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Valdecir de Assis Janasi

CV Lattes ORCID


Universidade de São Paulo (USP). Instituto de Geociências (IGC)  (Institutional affiliation for the last research proposal)
Birthplace: Brazil

Graduated in Geology at the Instituto de Geociências, Universidade de São Paulo (1983), Master Degree (1986) and Ph.D. (1992) in Mineralogy and Petrology at Instituto de Geociências Universidade de São Paulo. Full Professor at the Instituto de Geociências, Universidade de São Paulo, in the field of Igneous Petrology. His interests are on several subjects related to the origin and evolution of magmas and consequences for the evolutoin of the Earth´s crust and mantle, mostly: granitic magmatism, acid-basic volcanism in the Paraná-Etendeka Province, rock and mineral geochemistry; analytical geochemistry, geological mapping and regional geology. Coordinator of the Geonalitica Core Facility since May, 2017. (Source: Lattes Curriculum)

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Scientific publications resulting from Research Grants and Scholarships under the grantee's responsibility (34)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

TOLEDO, BARBARA BUENO; JANASI, VALDECIR DE ASSIS. Petrogenesis of Granites from the Ediacaran Socorro Batholith, SE Brazil: Constraints from Zircon Dating, Geochemistry and Sr-Nd-Hf Isotopes. JOURNAL OF EARTH SCIENCE, v. 32, n. 6, SI, p. 1397-1414, . (15/01817-6, 19/17550-0)

CARVALHO, B. B.; SAWYER, E. W.; JANASI, V. A.. Enhancing Maficity of Granitic Magma during Anatexis: Entrainment of Infertile Mafic Lithologies. JOURNAL OF PETROLOGY, v. 58, n. 7, p. 1333-1362, . (15/01817-6)

GIORDANO, D.; VONA, A.; GONZALEZ-GARCIA, D.; ALLABAR, A.; KOLZENBURG, S.; POLO, L. A.; JANASI, V. DE ASSIS; BEHRENS, H.; DE CAMPOS, C. P.; DE CRISTOFARO, S.; et al. Viscosity of Palmas-type magmas of the Parana Magmatic Province (Rio Grande do Sul State, Brazil): Implications for high-temperature silicic volcanism. CHEMICAL GEOLOGY, v. 560, . (12/06082-6, 17/15540-1)

DE CAMPOS, CRISTINA P.; DE MEDEIROS, SILVIA R.; MENDES, JULIO C.; PEDROSA-SOARES, ANTONIO C.; DUSSIN, IVO; LUDKA, ISABEL P.; DANTAS, ELTON L.. Cambro-Ordovician magmatism in the Aracuai Belt (SE Brazil): Snapshots from a post-collisional event. Journal of South American Earth Sciences, v. 68, n. SI, p. 248-268, . (14/22980-0)

PERUGINI, D.; DE CAMPOS, C. P.; PETRELLI, M.; MORGAVI, D.; VETERE, F. P.; DINGWELL, D. B.. Quantifying magma mixing with the Shannon entropy: Application to simulations and experiments. LITHOS, v. 236, p. 299-310, . (15/11850-0, 09/50493-8)

HENRIQUE-PINTO, RENATO; JANASI, VALDECIR DE ASSIS; CARVALHO, BRUNA BORGES; CALADO, BRUNO DE OLIVEIRA; GROHMANN, CARLOS HENRIQUE. Integrated geological map of the Sao Roque Domain, North of Sao Paulo City - Brazil. Journal of Maps, v. 10, n. 3, p. 434-439, . (12/04148-0)

FLORISBAL, L. M.; JANASI, V. A.; BITENCOURT, M. F.; NARDI, L. V. S.; MARTELETO, N. S.. Geological, geochemical and isotope diversity of similar to 134 Ma dykes from the Florianopolis Dyke Swarm, Parana Magmatic Province: Geodynamic controls on petrogenesis. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, v. 355, n. SI, p. 181-203, . (11/09673-2, 12/06082-6)

CIOFFI, CAUE RODRIGUES; CAMPOS NETO, MARIO DA COSTA; MOLLER, ANDREAS; ROCHA, BRENDA CHUNG. Titanite petrochronology of the southern Brasilia Orogen basement: Effects of retrograde net-transfer reactions on titanite trace element compositions. LITHOS, v. 344, p. 393-408, . (13/13530-8, 14/05881-8, 16/25987-0, 16/23266-4, 12/24933-3)

