C-, Sr-isotope and Hg chemostratigraphy of Neoproterozoic cap carbonates of the Sergipano Belt,Northeastern Brazil |
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| Authors: | Alcides Nobrega Sial Claudio Gaucher Marinho Alves da Silva Filho Valderez P Ferreira Marcio M Pimentel Luiz D Lacerda Emmanoel V Silva Filho Wilker Cezario |
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| Institution: | 1. NEG-LABISE, Department of Geology, UFPE, C.P. 7852, Recife, 50670-000, Brazil;2. Department Geología, Facultad de Ciencias, Iguá 4225, 11400 Montevideo, Uruguay;3. Companhia de Pesquisa de Recursos Minerais – CPRM, Recife, Brazil;4. Institute of Geosciences, University of Brasilia, Brasilia, 70910-900, Brasília-DF, Brazil;5. Labomar, Federal University of Ceará, Fortaleza, Ceará, Brazil;6. Department of Geochemistry, Federal Fluminense University, Niteroi, R.J., 24020-007, Brazil |
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| Abstract: | Two cap carbonates overlying glaciogenic diamictites crop out extensively in the eastern Vaza Barris Domain of the Sergipano Belt, northeastern Brazil. They are represented by carbonates of the Jacoca Formation, resting on top of diamictite of the Ribeiropolis Formation, and by the Olhos D’Agua Formation (carbonates, organic-rich towards the top), which overlies diamictite of the Palestina Formation. These two sequences were deformed and metamorphosed at sub-greenschist facies-conditions during the Brasiliano cycle (650–600 Ma). |
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| Keywords: | Neoproterozoic Cap carbonate Snowball Earth Chemostratigraphy Northeastern Brazil |
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