(Table 1) Concentrations and isotopic ratios of sulfur and carbon in acid conglomerates from DSDP Hole 57-439

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.

本次测试测得1件流纹岩（rhyolite）与4件英安岩（dacite）砾岩（conglomerates）样品的硫含量较低，介于9至97 ppm之间，与日本群岛第四纪安山岩及玄武岩的硫含量特征相近。然而，相较于卡农迪亚布洛陨石（Canon Diablo meteorite）中的陨硫铁（troilite），上述样品的δ34S值出乎意料地偏高，区间为+23‰至+35‰。5件样品的硫化物/硫酸盐比值介于0至13，且不同样品间该比值存在差异。硫酸盐硫与硫化物硫之间未出现显著的同位素分馏现象。本次样品中的碳主要以碳酸盐形式赋存，大概率伴随CO₂；其浓度范围为128至721 ppm，δ13C值（相对于佩德贝雷姆尼特标准（PDB））介于-2.5‰至-20.7‰之间。