Abyssal peridotites are ultramafic rocks collected from mid-ocean ridges that are the
residues of adiabatic decompression melting. Their compositions provide information on the …

Carbon is a key control on the surface chemistry and climate of Earth. Significant volumes of
carbon are input to the oceans and atmosphere from deep Earth in the form of degassed …

New investigations of the Southwest Indian and Arctic ridges reveal an ultraslow-spreading
class of ocean ridge that is characterized by intermittent volcanism and a lack of transform …

When Harry Hess first proposed the theory of seafloor spreading, he imagined that mantle
peridotite upwelling at midocean ridges reacted with water to form a serpentinite oceanic …

The subducting oceanic lithosphere may carry a large amount of chemically bound water
into the deep Earth interior, returning water to the mantle, facilitating melting, and hence …

The formation of basaltic crust at mid-ocean ridges and ocean islands provides a window
into the compositional and thermal state of the Earth's upper mantle. But the interpretation of …

The" magmatic budget hypothesis" proposes that variability in magma supply is the primary
control on the large-scale hydrothermal distribution pattern along oceanic spreading ridges …

Volcanic hotspots are thought to be fed by hot, active upwellings from the deep mantle, with
excess temperatures (T ex)~ 100° to 300° C higher than those of mid-ocean ridges …

Crustal accretion at mid-ocean ridges governs the creation and evolution of the oceanic
lithosphere. Generally accepted models,,–of passive mantle upwelling and melting predict …

The petrological parameters Na8 and Fe8, which are Na2O and FeO contents in mid-ocean
ridge basalt (MORB) melts corrected for fractionation effects to MgO= 8 wt%, have been …