摘要
湘桂粤地区地层和自源层控矿床中硫化物δ^(34)S研究表明,硫主要来自同期海水。δ^(34)S不仅受海相硫酸盐δ^(34)S控制,而且受生物演化影响,同位素还原分馏效应增大;受海侵旋迥影响,δ^(43)S具周期性变化;受沉积古地理位置、水源、水体环境等因素制约,具区域性变化。
Sulfur isotopic studies of sulfides from the strata and related strata-bound deposits in the Hunan-Guangxi-Guangdong area indicate that the sulfur comes predominantly from contemporaneous seawater sulfates. The δ34S of the sulfides is controlled not only by that of marine su-Ifates, but also by biological evolution. The enhancement of isotopic reduction fractionation effect is affected by transgressive cycle, and therefore δ34S is of periodic and regional variation. This variation trend is related to a number of factors such as sedimentary-paleogeographical position, water source, waterbody environment and so on.
出处
《地球化学》
CAS
CSCD
北大核心
1990年第2期117-126,共10页
Geochimica
