Explosive eruptions at mid-ocean ridges driven by CO2-rich magmas
نویسندگان
چکیده
منابع مشابه
Magma Flow at Mid-Ocean Ridges
Liquid water is not stable under current martian surface conditions, but the presence of small gullies on the polewardfacing slopes of midto highlatitude martian surfaces suggests that erosion by liquid water might have occurred. Costard et al. (p. 110) developed a global climate model for Mars when it had a higher obliquity (about 300,000 years ago). Their model shows that more melting of the ...
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Transform faults at mid-ocean ridges--one of the most striking, yet enigmatic features of terrestrial plate tectonics--are considered to be the inherited product of preexisting fault structures. Ridge offsets along these faults therefore should remain constant with time. Here, numerical models suggest that transform faults are actively developing and result from dynamical instability of constru...
متن کاملThe Case for Reactive Crystallization at Mid-Ocean Ridges
Evidence from abyssal peridotites suggests that significant chemical reaction with peridotite can occur during the early stages of cooling and crystallization of mid-ocean ridge basalt (MORB) magmas. We evaluate the hypothesis that reactive crystallization (crystallization influenced by such melt^rock reaction) could cause magma compositions to evolve along a different chemical trajectory than ...
متن کاملMechanisms of normal fault development at mid-ocean ridges
[1] Slow spreading ridge segments are characterized not only by small, closely spaced faults that develop near the segment center but also by large, widely spaced faults that develop near the segment ends, typically at the inside corner of a ridge-offset intersection. In this study we investigate the competing effects of stress accumulation in the lithosphere and the yield strength of the litho...
متن کاملThe Structure of Mid-Ocean Ridges
Mid-ocean ridges provide an important window into the processes of mantle convection and magmatism. The formation, cooling, and eventual subduction of oceanic lithosphere dominate both the large-scale dynamics of the upper mantle and the Earth’s global heat loss. The melt generated during pressure-release melting of the upwelling mantle beneath mid-ocean ridges contributes most of the annual ma...
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ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2011
ISSN: 1752-0894,1752-0908
DOI: 10.1038/ngeo1104