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Metamorphism and partial melting in ancient orogens

Grant number: 13/04007-0
Support Opportunities:Regular Research Grants
Duration: September 01, 2013 - February 29, 2016
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal Investigator:Renato de Moraes
Grantee:Renato de Moraes
Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated researchers: Beatriz Pontes Araújo ; Edward William Sawyer ; Frederico Meira Faleiros ; Gergely Andres Julio Szabó ; Lucelene Martins

Abstract

This research project aims to investigate the the tectonic evolution of ancient orogens through the study of metamorphic rocks. Metamorphism and partial melting are direct consequences of the thermal relaxation that follows the collisional stage in orogens. The shape of the P-T paths, melting reactions and mineral paragenesis are reflexes of the tectonic history the rock underwent, so the characterization of textures, type of metamorphism and melting, determination and calculation of intensive variables can be used as tools to access and infer part of the tectonic story of orogen. Two model regions are chosen to research, the Southern Brasília Orogen and Itatins Complex. In both units will be investigated metamorphic rocks of green schist to granulite facies, for determination of P-T conditions, metamorphic paths, melting process, textures, mineral growth, behavior of trace elements in minerals in various textural contexts, in situ dating, and thermodynamic modeling. (AU)

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Scientific publications (12)
(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)
DA MOTTA, RAFAEL GONCALVES; MORAES, RENATO. Pseudo- and real-inverted metamorphism caused by the superposition and extrusion of a stack of nappes: a case study of the Southern Brasilia Orogen, Brazil. INTERNATIONAL JOURNAL OF EARTH SCIENCES, v. 106, n. 7, p. 2407-2427, . (13/04007-0)
FALEIROS, F. M.; MORAES, R.; PAVAN, M.; CAMPANHA, G. A. C.. A new empirical calibration of the quartz c-axis fabric opening-angle deformation thermometer. TECTONOPHYSICS, v. 671, p. 173-182, . (13/04007-0, 15/04487-7)
SANTOS, CAIO A.; WHITE, RICHARD W.; MORAES, RENATO; SZABO, GERGELY A. J.. The gabbro to amphibolite transition along a hydration front. JOURNAL OF METAMORPHIC GEOLOGY, v. 39, n. 4, . (13/04007-0, 16/22627-3)
SANTOS, CAIO A.; LUVIZOTTO, GEORGE L.; MORAES, RENATO; FUMES, REGIANE A.; ZACK, THOMAS. Metamorphism of retroeclogites from the Passos Nappe, Southern Brasilia Orogen. Journal of South American Earth Sciences, v. 112, n. 2, . (16/22627-3, 15/05230-0, 13/04007-0)
MOTTA, RAFAEL G.; FITZSIMONS, IAN C. W.; MORAES, RENATO; JOHNSON, TIM E.; SCHUINDT, SHEILA; BENETTI, BEATRIZ Y.. Recovering P-T-t paths from ultra-high temperature (UHT) felsic orthogneiss: An example from the Southern Brasilia Orogen, Brazil. Precambrian Research, v. 359, . (16/22627-3, 13/04007-0, 15/22355-0, 16/10276-1)
SANTOS, CAIO ARTHUR; MORAES, RENATO; SZABO, GERGELY A. J.. A comparison between phase diagram modelling of metamafic rocks and experimental and independent thermobarometric data. LITHOS, v. 340, p. 108-123, . (16/22627-3, 13/04007-0)
PAVAN, M.; SAWYER, E. W.; MORAES, R.; FALEIROS, F. M.. Partial melting of granodiorite: insights from ediacaran granulite-facies metamorphism in Southern Brazil. JOURNAL OF PETROLOGY, v. 62, n. 7, p. 29-pg., . (13/04007-0)
JULIAO, EDUARDO LOPES; MORAES, RENATO; FALEIROS, FREDERICO MEIRA; DA MOTTA, RAFAEL GONCALVES; QUIROZ VALLE, FRANCY ROXANA; LEAO LOPES, LEONARDO BRENGUERE. The role of deformation-assisted by water influx on partial melting of a granite protolith, and its role in the evolution of southwestern Sao Francisco Craton margin, Brazil. Journal of South American Earth Sciences, v. 112, n. 1, . (18/10012-0, 16/22627-3, 13/04007-0)

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