Mineralogy and geochemistry at DSDP Hole 62-465A

Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of low-temperature diagenetic processes. The iron-sulfide phases are biogenic and their concentrations mark the diffusion of sea water sulfate through sedimentary horizons containing abundant organic matter and mafic, glassy volcanogenic detritus.

There is some evidence, however, that elevated temperatures augmented or intensified the synsedimentary diagenetic process.