Magmatic processes under mid-ocean ridges: A detailed mineralogic study of lavas from East Pacific Rise 9°30′N, 10°30′N, and 11°20′N

Tectonic, Magmatic, Hydrothermal and Biological Segmentation of Mid-Ocean Ridges

Volcanic eruptions on mid-ocean ridges: New evidence from the superfast spreading East Pacific Rise, 17 –19 S

[1] Side-scan sonar, submersible observations and sampling of lava flows from the East Pacific Rise, 17 –19 S constrain the character and variability of submarine volcanic eruptions along mid-ocean ridges. Nine separate lava sequences were mapped using relative age and lithological contrasts among recovered samples. Axial lengths activated during eruptive episodes range from 1 to >18 km; indivi...

The 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...

CO fluxes from mid - ocean ridges , arcs and plumes 2

Estimates of CO emissions at spreading centres, convergent margins, and plumes have been reviewed and upgraded 2 using observed CO r He ratios in magmatic volatiles, He content estimates in the magmatic sources, and magma 2 emplacement rates in the different tectonic settings. The effect of volatile fractionation during magma degassing, Ž . investigated using new rare gas and CO abundances dete...

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 ...