The sulfur content of one rhyolite and four dacite conglomerates was found to be low - from 9 to 97 ppm - similar to that of Quaternary andesites and basalts of the Japanese Islands. However, the d34S values of these samples are unexpectedly high - +23 to +35 per mill - relative to troilite from the Canon Diablo meteorite. The sulfide/sulfate ratios vary among the five samples from 0 to 13. No significant isotope fractionation seems to exist between sulfate and sulfide sulfurs. Carbon in these samples is predominantly in the form of carbonate (and probably CO2). It ranges in concentration from 128 to 721 ppm and in d13C from -2.5 to -20.7 per mill relative to PDB.

Empty cells = no data.

Supplement to: Sakai, Hitoshi; Ueda, Akira (1980): Sulfur and carbon isotope ratios of dacite and rhyolite conglomerates from Site 439, Leg 57, Deep Sea Drilling Project. In: Scientific Party, Initial Reports of the Deep Sea Drilling Project, 56/57 (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 56-57, 1285-1288