Banca de QUALIFICAÇÃO: HELIÁSIO AUGUSTO SIMÕES
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.STUDENT : HELIÁSIO AUGUSTO SIMÕES
DATE: 15/09/2021
TIME: 14:00
LOCAL: videoconferência https://meet.google.com/yqs-zufc-tsw
TITLE:
Oceanic Core Complex of the Equatorial Mid-Atlantic Ridge (0o 50’ to 7o 10’ North)
KEY WORDS:
Mantle uplift; Oceanic Core Complexes; Equatorial Mid-Atlantic Ridge.
PAGES: 30
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:
Mantle uplift is a common mechanism in tectono-magmatic evolution of slow and ultra-slow spreading ridges, such as the Equatorial Mid-Atlantic Ridge (EMAR). We identified large exposures of upper mantle/lower crust rocks, the Oceanic Core Complexes (OCC's), in the research area, which extends from São Paulo FZ (0o 50’ N) to Bogdanov FZ (7o 10’ N). We collected new geophysical data during the 1st and 2nd expeditions of the Geological Survey of Brazil (GSB) to DMAE, covering an area of 40,000 km2 of high-resolution (100m/pixel) bathymetry data. We had a dorsal segmentation by three large FZ and ten small NTD, with exposure of twelve large regions with exhumation of mantle rocks, the OCC's. This large exhumation of mantle rocks in DMAE has implications for its tectono-magmatic evolution, corroborating its construction/evolution with magmatic deficit.
BANKING MEMBERS:
Presidente - 2042405 - MOAB PRAXEDES GOMES
Interno - 1315614 - DAVID LOPES DE CASTRO
Externa à Instituição - NATASHA SANTOS GOMES STANTON - UERJ