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Sedimentary evolution of the Sete Lagoas formation (Bambuí group, northern Minas Gerais State) in the context of the upper Ediacaran sedimentary basins

Grant number: 15/07391-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2015
Effective date (End): July 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Lucas Verissimo Warren
Grantee:Juliana Okubo
Home Institution: Instituto de Geociências e Ciências Exatas (IGCE). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Associated scholarship(s):17/19023-1 - Bulk sulfur isotopic data and proxy minerals from the Sete Lagoas Formation (Bambuí Group), BE.EP.DR

Abstract

The transition between the Proterozoic and Fanerozoic eons is characterized by at least three major glacial events (Sturtian, Marinoan and Gaskiers), succeeded by a world wide carbonate sedimentation. The Bambuí Group (especially the Sete Lagoas Formation) has been the object of several sedimentological, geochronological and isotopical studies in the last decades, being associated with Sturtian or Marinoan glaciation. The occurrence of the guide fossil Cloudina sp. confirms a late Ediacaran age for the Sete Lagoas Formation and indicates that this unit is certainly younger than the glaciation Gaskiers. In the study area, located in Januária-MG region, there are virtually no studies focused on stratigraphic and sedimentological analysis for this unit. This lack of detailed studies preclude the full correlation of the Sete Lagoas Formation with coeval units in Brazil and South America as the exposures of the unit located in the southern portion of São Francisco craton. This project aims to conduct sedimentological and stratigraphic detailed studies in the Ediacaran successions of the Sete Lagoas Formation (Bambuí Group) in the region of Januária, north of Minas Gerais. In the proposed research will be used concepts of facies analysis, architectural elements, and paleocurrent analysis to compose a depositional and paleogeographic framework to the Sete Lagoas Formation and the analysis of sedimentary cycles for basal succession of the Bambuí Group. The isotopic values of C and O obtained from detailed sections also will support the palaeoenvironmental characterization of the water body in which the unit was deposited. (AU)

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)
OKUBO, JULIANA; KLYUKIN, YURY IGOREVICH; WARREN, LUCAS VERISSIMO; SUBLETT, JR., D. MATTHEW; BODNAR, ROBERT J.; GILL, BENJAMIN C.; XIAO, SHUHAI. Hydrothermal influence on barite precipitates in the basal Ediacaran Sete Lagoas cap dolostone, Sao Francisco Craton, central Brazil. Precambrian Research, v. 340, MAY 2020. Web of Science Citations: 0.
OKUBO, J.; WARREN, V, L.; LUVIZOTTO, G. L.; VAREJAO, F. G.; QUAGLIO, F.; UHLEIN, G. J.; ASSINE, M. L. Evidences of seismic events during the sedimentation of Sete Lagoas Formation (Bambui Group - Ediacaran, Brazil). Journal of South American Earth Sciences, v. 98, MAR 2020. Web of Science Citations: 0.
UHLEIN, GABRIEL J.; UHLEIN, ALEXANDRE; PEREIRA, EGBERTO; CAXITO, FABRICIO A.; OKUBO, JULIANA; WARREN, LUCAS V.; SIAL, ALCIDES N. Ediacaran paleoenvironmental changes recorded in the mixed carbonate-siliciclastic Bambui Basin, Brazil. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v. 517, p. 39-51, MAR 1 2019. Web of Science Citations: 5.
OKUBO, J.; MUSCENTE, A. D.; LUVIZOTTO, G. L.; UHLEIN, G. J.; WARREN, V, L. Phosphogenesis, aragonite fan formation and seafloor environments following the Marinoan glaciation. Precambrian Research, v. 311, p. 24-36, JUL 2018. Web of Science Citations: 5.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
OKUBO, Juliana. Evolução sedimentar e paleoambiental da Formação Sete Lagoas (Grupo Bambuí, norte de Minas Gerais) no contexto das bacias sedimentares do Ediacarano terminal. 2019. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Geociências e Ciências Exatas..

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