中文摘要：

中上扬子区海相层系烃源岩相对该区陆相烃源岩总体富硫，且不同层位、同层位不同岩性烃源岩硫含量差异明显，总硫含量与总有机碳含量间存在一定的正相关性。烃源岩中各种形态硫以有机硫和无机黄铁矿硫为主，单质硫在海相烃源岩中较常见，但占总硫含量的比例低。海相烃源岩硫同位素变化范围大，主要在-35‰-30‰，有机硫和单质硫同位素相对偏负，均值分别为-8．68‰和-5．65‰：黄铁矿和硫酸盐硫同位素则相对偏重，均值分别为4．15‰和2．19‰。

英文摘要：

Marine hydrocarbon source rocks in the Middle-Upper Yangtze region are rich in sulfur compared with terrestrial source rocks. Significant differences exist in sulfur content of source rocks in different formations or in the same formation with different lithology. There are obvious positive correlations between sulfur content and TOC of source rock. Sulfur in marine source rock exists mainly in form of organic sulfur and pyritic sulfur. Ele- mental sulfur is common in soluble extracts of marine source rock, but it has a variable content and occupies a lower percentage of total sulfur content. The δ34S value of sulfur in marine source rock has a broad variation range from -35‰ to 30‰. The average values of δ34S of organic sulfur and elemental sulfur are negative with -8.68‰ and -5.65‰ respectively, and those of pyritic sulfur and sulfate sulfur are positive with 4.15‰ and 2.19‰ respectively.