Initially, it may seem extremely daunting to be sitting in front of several thousand carats of
small diamonds, knowing that the likelihood of finding a diamond with a meaningful …

Subduction zones are where sediments, oceanic crust, and mantle lithosphere return to and
reequilibrate with Earth's mantle. Subduction zones are interior expressions of Earth's …

Peridotite xenoliths from the Olmani cinder cone, northern Tanzania, possess distinctive
mineralogical and chemical features interpreted to result from interaction of ultra-refractory …

Mantle metasomatism is a relatively recent concept introduced in the early 1970s when
detailed studies of lithospheric mantle rock fragments (xenoliths), brought to the surface of in …

A model is developed for the origin of ultrapotassic melts by melting of veined lithosphere;
the veins are rich in clinopyroxene and mica, whereas the wall-rocks consist principally of …

Most variations in composition among primitive basalts from the Mariana back-arc trough
can be explained by melting mixtures of an NMORB-type mantle source and an H 2 O-rich …

Petrological and geochemical data are presented for a suite of ultramafic xenoliths
(lherzolites and wehrlites) from La Grille volcano, Grande Comore island. These xenoliths …

Geothermobarometric calculations for a worldwide database of inclusions in diamond
indicate that formation of the dominant harzburgitic diamond association occurred …

The experimental discovery that sodic dolomitic carbonatite melt can be generated in
equilibrium with pargasitic lherzolite [1] at pressures corresponding to depths of 90 km or …

A review of previous work relevant to the formation of concentrations of chromite in
peridotites from ophiolitic (sl) sequences highlights some of the key problems in …