FLORISBAL, LUANA MOREIRA; BITENCOURT, MARIA DE FATIMA; JANASI, VALDECIR DE ASSIS; STOLL NARDI, LAURO VALENTIM; HEAMAN, LARRY M.. Petrogenesis of syntectonic granites emplaced at the transition from thrusting to transcurrent tectonics in post-collisional setting: Whole-rock and Sr-Nd-Pb isotope geochemistry in the Neoproterozoic Quatro Ilhas and Mariscal Granites, Southern Brazil. LITHOS, v. 153, n. SI, p. 53-71, . (07/00635-5, 07/02387-9)

FLORISBAL, LUANA MOREIRA; JANASI, VALDECIR DE ASSIS; BITENCOURT, MARIA DE FATIMA; STOLL NARDI, LAURO VALENTIM; HEAMAN, LARRY M.. Contrasted crustal sources as defined by whole-rock and Sr-Nd-Pb isotope geochemistry of neoproterozoic early post-collisional granitic magmatism within the Southern Brazilian Shear Belt, Camboriu, Brazil. Journal of South American Earth Sciences, v. 39, p. 24-43, . (07/00635-5, 07/02387-9)

HENRIQUE-PINTO, R.; JANASI, V. A.; VASCONCELLOS, A. C. B. C.; SAWYER, E. W.; BARNES, S. -J.; BASEI, M. A. S.; TASSINARI, C. C. G.. Zircon provenance in meta-sandstones of the Sao Roque Domain: Implications for the Proterozoic evolution of the Ribeira Belt, SE Brazil. Precambrian Research, v. 256, p. 271-288, . (12/04148-0)

FLORISBAL, LUANA MOREIRA; HEAMAN, LARRY M.; JANASI, VALDECIR DE ASSIS; BITENCOURT, MARIA DE FATIMA. Tectonic significance of the Florianopolis Dyke Swarm, Parana-Etendeka Magmatic Province: A reappraisal based on precise U-Pb dating. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, v. 289, p. 140-150, . (11/09673-2, 12/06082-6, 12/13180-4)

CARVALHO, B. B.; JANASI, V. A.; SAWYER, E. W.. Evidence for Paleoproterozoic anatexis and crustal reworking of Archean crust in the Sao Francisco Craton, Brazil: A dating and isotopic study of the Kinawa migmatite. Precambrian Research, v. 291, p. 98-118, . (15/01817-6)

MARTINS‚ L.; VLACH‚ S.R.F.; JANASI‚ V.A.. Reaction microtextures of monazite: correlation between chemical and age domains in the Nazaré Paulista migmatite‚ SE Brazil. CHEMICAL GEOLOGY, v. 261, n. 3, p. 271-285, .

ALVES, ADRIANA; JANASI, VALDECIR DE ASSIS; CAMPOS NETO, MARIO DA COSTA; HEAMAN, LARRY; SIMONETTI, ANTONIO. U-Pb geochronology of the granite magmatism in the Embu Terrane: Implications for the evolution of the Central Ribeira Belt, SE Brazil. Precambrian Research, v. 230, p. 1-12, .

ROCHA, BRENDA C.; DAVIES, JOSHUA H. F. L.; JANASI, VALDECIR A.; SCHALTEGGER, URS; NARDY, ANTONIO J. R.; GREBER, NICOLAS D.; LUCCHETTI, ANA CAROLINA F.; POLO, LIZA A.. Rapid eruption of silicic magmas from the Parana magmatic province (Brazil) did not trigger the Valanginian event. GEOLOGY, v. 48, n. 12, p. 1174-1178, . (12/06082-6, 16/23266-4, 19/24872-3, 17/18220-8)

ROSSETTI, LUCAS M. M.; HOLE, MALCOLM J.; DE LIMA, EVANDRO F.; SIMOES, MATHEUS S.; MILLETT, JOHN M.; ROSSETTI, MARCOS M. M.. Magmatic evolution of Low-Ti lavas in the southern Paran ` a-Etendeka Large Igneous Province. LITHOS, v. 400-401, . (19/22084-8)

MANSUR, EDUARDO; BARNES, SARAH-JANE; JANASI, VALDECIR; HENRIQUE-PINTO, RENATO; ALVES, ADRIANA; MARTELETO, NATASHA SARDE. The distribution of platinum-group elements and Te, As, Bi, Sb and Se (TABS plus ) in the Parana Magmatic Province: Effects of crystal fractionation, sulfide segregation and magma degassing. LITHOS, v. 400, . (19/22084-8, 12/06082-6)

