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。图2参24 The source of iron in marine source rocks is influenced by many factors, such as climate, age, biomass in seawater, nature of seawater and ocean floor. The abundance of iron is mainly controlled by sediment particle size and organic matter abundance in the mudstone with stable shallow shelf environment. There is a positive correlation between iron abundance and organic carbon abundance. Sedimentary environments of the Late Permian-Early Triassic continental shelf mudstone in the four studied areas of Sanyuan, Great Temple, Old City and Youigui in the Shiwandashan Basin are relatively stable. The abundance of iron and the abundance of organic carbon There is a positive correlation between degrees. Further studies on the relativity between iron abundance and organic carbon abundance can provide certain information for stratigraphic correlation and sedimentary environment identification. Figure 2 reference 24