Volcanism is the surface expression of extensive magmatic systems, with their intrusive
counterpart representing~ 80% of the total magma budget. Our knowledge of igneous …

IODP Hole U1309D (Atlantis Massif, Mid-Atlantic Ridge 30° N) is the second deepest hole
drilled into slow spread gabbroic lithosphere. It comprises 5.4% of olivine-rich troctolites (~> …

Spinel and plagioclase peridotites from the Mt. Maggiore (Corsica, France) ophiolitic massif
record a composite asthenosphere–lithosphere history of partial melting and subsequent …

The architecture of lower oceanic crust at slow-and ultraslow-spreading ridge is diverse, yet
the mechanisms that produce this diversity are not well understood. Particularly, the 660 …

Beneath slow‐spreading ridges, melt bodies are generally considered to represent
ephemeral magma reservoirs filled with crystal mushes. Formation of the oceanic crust …

Several ODP-IODP expeditions drilled oceanic core complexes interpreted as exhumed
portions of lower crust close to the ridge axis, and provide the community with invaluable …

Reaction between mid‐ocean ridge basalt (MORB) and crystal mush in the lower oceanic
crust has been invoked to explain chemical variations of both MORB and minerals in the …

Magma migration and differentiation processes are key to understanding the development
and evolution of oceanic magma reservoirs. To provide new quantitative geochemical …

Abstract Olivine-rich troctolites (> 70% olivine) reveal that extensive melt impregnation of pre-
existing olivine-rich lithologies participate to the building of slow spread oceanic crust. To …

Microtextural and chemical evidence from gabbros indicates that melts may react with the
crystal framework as they migrate through crystal mushes beneath mid-ocean ridges; …