Banca de DEFESA: CARLA GABRIELA DO LAGO MONTENEGRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CARLA GABRIELA DO LAGO MONTENEGRO
DATE: 10/09/2020
TIME: 09:00
LOCAL: Videoconferencia
TITLE:

Barreirinhas Basin internal architecture and the fingerprints of the transform movements along the Romanche Fracture Zone, Brazilian Equatorial Margin

KEY WORDS:

Barreirinhas; Brazilian Equatorial Margin; Romanche Fracture Zone; Seismic Interpretation; Transtensional Tectonics

PAGES: 76
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

The Barreirinhas Basin is located in the central portion of the Brazilian Equatorial Margin (MEB). Its origin is linked to the rifting and fragmentation process of West Gondwana in the Early Tertiary. It happened when the continental lithosphere in the north of the Barreinhas Basin was uplifted and fractured by transforming movements Romanche Fracture Zone (RFZ). This basin was controlled by a mixed tectonic regime: distensional efforts, resulted from the separation of the Supercontinent, associated with shearing efforts. One of the objectives is to investigate how the RFZ has been influencing the evolutionary history and the main structures of the Barreirinhas Basin. In addition, the study was important to favoring the contribution of knowledge about the region through the construction of geophysical and geological models, which structurally and stratigraphically portray the internal architecture offshore and onshore portions of the basin. For this purpose, eight 2D seismic sections were interpreted together with information from five well geophysical profiles. In order to assist in the interpretation process, seismic attributes were used to highlight both seismic stratigraphic horizons and structural features. The results show the predominance of lytic faults of normal tailings in the rift sequence and the presence of transtensional kinematics, represented by negative flower structures, due to the dextral movement during the separation of South America and Africa. In the more distal portions of the emerged basin, it is observed that reactivations of the RFZ influenced from Aptiano structures to the Holocene, and therefore have a strong impact on the evolutionary history of the Brazilian Equatorial Margin, in particular, the Barreirinhas basin

BANKING MEMBERS:
Externo à Instituição - DAVID LINO VASCONCELOS
Presidente - 2042405 - MOAB PRAXEDES GOMES
Externo à Instituição - Pedro Xavier Neto - PETROBRAS