A petrological study of peridotite and pyroxenite xenoliths from the West Bismarck Arc and the Tabar-Lihir-Tanga-Feni Arc, Papua New Guinea
Some of the most refractory peridotite samples described in the literature comprise clasts up to 15 cm in size, hosted in satellite cones of Ritter Volcano in the West Bismarck Arc, Papua New Guinea. Host lavas are MgO-rich (13.9-16.6 wt%), mostly non-accumulative picritic tholeiites, representing the most primitive magma types in the region. The lava can be divided into two distinct geochemical groups: a low-Ti series (TiO2 0.25-0.3 wt%) and a high-TiO2...[Show more]
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