introduction geological background ophiolites have played a major role in our understanding of earth’s processes ranging from seafloor spreading, melt evolution and magma transport in oceanic spreading centers, and hydrothermal alteration and mineralization of oceanic crust to collision tectonics, mountain building processes, and orogeny. they provide the essential structural, petrological, geo...

Data collated from subalkaline lavas and dikes of Palaeogene ophiolites the SW Pacific in Papua, New Guinea, Caledonia, North Island, Zealand interpreted as having formed first upon subduction initiation, are investigated to determine whether these MORB like, similar other initiation IBM forearc. ophiolite mostly tholeiitic basalt; however, calc-alkaline comprise ~ 25% samples. Major element ab...

We investigated the crystal and structural behavior of Cr-bearing spinels from Archean chromitites Sittampundi (India), which had been subjected to very high-grade metamorphism. The data show that their oxygen positional parameters are among highest ever recorded for with similar Cr# Mg# those found other occurrences. general agreement between electron microprobe Mössbauer indicates analyzed st...