Banca de DEFESA: ADENILSON DA SILVA PEIXOTO JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ADENILSON DA SILVA PEIXOTO JUNIOR
DATA : 17/02/2020
HORA: 14:00
LOCAL: AUDITÓRIO B INSTITUTO DE GEOCIÊNCIAS UFBA
TÍTULO:

THE ROLE OF STRUTUTURAL BASEMENT HERITAGE ON NUCLEATION OF THE MATACATU FAULT SYSTEM, RECONCAVO BASIN, BAHIA, BRASIL. NEW EVIDENCE.

PALAVRAS-CHAVES:

Basement inheritance; Mafic dikes; Suture zone; Recôncavo Basin.

PÁGINAS: 39
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Geotectônica
RESUMO:

The Recôncavo Basin (BR) is located at southern portion of the rift system Recôncavo-Tucano-Jatobrá, specifically at the east side of Bahia. It shows NE-SW orientation and is structurally controlled by faults: (i) longitudinal N000-010, faults system (SF) of Maragogipe flexural border, and N030°-040° SF of Salvador edge and (ii) transversal N090°-100°, SF of Barra and N120°-N130° regarding to SF of transference. The Mata-Catu Fault System (SFMC), the main aim of this work, has an orientation of N150 ° -160 °, which is suggested to be a clearly structural discrepancy not easily explained mechanically by the models published of rift opening by E-W and NW-SE extensions. In addition, this system controls BR's significant hydrocarbon (HC) concentrations. Thus, this work sought to perform a detailed structural analysis of SFMC, in order to correlate under basin basement’s structures with those from the basin. For that, it was necessary to make a bibliographic review of the structures present in BR and its foundation, carry out field activities throughout the SFMC and analyze gravimetric and aeromagnetic anomaly maps. The result can be is explained according to two hypothesis for the structural inherence of the basement in the trend of the SFMC: (i) a swarm of mafic dikes from the Coastal Province of Bahia, dated 0.92 Ga and (ii) the suture zone between two tectonic blocks. Both possibilities could be crucial for understanding of this system. Especially regarding to fluid percolation and crustal thermal input which have fundamental importance for HC maturation.

MEMBROS DA BANCA:
Interno - 268656 - LUIZ CESAR CORREA GOMES
Externo ao Programa - 5196747 - CARLSON DE MATOS MAIA LEITE
Externo à Instituição - ARACY SOUSA SENRA - UFS