Petrology and Geochemistry of Knobby Peridotite Zones within Unltramafic Flows at Pyke's Hill, Munro Township, Ontario

Abstract

<p>Knobby peridotite forms a distinctive zone within the cumulus member of spinifex and non-spinifex bearing ultramafic komatiitic flows. Detailed measurements of flows at Pyke's Hill indicate the relative abundance and spatial relationships of knobby peridotites within specific types of flows. Petrographic and geochemical analysis (including whole rock, rare earth and neutron activation) have been implemented and discussed in terms of a comparison to analysis of other zones within the flow. Polished sections indicate relationships between silicate and opaque mineralogy.</p>