Peridotites overlying the metamorphic sole of Oman ophiolite: an analog of the mantle wedge peridotite above the slab

Abstract

Mantle peridotites overlying the metamorphic sole from the Oman ophiolite were examined. They are predominated by harzburgite and lherzolite, and their degree of serpentinization notably decreases upward from the base. Olivine is Fo90.7 to 92.5, and the Cr# of spinel varies from 0.2 to 0.6. Recrystallized (neoblastic) pyroxenes are characteristically low in Al and Cr. Horblende is commonly found in the peridotites. These characteristics indicate low-temperature metamorphism assisted by aqueous fluids suppled from the metamorphic sole.