Geological and geochemical investigations on archaen granite-gneiss terranes of São Francisco Craton

• Grant number: 14/04920-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: June 01, 2014
• End date: May 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Elson Paiva de Oliveira
• Grantee: Juan Antonio Moreno Moreno
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 12/15824-6 - Evolution of archaean terranes of the São Francisco Craton and the Borborema Province, Brazil: global environmental and geodynamic implications, AP.TEM

Abstract

The project deals with the study of CH1, CH2 and CH6 charnockites from the Jequié complex and partially migmatized gneisses and pink granitoids from the Campo Belo complex. These gneisses and granitoids will be studied using XRF, ICP-MS, LA-ICP-MS and SHRIMP, with the main objective of gaining new insights into the understanding of crustal growth and crustal recycling during the Archean in the São Francisco Craton and to determine the sources of granitoids and gneisses with emphases in detecting supracrustal components. Textural analysis along with U-Pb dating using SHRIMP and LA-ICP-MS will allow to establish the crystallization age and to detect inherited ages from older events. Furthermore, the possible existence of inherited zircons in Archean juvenile terrains could provide significant improvements in the understanding of continental growth and the onset of plate tectonics.Oxygen and Hf isotopes in zircon along with whole-rock Nd isotope will permit to unravel the nature of magma sources of Archean gneisses and granitoids and to evaluate when the hydrologic cycle arose on the Earth surface.

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)

VERMA, SANJEET K.; VERMA, SURENDRA P.; OLIVEIRA, ELSON P.; SINGH, VINOD K.; MORENO, JUAN A.. LA-SF-ICP-MS zircon U-Pb geochronology of granitic rocks from the central Bundelkhand greenstone complex, Bundelkhand craton, India. JOURNAL OF ASIAN EARTH SCIENCES, v. 118, p. 125-137, MAR 15 2016. (12/15824-6, 14/04920-0, 12/07243-3)

MOLINA, J. F.; MORENO, J. A.; CASTRO, A.; RODRIGUEZ, C.; FERSHTATER, G. B.. Calcic amphibole thermobarometry in metamorphic and igneous rocks: New calibrations based on plagioclase/amphibole Al-Si partitioning and amphibole/liquid Mg partitioning. LITHOS, v. 232, p. 286-305, SEP 1 2015. (14/04920-0)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.; SILVA, PAOLA M.; MORENO, JUAN A.; AMARAL, WAGNER S.. Geochemistry of komatiites and basalts from the Rio das Velhas and Pitangui greenstone belts, Sao Francisco Craton, Brazil: Implications for the origin, evolution, and tectonic setting. LITHOS, v. 284, p. 560-577, JUL 2017. (12/15824-6, 14/04920-0, 12/07243-3)

SEMPRICH, JULIA; MORENO, JUAN ANTONIO; OLIVEIRA, ELSON PAIVA. Phase equilibria and trace element modeling of Archean sanukitoid melts. Precambrian Research, v. 269, p. 122-138, OCT 2015. (14/03334-0, 12/15824-6, 14/04920-0)

MORENO, J. A.; MOLINA, J. F.; BEA, F.; ABU ANBAR, M.; MONTERO, P.. Th-REE- and Nb-Ta-accessory minerals in post-collisional Ediacaran felsic rocks from the Katerina Ring Complex (S. Sinai, Egypt): An assessment for the fractionation of Y/Nb, Th/Nb, La/Nb and Ce/Pb in highly evolved A-type granites. LITHOS, v. 258, p. 173-196, AUG 2016. (14/04920-0)

MORENO, J. A.; BALDIM, M. R.; SEMPRICH, J.; OLIVEIRA, E. P.; VERMA, S. K.; TEIXEIRA, W.. Geochronological and geochemical evidences for extension-related Neoarchean granitoids in the southern Sao Francisco Craton, Brazil. Precambrian Research, v. 294, p. 322-343, JUN 2017. (14/03334-0, 12/15824-6, 14/04920-0, 12/07243-3)