Banca de DEFESA: RICARDO DE SOUZA RODRIGUES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RICARDO DE SOUZA RODRIGUES
DATE: 14/12/2022
TIME: 08:00
LOCAL: videoconferência https://www.youtube.com/c/PPGGUFRNTransmiss%C3%A3odeBancas
TITLE:

Tectonic evolution of the easternmost segment of the Brazilian Equatorial Margin: Contribution of structural mapping (onshore) and physical modeling.

KEY WORDS:

Brittle deformation; Transform margins; Equatorial margin; Physical modeling.

PAGES: 267
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

The discovery in recent decades of hydrocarbon provinces associated with the Equatorial Atlantic transform margin, has generated a growing interest in better understanding the evolution of this margin, being considered a new exploratory frontier. The geodynamic models consolidated in the literature have their interpretations predominantly based on the analysis of indirect data. In the present work, the pre- to syn-development evolution of the Brazilian equatorial margin (BEM) was investigated, from the application of the physical structural modeling tool, and the multiscale analysis of the brittle deformation record present in the onshore crystalline basement of the Potiguar and Ceará basins. The modeling data show a dominantly oblique kinematic regime (α = 20º) active during the rifting of this margin, resulting in the formation of diachronic oblique and pull-apart depocenters. The easternmost segment of the BEM has shown evidence of the superimposed deformational events related to pre- and syn-structuring of this margin. The oldest event (D1, Late-Brazilian) expresses a NE-SW intraplate dextral transpression associated with the progressive exhumation of the Brazilian-Pan-African orogenic chain. The D2 event (Neo-Jurassic to Aptian) exhibits an NW-SE extensional paleofield compatible with the active one that occurred during the formation of the Brazilian East Margin. The D3 (Aptian) event, the initial of the installation of the equatorial proto-margin, has a E-W dextral kinematic transtensional. The youngest event (D4) exhibits a N-S compressional and E-W extensional. This event was interpreted as related to rotation and drift between post-Aptian tectonic plates. Previous anisotropies, such as the Transbrasiliano Lineament (TBL), can control the nucleation and structuring of sedimentary basins. The role played by the TBL in structuring of the BEM, however, is still poorly understood. Thus, the physical modeling data indicate that the TBL was reactivated during the development of the BEM, controlling the structuring, configuration and deformation of the sub-basins that compose the Ceará Basin.

COMMITTEE MEMBERS:
Presidente - 1217847 - FERNANDO CESAR ALVES DA SILVA
Externo à Instituição - ANDRÉ DANDERFER FILHO - UFOP
Externo à Instituição - BARBARA TRZASKOS - UFPR
Externo à Instituição - MARIO NETO CAVALCANTI DE ARAÚJO - PETROBRAS
Externo à Instituição - NOBERTO MORALES - UNESP