Basalts and mantle peridotites of mid-ocean ridges are thought to sample Earth's upper
mantle. Osmium isotopes of abyssal peridotites uniquely preserve melt extraction events …

The Earth's mantle constitutes over 80% of the planet's volume, and is therefore a key
reservoir in global geochemical cycling. The magnitudes and length scales of …

We performed reaction experiments between partial melt of volatile-free MORB-eclogite and
volatile-free fertile peridotite at 2.5–3GPa, 1375° C and 1440° C. The fraction of added …

We estimate the upper mantle temperature of the Antarctic Plate based on the thermoelastic
properties of mantle minerals and S velocities using a new 3‐D shear velocity model, AN1 …

The concentration of carbon in primary mid‐ocean ridge basalts (MORBs), and the
associated fluxes of CO2 outgassed at ocean ridges, is examined through new data …

Abstract The ultraslow eastern Southwest Indian Ridge (SWIR) offers an opportunity to study
the effect of magma supply on an ultraslow mid-ocean ridge starting from quasi-melt-free …

Along ultraslow-spreading ridges, where oceanic tectonic plates drift very slowly apart,
conductive cooling is thought to limit mantle melting and melt production has been inferred …

The global ridge system is dominated by oceanic rises reflecting large variations in axial
depth associated with mantle hotspots. The little-studied Marion Rise is as large as the …

Terrestrial oceanic and continental basalts are enriched by approximately+ 0.1‰ in
56Fe/54Fe ratio relative to primitive, undifferentiated meteorites (chondrites). The δ56Fe …

IODP Site U1309 was drilled at Atlantis Massif, an oceanic core complex, at 30° N on the
Mid-Atlantic Ridge (MAR). We present the results of a bulk rock geochemical study (major …