TWO different spinels, analyses of which are given, occur in the layered ultramafic rocks at Dawros. Chrome spinel occurs both as gravity-stratified cumulates and as complex orbs, while an Al-rich spinel is both in rocks of the main Dawros magmatic sequence and in an association with an aluminous bronzite, which may originate by recrystallization. It is concluded that while the chrome spinel is...

The formation of isolated seamounts distant from active plate boundaries and mantle plumes remains unsolved. solitary intraplate volcano Vesteris Seamount is located in the Central Greenland Basin rises ∼3,000 m above seafloor with a total eruptive volume ∼800 km 3 . Here, we present new high-resolution bathymetry detailed raster terrain analysis, distinguishing cones, irregular volcanic ridges...

There is a well-established link between world-class gold telluride mineral deposits and alkalic magmatic host rocks, often emplaced post-subduction in arc terranes. Fiji home to two such deposits, provides an ideal location study the relationship (shoshonitic) their geodynamic context, potential roles metal enrichment. A total of 93 new geochemical analyses rocks from across are presented, alo...