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The Nurali massif is a small ophiolite located along the Main Uralian Fault in the Southern Urals. It includes a mantle sequence, a transition zone and a melange zone, with an intrusive, gabbro to oxide-diorite, unit interposed between the transition zone and the melange. Various igneous rocks occur as exotic blocks within the Nurali melange, including tholeiitic (gabbro to diorite) and calc-alkaline...
The Moho transition zone above residual peridotites of the Nurali ophiolite is represented by a layered dunite-wehrlite-clinopyroxenite sequence with an enstatite-olivine upper part. The absence of deformational fabric patterns of solid-state flow sets up a problem of the magmatic nature of the Nurali transition zone ultramafics. It is interpreted to be the product of a multistage magmatic crystallisation...
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