A camptonite dike intruding graywacke in the Awatere valley, northern part of South Island, New Zealand, is part of a dike swarm constituting feeders for the overlying basalt, but this dike failed to reach the surface. The lower part of the dike is a layered section of pyroxenite, gabbro, and anorthosite, with the layering at a high angle to the dike margin. Above this section, irregular patches of pyroxenite occur, together with albite and analcite segregations, but layering is absent. The lower section is interpreted as a cognate xenolith, with the dike representing a remelting of a deeper layered mass. Analyses of the camptonite and titanaugite are given.