Abstract

Two definable magmatic suites occur within the plutonic complex in the Caledonian Falls area of the Troodos ophiolite, Cyprus. An early suite of generally well layered and structurally concordant gabbros and pyroxenites is intruded by a later suite of poikilitic wehrlites and gabbro-norites. Discordant structural relations can be demonstrated between units belonging to the two magmatic suites. Xenoliths near the contacts prove relative age relations. Differences in mineral chemistry between the two suites indicate that the parent magmas of the two suites were of different compositions. The petrogenesis of the two cumulate suites may be explained by a second-stage melting of a mantle diapir or by compaction of a zone of crystal mush below the Moho.

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