GUIMARAES, L. F.; RAPOSO, M. I. B.; JANASI, V. A.; CANON-TAPIA, E.; POLO, L. A.. An AMS study of different silicic units from the southern Parana-Etendeka Magmatic Province in Brazil: Implications for the identification of flow directions and local sources. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, v. 355, n. SI, p. 304-318, . (12/01973-0, 12/06082-6)

ARAUJO, FERNANDO PRADO; MARTINS, LUCELENE; PEREIRA, GIOVANNA DE SOUZA; JANASI, VALDECIR DE ASSIS. Inhandjara topaz leucogranite: A late rare metal-mineralized stock within the A-type Itu batholith, SE Brazil. Journal of South American Earth Sciences, v. 101, . (15/01817-6)

GUIMARAES, L. F.; DE CAMPOS, C. P.; JANASI, V. A.; LIMA, E. F.; DINGWELL, D. B.. Flow and fragmentation patterns in the silicic feeder system and related deposits in the Parana-Etendeka Magmatic Province, Sao Marcos, South Brazil. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, v. 358, p. 149-164, . (14/22980-0, 12/06082-6)

ALVES, ADRIANA; PEREIRA, GIOVANNA DE SOUZA; JANASI, VALDECIR DE ASSIS; HIGGINS, MICHAEL; POLO, LIZA ANGELICA; JURIAANS, ORLANDO STANLEY; RIBEIRO, BRUNO VIEIRA. The origin of felsic microgranitoid enclaves: Insights from plagioclase crystal size distributions and thermodynamic models. LITHOS, v. 239, p. 33-44, . (11/07074-4, 07/08683-9)

CARVALHO, BRUNA BORGES; JANASI, VALDECIR DE ASSIS; HENRIQUE-PINTO, RENATO. Geochemical and Sr-Nd-Pb isotope constraints on the petrogenesis of the K-rich Pedra Branca Syenite: Implications for the Neoproterozoic post-collisional magmatism in SE Brazil. LITHOS, v. 205, p. 39-59, . (07/00635-5)

ALVES, ADRIANA; JANASI, VALDECIR DE ASSIS; CAMPOS NETO, MARIO DA COSTA. Sources of granite magmatism in the Embu Terrane (Ribeira Belt, Brazil): Neoproterozoic crust recycling constrained by elemental and isotope (Sr-Nd-Pb) geochemistry. Journal of South American Earth Sciences, v. 68, n. SI, p. 205-223, . (07/00635-5)

JANASI, VALDECIR DE ASSIS; ANDRADE, SANDRA; VASCONCELLOS, ANTONIO CARLOS B. C.; HENRIQUE-PINTO, RENATO; ULBRICH, HORSTPETER H. G. J.. Timing and sources of granite magmatism in the Ribeira Belt, SE Brazil: Insights from zircon in situ U-Pb dating and Hf isotope geochemistry in granites from the Sao Roque Domain. Journal of South American Earth Sciences, v. 68, n. SI, p. 224-247, . (12/04148-0)

ALMEIDA, VIDYA V.; JANASI, VALDECIR DE A.; SVISERO, DARCY P.; NANNINI, FELIX. Mathiasite-loveringite and priderite in mantle xenoliths from the Alto Paranaiba Igneous Province, Brazil: genesis and constraints on mantle metasomatism. CENTRAL EUROPEAN JOURNAL OF GEOSCIENCES, v. 6, n. 4, p. 614-632, . (06/01925-4, 07/00635-5)

CARVALHO, B. B.; SAWYER, E. W.; JANASI, V. A.. Crustal reworking in a shear zone: transformation of metagranite to migmatite. JOURNAL OF METAMORPHIC GEOLOGY, v. 34, n. 3, p. 237-264, . (15/01817-6)

FLORISBAL, LUANA MOREIRA; JANASI, VALDECIR DE ASSIS; BITENCOURT, MARIA DE FATIMA; HEAMAN, LARRY M.. Space-time relation of post-collisional granitic magmatism in Santa Catarina, southern Brazil: U-Pb LA-MC-ICP-MS zircon geochronology of coeval mafic-felsic magmatism related to the Major Gercino Shear Zone. Precambrian Research, v. 216, p. 132-151, . (07/00635-5, 07/02387-9)

