Abstract

The fabrics of nineteen ultramafic nodules from seven localities in Auckland province allow recognition of five orientation rules for olivine. These rules are independent of rock type, textural setting, or locality. Enstatite fabrics show no consistent relationship to those of olivine. A gradational series of physical environments, with increasing deformation and recrystallization, can explain the full range of nodule textures and fabrics and may be applicable to some peridotites in the New Zealand ultramafic belt.

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