Produção Nacional
COMPARTIMENTAÇÃO ESTRUTURAL DAS FORMAÇÕES PIRAMBÓIA E BOTUCATU NA REGIÃO DE SÃO JERÔNIMO DA SERRA, ESTADO DO PARANÁ
2004; Sociedade Brasileira de Geologia; Volume: 34; Issue: 3 Linguagem: Inglês
10.5327/rbg.v34i3.1116
ISSN2317-4889
AutoresMichael Strugale, Sidnei Pires Rostirolla, Fernando Mancini, Carlos Vieira Portela Filho,
Tópico(s)Groundwater and Watershed Analysis
ResumoThe description and interpretation of the structural framework in the Piramboia and Botucatu formations (Sao Bento Group – Mesozoic) of the intracratonic Parana Basin is presented. The study area is located in Parana State (South Brazil) which include the city of Sao Jeronimo da Serra, southeastern portion of the Parana Intracratonic Basin. The stratigraphic sequence comprises aeolian porous quartz-sandstones and subordinate conglomerates and siltstones which constitute potential hydrocarbon and groundwater reservoirs, involving one of the most important recharge areas of the Guarani Aquifer System. In terms of the regional geological context, the area is located at the northeastern side of the Ponta Grossa Arch, specifically at the Sao Jeronimo – Curiuva magnetic lineament, which exhibits a notorious density of dolerite dykes and associated faulting system (average strike N45W). Field data, structural and 3D digital relief modeling and analysis and aerial photograph interpretation were used. The first-order structural feature is a conjugate fracture system described as: 1) normal to sinistral N35-80W faults associated with zones of major lineament concentration, dykes and deformation bands; 2) secondary N50E dextral faults locally associated with deformation bands. Secondary E-W and N-S faults were also observed, which together with the first-order structural features promote an important compartmentation of the Guarani Aquifer and allow for the hydrocarbon migration in the Parana Basin during the Late Cretaceous.
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