【摘要】 通过中国若干下寒武统高硒地层的有机地球化学及生物标志物研究，认为高硒地层中有机质的先质母体为菌藻类生物，某些生物标志物指标指示了沉积环境为封闭的缺氧环境。同时，文章结合地质实际讨论还原的沉积环境有利于菌藻类生物的生长和保存，硒的富集与菌藻生物的繁盛有关。更多还原

【Abstract】 Organic geochemistry and biomakers of some Lower Cambrian high-selenium formations in China are studied, the results show that main organism contain the low and aquatic homonemeae in all these high-selenium formations (HSF), and some biomakers indicate sedimentary environment might mainly be close and anoxic condition. At the same time, based on geological facts, it is considered that reductive sedimentary environment is advantageous to growth and preservation of homonemeae, and enrichment of selenium is closely relative to bloom of homonemeae.更多还原