MORB behavior in the mantle reflected by segment structure : an example of the northern Oman ophiolite

Abstract

It has been inferred that concordant dunite bands within the mantle section of the Oman ophiolite represent magma conduits beneath a mid-ocean ridge. However, chemical behavior of the magma during its upwelling within the mantle has been unclarified. We discuss MORB behaviors reflected by segment structure through observations and chemical analyses of the concordant dunite bands and surrounding peridotites of the northern Oman ophiolite, where segment structure of the ridge has been established.