Sulfur isotopic profile through the Troodos Ophiolite, Cyprus: preliminary results and implications

Abstract

The sulfide mineralogy, sulfur contents, and sulfur isotopic compositions were determined for a section through the Troodos Ophiolite. The composite section includes volcanics altered at low temperature, a subsurface sulfide mineralization, hydrothermally altered sheeted dikes, and underlying gabbros. Overall, processes affecting sulfur in the Troodos Ophiolite are generally similar to those occurring in oceanic crust. The δ34S values for the Troodos section average around +5‰ and are higher than those for oceanic crust, however, which average around 0 to +1‰. The 34S-enrichment of ophiolitic crust is attributed to incorporation of greater amounts of seawater-derived S in the ophiolite, plus the possibility of a component of 34S-enriched arc-like primary sulfur. -from Author