Geochemistry and modelling of basic intrusions in the Cana Brava and Niquelândia Mafic-Ultramafic Complexes.

• Grant number: 13/19519-6
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: February 01, 2014
• End date: January 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Vicente Antonio Vitorio Girardi
• Grantee: Tommaso Giovanardi
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

One of the most debated issues in Earth sciences concerns the processes of intrusion and crystallization of magmas at different crustal depths. Large mafic-ultramafic complexes provide a unique opportunity to characterize the evolution of melts during their emplacement and cooling and to understand the processes of melt-country rock interaction. The proposed project wants to provide new petrological and geochemical constraints on the evolution of mafic-ultramafic complexes thanks to an historical international partnership between Italian and Brazilian universities. We propose to study in detail two mafic-ultramafic complexes cropping out in the Brasilia Belt: the Niquelândia and Cana Brava complexes (central Goiás, Brazil). Field work and samples collection will be performed during the two years of the project, with particular interest on septa and lenses of exotic rocks within the complexes. Petrographic and geochemical analysis will be carried out to determinate the conditions of intrusion (temperature and pressure) and to evaluate the degree of crustal contamination in the parental melts. The study of exotic metamorphic rocks will lead to the reconstruction of their thermal history and their interaction with the intruded melts. Rb/Sr, Sm/Nd and U-Pb isotopic analyses will be performed to provide further constraints on crustal contamination processes and to determine the age of the Cana Brava complex and its relationship with the age of the Niquelândia intrusion.

Scientific publications

(6)

(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)

GIOVANARDI, TOMMASO; GIRARDI, VICENTE A. V.; CORREIA, CIRO T.; TASSINARI, COLOMBO C. G.; SATO, KEI; CIPRIANI, ANNA; MAZZUCCHELLI, MAURIZIO. New U-Pb SHRIMP-II zircon intrusion ages of the Cana Brava and Barro Alto layered complexes, central Brazil: constraints on the genesis and evolution of the Tonian Goias Stratiform Complex. LITHOS, v. 282, p. 339-357, JUN 2017. (13/19519-6)

GIOVANARDI, T.; LUGLI, F.. The Hf-INATOR: A free data reduction spreadsheet for Lu/Hf isotope analysis. EARTH SCIENCE INFORMATICS, v. 10, n. 4, p. 517-523, DEC 2017. (13/19519-6)

GIOVANARDI, TOMMASO; GIRARDI, VICENTE A. V.; CORREIA, CIRO T.; SINIGOI, SILVANO; TASSINARI, COLOMBO C. G.; MAZZUCCHELLI, MAURIZIO. The growth and contamination mechanism of the Cana Brava layered mafic-ultramafic complex: new field and geochemical evidences. MINERALOGY AND PETROLOGY, v. 111, n. 2, p. 291-314, APR 2017. (13/19519-6)

ZANETTI, ALBERTO; GIOVANARDI, TOMMASO; LANGONE, ANTONIO; TIEPOLO, MASSIMO; WU, FU-YUAN; DALLAI, LUIGI; MAZZUCCHELLI, MAURIZIO. Origin and age of zircon-bearing chromitite layers from the Finero phlogopite peridotite (Ivrea-Verbano Zone, Western Alps) and geodynamic consequences. LITHOS, v. 262, p. 58-74, OCT 1 2016. (13/19519-6)

GIOVANARDI, TOMMASO; MAZZUCCHELLI, MAURIZIO; ZANETTI, ALBERTO; LANGONE, ANTONIO; TIEPOLO, MASSIMO; CIPRIANI, ANNA. Occurrence of phlogopite in the Finero Mafic layered complex. CENTRAL EUROPEAN JOURNAL OF GEOSCIENCES, v. 6, n. 4, p. 588-613, DEC 2014. (13/19519-6)

GIOVANARDI, TOMMASO; MAZZUCCHELLI, MAURIZIO; LUGLI, FEDERICO; GIRARDI, VICENTE A. V.; CORREIA, CIRO T.; TASSINARI, COLOMBO C. G.; CIPRIANI, ANNA. Isotopic constraints on contamination processes in the Tonian Goias Stratiform Complex. LITHOS, v. 310, p. 136-152, JUN 2018. (13/19519-6)