十万大山盆地晚二叠世、早三叠世烃源岩中铁元素丰度与有机碳丰度相关关系

A correlation between content of iron element and organic carbon in the source rocks, Late Permian to Early Triassic in the Shiwandashan Basin,South China

海相烃源岩中铁的来源受气候、时代、海水中生物量、海水性质、海洋基底等多因素影响。在稳定的浅海陆棚环境发育的泥岩中,铁元素丰度主要受控于沉积物颗粒大小和有机质丰度,铁元素丰度与有机碳丰度呈正相关关系。十万大山盆地的三化、大寺、旧城、油隘4个研究区域晚二叠世—早三叠世的陆棚泥岩沉积环境相对稳定,烃源岩中的铁元素丰度与有机碳丰度存在正相关性。深入研究铁元素丰度与有机碳丰度的相关性,可为地层对比以及判识沉积环境提供一定信息。

Abundance of iron in source rocks is effected by many factors,such as climate, different geological period, marine biomass, seawater natures and the kinds of sea floor. The interpreted of the sources rock of Late Permian to Early Triassic in the Shiwandashan Basin in Guangxi, China suggest that there is a good correlation between the content of organic carbon and the content of iron element in the argillaceous facies of the shallower shelf. The content of iron element in the argillaceous facies of the shallower shelf offered a kind of distinctive data source as biomass. The studies of correlation between the content of organic carbon and iron element would be present some important information for stratigraphic correlation and sedimentary environments identification.