CARVALHO, BRUNA BORGES; JANASI, VALDECIR DE ASSIS. Crystallization conditions and controls on trace element residence in the main minerals from the Pedra Branca Syenite, Brazil: An electron microprobe and LA-ICPMS study. LITHOS, v. 153, n. SI, p. 208-223, . (07/00635-5)

PERUGINI, DIEGO; DE CAMPOS, CRISTINA P.; PETRELLI, MAURIZIO; DINGWELL, DONALD B.. Concentration variance decay during magma mixing: a volcanic chronometer. SCIENTIFIC REPORTS, v. 5, . (15/11850-0, 09/50493-8)

HENRIQUE-PINTO, R.; JANASI, V. A.; TASSINARI, C. C. G.; CARVALHO, B. B.; CIOFFI, C. R.; STRIKIS, N. M.. Provenance and sedimentary environments of the Proterozoic Sao Roque Group, SE-Brazil: Contributions from petrography, geochemistry and Sm-Nd isotopic systematics of metasedimentary rocks. Journal of South American Earth Sciences, v. 63, p. 191-207, . (12/04148-0)

ALVES, ADRIANA; JANASI, VALDECIR DE ASSIS; SIMONETTI, ANTONIO; HEAMAN, LARRY. Microgranitic Enclaves as Products of Self-mixing Events: a Study of Open-system Processes in the Maua Granite, Sao Paulo, Brazil, Based on in situ Isotopic and Trace Elements in Plagioclase. JOURNAL OF PETROLOGY, v. 50, n. 12, p. 2221-2247, . (07/00635-5)

ALVES, ADRIANA; JANASI, VALDECIR DE ASSIS; PEREIRA, GIOVANNA DE SOUZA; PRADO, FERNANDO ARAUJO; MUNOZ, PATRICIO R. M.. Unravelling the hidden evidences of magma mixing processes via combination of in situ Sr isotopes and trace elements analyses on plagioclase crystals. LITHOS, v. 404-405, . (11/07074-4, 07/08683-9, 19/17550-0)

GOMES, CELSO DE BARROS; AZZONE, ROGERIO GUITARRARI; ROJAS, GASTON EDUARDO ENRICH; GUARINO, VINCENZA; RUBERTI, EXCELSO. Agpaitic Alkaline Rocks in Southern Brazilian Platform: A Review. MINERALS, v. 11, n. 9, . (19/13174-3, 19/22084-8)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MARTINS, Lucelene. Geração e migração de magmas graníticos na crosta continental: estudos de detalhe em granitos e migmatitos da região de Nazaré Paulista (SP). Tese (Doutorado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (01/01101-8

GUIMARÃES, Letícia Freitas. Caracteristicas físicas e químicas e modelo eruptivo para os riolitos tipo Santa Maria (Província Magmática Paraná) na região de Gramado Xavier, RS. Dissertação (Mestrado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (12/01973-0

FLORISBAL, Luana Moreira. Petrogênese de granitos sintectônicos em ambiente pós-colisional do escudo catarinense: estudo integrado de geologia estrutural, geoquímica elemental e isotópica SR-ND-PB e geocronologia U-PB em zircão. Tese (Doutorado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (07/02387-9

PEREIRA, Giovanna de Souza. O significado dos enclaves microgranulares félsicos na evolução de magmas graníticos: Petrologia dos enclaves do Plúton Salto, Batólito Itu, SP. Dissertação (Mestrado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (10/03300-7

ALVES, Adriana. Petrogênese de plútons graníticos do leste paulista: geocronologia, geoquímica elemental e isotópica. Tese (Doutorado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (04/09942-0

FREITAS, Vivian Azor de. A geração de magmas ácidos na Província Magmática Paraná, região de Piraju-Ourinhos (SP): uma contribuição da geoquímica isotópica e de elementos traço em rochas e minerais. Dissertação (Mestrado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (06/05917-6

ALMEIDA, Vidya Vieira de. Mineralogia e petrologia de xenólitos mantélicos das regiões de Ubatuba (SP) e Monte Carmelo (MG): evidências de fusão parcial e metassomatismo no manto superior do sudeste do Brasil. Dissertação (Mestrado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (06/01925-4

MARTINS, Lucelene. Condições de cristalização de granitos sin- e tardi-orogênicos da porção central do batólito Agudos Grandes, SP, com base em geoquímica de minerais e rochas. Dissertação (Mestrado) -  Instituto de Geociências.  Universidade de São Paulo (USP).  São Paulo.  (98/15804-6

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