Introduction: Ureilites are fragments of the mantle of a small (~100 km radius) asteroid that underwent ~30% partial melting at depths corresponding to pressures in the range 30-125 bars [1,2]. The preservation of oxygen isotopic heterogeneity on the ureilite parent body (UPB), despite high-T igneous processing [1], suggests that melts were extracted very rapidly. To determine if this was possi...

Lherzolite is one of the main units in the Ab-Bid ultramafic complex from Esfandagheh-HadjiAbad coloured mélange (South of Iran). The complex contains harzburgite, dunite, lherzolite and pyroxenite dykes and the lherzolites mainly occur in the margins. In the field, lherzolites occur as weakly foliated coarse-grained peridotites with shiny pyroxene grains and cut by neumerous pyroxenitic veins....

Abstract Most tungsten (W) and tin (Sn) deposits are associated with highly evolved granites derived from the anatexis of metasedimentary rocks. They commonly separated in both space time, rare cases where W Sn mineralization part a single deposit, two metals temporally separate. The factors controlling this behavior, however, not well understood. Our compilation whole-rock geochemical data for...

A number of recent quantitative mineralogical interpretations of S-type asteroids have identified compositions consistent with partially differentiated assemblages [e.g., 1-5]. However, partially differentiated meteorites (often designated as " primitive achon-drites ") constitute only a tiny fraction of the meteorite falls represented in terrestrial collections (~0.2% [6]). These two results w...

The question of whether layer decoupling and vortex-lattice melting occur seperately or not in the mixed phase of extremely type-II layered superconductors is studied through a partial duality analysis of the layered XY model with uniform frustration. We find that both transitions occur simultaneously if a sufficient degree of both layer anisotropy and of substrate pinning exists. PACS Indices:...

Oceanic basalts, such as mid-ocean ridge basalts (MORB) and ocean island basalts (OIB), are characterized by large isotopic and trace element variability that is hard to reconcile with partial melting of a peridotitic mantle alone. Their variability has been attributed to the presence of heterogeneities within the mantle, such as recycled crust, metasomatized material or outer core contribution...

The electrical conductivity of a synthetic basalt has been determined at atmospheric pressure in air at temperatures between 700 ø and 1600øC. The conductivity increases by about 2 orders of magnitude in the melting interval between 1130 ø and 1263øC. It is suggested that partial fusion in the seismic low-velocity zone of the upper mantle may account for the correlation of increased electrical ...

Mantle peridotites exposed in south Jazmourian comprise of lherzolite and porphyroclastic Cpx-bearing harzburgite in the lower part with chromitite lenses in the upper parts. Petrography and microprobe studies shows evidence of melt-peridotite interactions; post melting processes and subsolidus interactions, which has been associated with appearance of two generations of deformed primary pyroxe...