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Master's Dissertation
DOI
10.11606/D.44.1985.tde-28092015-104631
Document
Author
Full name
Silvia Helena de Mello e Sousa
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1985
Supervisor
Committee
Suguio, Kenitiro (President)
Castro, Joel Carneiro de
Fairchild, Thomas Rich
Title in Portuguese
Fáacies sedimentares das Formações Estrada Nova e Corumbataí no Estado de São Paulo
Keywords in Portuguese
São Paulo
Sedimentologia
Abstract in Portuguese
A Formação Estrada Nova, constituída dos membros Serra Alta (inferior) e Teresina (superior), aflora nas porções sudoeste e centro-sul do Estado de São Paulo. A Formação Corumbataí, presente no flanco nordeste do Estado, é considerada indivisa. O estudo de fáceis sedimentares propiciou, além da subdivisão litoestratigráfica acima citada, a reconstrução paleo-ambiental e o reconhecimento decompartimentação da Bacia do Paraná pelo Rio Tietê durante o Permiano Superior. Foram distinguidas nas formações Estrada Nova e Corumbataí, oito fácies e cinco subfácies, baseadas principalmente na associação de litologias e estruturas sedimentares primárias. As características das fácies sedimentares e as suas associações, levaram à identificação de depósitos de alto-mar (offshore), de zona de transição entre alto-mar (offshore) e face de praia (shoreface), de planície de maré, de barra de maré e lagunar. Na Formação Estrada Nova há um predomínio de sedimentos de alto- mar e de planície de maré, enquanto que a sedimentação da Formação Corumbataí teria ocorrido principalmente em zona detransição entre alto-mar e a face de praia. A deposição dessas formações teria ocorrido em mar epicontinental, em condições de estabilidade tectônica e aridez climática. A regressão do mar permiano é evidenciada pela gradação de sedimentos de alto-mar a planície de maré e de laguna costeira, pelo incremento de areias de cores avermelhadas e pela ocorrência de restos vegetais, tais como, Lycopodiopsis derbyi e Pecopteris spp.
Title in English
Not available.
Keywords in English
Not available.
Abstract in English
The Estrada Nova Formation, composed of the Serra Alta (lower) and Teresina (upper) members, crops out in the southwest and central-southern regions of the State of São Paulo. The Corumbataí Formation, northeast São Paulo, is considered a lateral equivalent but is indivisible. On the basis of the study of sedimentary facies, lithostratigraphic subdivision, paleoenvironmental reconstruction and the recognition of the compartmentalization of the Paraná Basin during the late Permian, have been possible. Eight facies and five subfacies were distinguished in the Estrada Nova and Corumbataí formations, based mainly on lithological association and primary sedimentary structures. The properties of these features permits the identification of deposits of offshore, transitional offshore-shoreface, tidal flat, tidal bar and lagoon environments. In the Estrada Nova Formation, the offshore and tidal flat deposits are predominant, whereas in the Corumbataí Formation sedimentation occurred mainly in the transitional offshore and shoreface environment. These formations were deposited in an epicontinental sea under tectonically stable condition and an arid climate. Regression of the Permian sea is evidenced by the upward passage of offshore sediments to tidal flat and lagoon sediments, by the increase of red sands and by the presence of plant fossils, such as, Lycopodiopsis derbyi and Pecopteris spp. In the middle and upper parts of these formations.
 
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Publishing Date
2015-10-01
 
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