ORCID Profile
0000-0001-5282-0690
Current Organisations
Texas A&M University
,
Universidade Federal Fluminense
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Publisher: American Geophysical Union (AGU)
Date: 12-2019
DOI: 10.1029/2018JB016858
Abstract: 809 deep IODP Hole U1473A at Atlantis Bank, SWIR, is 2.2 km from 1,508‐m Hole 735B and 1.4 from 158‐m Hole 1105A. With mapping, it provides the first 3‐D view of the upper levels of a 660‐km 2 lower crustal batholith. It is laterally and vertically zoned, representing a complex interplay of cyclic intrusion, and ongoing deformation, with kilometer‐scale upward and lateral migration of interstial melt. Transform wall es over the gabbro‐peridotite contact found only evolved gabbro intruded directly into the mantle near the transform. There was no high‐level melt lens, rather the gabbros crystallized at depth, and then emplaced into the zone of diking by diapiric rise of a crystal mush followed by crystal‐plastic deformation and faulting. The residues to mass balance the crust to a parent melt composition lie at depth below the center of the massif—likely near the crust‐mantle boundary. Thus, basalts erupted to the seafloor from ,550 mbsf. By contrast, the Mid‐Atlantic Ridge lower crust drilled at 23°N and at Atlantis Massif experienced little high‐temperature deformation and limited late‐stage melt transport. They contain primitive cumulates and represent direct intrusion, storage, and crystallization of parental MORB in thinner crust below the dike‐gabbro transition. The strong asymmetric spreading of the SWIR to the south was due to fault capture, with the northern rift valley wall faults cutoff by a detachment fault that extended across most of the zone of intrusion. This caused rapid migration of the plate boundary to the north, while the large majority of the lower crust to spread south unroofing Atlantis Bank and uplifting it into the rift mountains.
Publisher: International Ocean Discovery Program
Date: 15-12-2020
Publisher: American Association for the Advancement of Science (AAAS)
Date: 17-01-2020
Abstract: Around the time of the end-Cretaceous mass extinction that wiped out dinosaurs, there was both a bolide impact and a large amount of volcanism. Hull et al. ran several temperature simulations based on different volcanic outgassing scenarios and compared them with temperature records across the extinction event. The best model fits to the data required most outgassing to occur before the impact. When combined with other lines of evidence, these models support an impact-driven extinction. However, volcanic gases may have played a role in shaping the rise of different species after the extinction event. Science , this issue p. 266
Publisher: Associacao Brasileira de Pesquisadores em Comunicacao e Politica (Compolitica)
Date: 15-09-2019
DOI: 10.21878/COMPOLITICA.2019.9.2.353
Abstract: Apresentação da nova edição da Revista Compolítica.
Publisher: Associacao Brasileira de Pesquisadores em Comunicacao e Politica (Compolitica)
Date: 30-12-2019
DOI: 10.21878/COMPOLITICA.2019.9.3.395
Abstract: Apresentação da nova edição da Revista Compolítica.
Publisher: Associacao Brasileira de Pesquisadores em Comunicacao e Politica (Compolitica)
Date: 29-05-2020
DOI: 10.21878/COMPOLITICA.2020.10.1.463
Abstract: Editorial da Revista Compolítica 2020.1.
No related grants have been discovered for Peter Blum.