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The Carrancas Nappe System in the southern margin of the Brasilia Orogen: sedimentary provenance and tectonic setting.

Grant number: 11/13311-9
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): January 01, 2012
Effective date (End): October 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal researcher:Mario da Costa Campos Neto
Grantee:Alice Westin Teixeira
Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):13/19095-1 - Processing and interpretation of U-Pb and Lu-Hf data of zircon crystals from metasedimentary and metaigneous rocks, advised by Prof. Dr. Chris Hawkesworth at the university of st. Andrews, Scotland, BE.EP.DR


The southern margin of the Brasília Orogen is characterized by an ediacaran nappe system formed during the collision between the São Francisco and Paranapanema paleocontinentes. In this nappe system the superior alocthons were laterally transported to the southern margin of the São Francisco Craton (Socorro-Guaxupé Nappe and Andrelandia Nappe System), while the inferior alocthons were transported directly against the craton (Lima Duarte Nappe and Carrancas Nappe System). Metassedimentary and metamafic units of the Carrancas Nappe System and the Biotita Schist Unit from the Andrelandia Nappe System front are the study objects of this project.Isotopic and geochemical signatures and the geochronological study will be the main tools in the sedimentary provenance and the tectonic setting during the sedimentation approaches. The objectives will be accomplished by isotopic and elemental geochemistry in total rock analyses, by trace element geochemistry in situ in detrital zircon and detrital plagioclase, and by U-Pb system analyses and the concentration of Hf isotopes in zircon. The analyses will be realized by X-ray fluorescence, by ICP MS and LA-MC-ICP MS.

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Scientific publications
(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)
WESTIN, ALICE; CAMPOS NETO, MARIO C.; CAWOOD, PETER A.; HAWKESWORTH, CHRIS J.; DHUIME, BRUNO; DELAVAULT, HELENE. The Neoproterozoic southern passive margin of the Sao Francisco craton: Insights on the pre-amalgamation of West Gondwana from U-Pb and Hf-Nd isotopes. Precambrian Research, v. 320, p. 454-471, . (13/19095-1, 11/13311-9, 16/06952-1, 13/13530-8)
WESTIN, ALICE; CAMPOS NETO, MARIO C.; HAWKESWORTH, CHRIS J.; CAWOOD, PETER A.; DHUIME, BRUNO; DELAVAULT, HELENE. A paleoproterozoic intra-arc basin associated with a juvenile source in the Southern Brasilia Orogen: Application of U-Pb and Hf-Nd isotopic. Precambrian Research, v. 276, p. 178-193, . (13/19095-1, 11/13311-9, 13/13530-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
TEIXEIRA, Alice Westin. Depósitos orogênicos e bacia extensional: o embasamento metassedimentar e a cobertura da margem passiva no orógeno Brasília meridional. 2015. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.

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