Villa Union Triassic basin, NW Argentina): Implications for the mantle sources by Sommer, Carlos Augusto, Barreto, Carla Joana S., Lafon, Jean Michel, Lima, Evandro Fernandes de, Alexandre, Felipe Marcelo, Chemale Jr, Farid, Koester, Edinei

“…Sr-Nd-Pb isotopic signatures were determined for silica-undersaturated hypabyssal alkaline basic rocks of the Los Baldecitos Formation in the Cerro Morado…”
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Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil by Sommer, Carlos Augusto, Leitzke, Felipe Padilha, Lima, Evandro Fernandes de, Barreto, Carla Joana Santos, Lafon, Jean Michel, Matté, Vinicius, Philipp, Ruy Paulo, Conceição, Rommulo Vieira, Basei, Miguel Ângelo Stipp

“…We present new U-Pb zircon ages and Sm-Nd-Pb isotopic data for volcanic and hypabyssal acid rocks from the northernmost exposure of the Acampamento Velho…”
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Electron microprobe U–Th–Pb monazite dating of the Transamazonian metamorphic overprint on Archean rocks from the Amapá Block, southeastern Guiana Shield, Northern Brazil by da Rosa-Costa, Lúcia T., Lafon, Jean-Michel, Cocherie, Alain, Delor, Claude

“…The Amapá Block, southeastern Guiana Shield, represents an Archean block involved in a large Paleoproterozoic belt, with evolution related to the…”
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Geology, geochemistry, and Pb–Pb zircon geochronology of the Paleoproterozoic magmatism of Vila Riozinho, Tapajós Gold Province, Amazonian craton, Brazil by Lamarão, Claudio N, Dall'Agnol, Roberto, Lafon, Jean-Michel, Lima, Evandro F

“…Pb–Pb zircon geochronologic data define two different periods of intense igneous activity in the Vila Riozinho region, Tapajós Gold Province (TGP),…”
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Distribution and isotopic composition of lead in bottom sediments from the hydrographic system of Belém, Pará (western margin of Guajará Bay and Carnapijó River) by Oliveira, Elma Costa, Lafon, Jean Michel, Corrêa, José Augusto Martins, Carvalho, Jully Hellen dos Santos

“…This study first aimed to evaluate the effect of human activities on the distribution of lead within the estuarine system of Belém, Pará. This was achieved by…”
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