You are in the accessibility menu

Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/25094
Title: 
Sedimentation of the Cretaceous Bauru Group in São Paulo, Parana Basin, Brazil
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0895-9811
Sponsorship: 
  • Laboratorio de Estudo de Bacias - LEBAC (IGCE/UNESP)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Sponsorship Process Number: 
  • FAPESP: 04/06296-0
  • CNPq: 350983/1997-6
Abstract: 
The post-basaltic sediments of the Cretaceous Bauru Group in the Parana Basin cover an area of 117,000 km(2) in São Paulo State, and are subdivided into the Caiua, Pirapozinho, Santo Anastacio, Birigui, Aracatuba, Adamantina and Marilia formations. The sedimentation of Bauru Group was controlled by a combination of post-basaltic tectonism (responsible for the migration of the depocenters), erosion and climatic changes. Three main depositional phases are separated by two erosive/non-depositional phases defining depositional sequences. The fluvial-lacustrine deposition represented by the Caiua/Pirapozinho formations (first sequence), initially filled the basaltic substratum troughs. After an erosional interval, the Santo Anastacio Formation was deposited and overlapped (eastward) underlying beds (second sequence). Renewed erosion and tectonism initiated the last depositional sequence, with the migration of the depocenter to the Queiroz depression. High topographic gradients initially favored the accumulation of fluvial deposits of braided systems of the Birigui Formation. With the enlarging of the depositional area, a lacustrine system was formed (Aracatuba Formation) and overlapped by a fluvial system with progradation of lacustrine deltas (Adamantina Formation). The sedimentation of the Bauru Group ceased with deposition of marginal fans of Marilia Formation. (C) 2009 Elsevier Ltd. All rights reserved.
Issue Date: 
1-Jul-2009
Citation: 
Journal of South American Earth Sciences. Oxford: Pergamon-Elsevier B.V. Ltd, v. 28, n. 1, p. 25-39, 2009.
Time Duration: 
25-39
Publisher: 
Pergamon-Elsevier B.V. Ltd
Keywords: 
  • Bauru Group
  • Sedimentation
  • Depositional system
  • Stratigraphy
Source: 
http://dx.doi.org/10.1016/j.jsames.2009.02.008
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/25094
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

There are no files associated with this item.
 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.