XRD and SEM results show that Fe-dolomites and calcites are the dominant minerals in the authigenic carbonates, which occurred mainly in pore-rich spheroids and un-regular aggregations.

• 光粉晶衍射(XRD)和扫描电镜(SEM)结果显示碳酸盐岩颗粒的主要矿物成分是铁白云石和方解石，呈多孔状结核和不规则状集合体产出。