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Sulfur and Carbon biogeochemical cycles in the Ediacaran and their record in Brazilian sedimentary successions

Grant number: 16/11496-5
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2016
Effective date (End): October 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal Investigator:Marly Babinski
Grantee:Sergio Caetano Filho
Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):18/19302-0 - Paired sulfur and carbon isotope analysis of Brazilian Ediacaran carbonate rocks and inferences on the West Gondwana marine biogeochemical cycles, BE.EP.DR


The most remarkable changes in the Earth's life evolution took place during the Ediacaran Period, when the first macroscopic complex organisms emerged. Geochemical proxies show major fluctuations coupled to the paleontological record appearances, which point to the evolution of the whole ocean-atmosphere-biosphere system. The main event considered as the trigger for this turning point is the final oxygenation of the oceans and atmosphere. Regarding the sulphur, great ´34S excursions in the marine sulphate through Neoproterozoic record would be resulted of a smaller reservoir when compared to the modern values, reaching these levels only at the Ediacaran Period. These excursions are coupled to the ´13C record, as the rise of atmospheric oxygen and marine sulphate levels led to changes in the organic carbon cycle. Despite these recognized anomalies, there is no agreement concerning the biogeochemical processes involved, besides the need for data from West Gondwana to the global record. The main goal of this project is to access Brazilian Ediacaran sections (South Paraguay Belt and São Francisco Basin) to provide C (carbonate and organic matter) and S (sulphate and sulphide) isotope chemostratigraphic data supported by detailed microfaciological study. The results will improve the stratigraphic resolution of Ediacaran record in the Brazilian deposits, as well as to contribute to the understanding of the C and S isotopic global record. Additionally, more detailed paleoenvironmental inferences concerning the events in this period will be possible. Therefore, it will improve the comprehension of biogeochemical cycles at the end of Neoproterozoic Era and the key events that led to the rise of complex organisms in the Earth.

Matéria(s) publicada(s) na Revista Pesquisa FAPESP sobre a bolsa::
Gas from an ancient sea 
El gas del antiguo mar del sertón 
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Scientific publications (4)
(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)
GUACANEME, CRISTIAN; BABINSKI, MARLY; BEDOYA-RUEDA, CAROLINA; PAULA-SANTOS, GUSTAVO M.; CAETANO-FILHO, SERGIO; KUCHENBECKER, MATHEUS; REIS, HUMBERTO L. S.; TRINDADE, RICARDO I. F.. Tectonically-induced strontium isotope changes in ancient restricted seas: The case of the Ediacaran-Cambrian Bambui foreland basin system, east Brazil. GONDWANA RESEARCH, v. 93, p. 275-290, . (16/11496-5, 17/00399-1, 16/06114-6)
CAETANO-FILHO, SERGIO; PAULA-SANTOS, GUSTAVO M.; GUACANEME, CRISTIAN; BABINSKI, MARLY; BEDOYA-RUEDA, CAROLINA; PELOSO, MARILIA; AMORIM, KAMILLA; AFONSO, JHON; KUCHENBECKER, MATHEUS; REIS, HUMBERTO L. S.; et al. Sequence stratigraphy and chemostratigraphy of an Ediacaran-Cambrian foreland-related carbonate ramp (Bambui Group, Brazil). Precambrian Research, v. 331, . (16/11496-5, 16/06114-6, 17/00399-1)
CAETANO-FILHO, SERGIO; SANSJOFRE, PIERRE; ADER, MAGALI; PAULA-SANTOS, GUSTAVO M.; GUACANEME, CRISTIAN; BABINSKI, MARLY; BEDOYA-RUEDA, CAROLINA; KUCHENBECKER, MATHEUS; REIS, HUMBERTO L. S.; TRINDADE, RICARDO I. F.. A large epeiric methanogenic Bambui sea in the core of Gondwana supercontinent?. GEOSCIENCE FRONTIERS, v. 12, n. 1, p. 203-218, . (16/11496-5, 16/06114-6, 17/00399-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
CAETANO FILHO, Sergio. Carbon and sulfur biogeochemical cycles in the Brazilian Ediacaran record. 2020. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.

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