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石碌富铁矿含铁岩系主要是指与铁矿有密切成因联系、同属一沉积旋回的岩层组合。它位于含矿地层——石碌群上部。石碌群是一套厚度较大、组份简单、原岩为具韵律结构的粉砂——泥质过渡类型岩石,间夹白云岩和砂岩。其岩层组合、旋回划分及含铁岩系在剖面中的位置见表1。我们认为,产于石碌群上部的富铁矿床具有明显的正常沉积成因特征。本文试就其含铁岩系的沉积形成条件作一初步分析。
The Shilu rich iron ore-bearing rock series mainly refers to the rock formation that is closely related to the iron ore and belongs to a sedimentary cycle. It is located in the ore-bearing strata - upper part of Shilu Group. Shilu Group is a set of thick, simple components, the original rock is a rhyolite structure of silt - muddy transitional type rocks, sandwiched between dolomite and sandstone. The rock formation combination, cycle division and iron rock in the profile of the location in Table 1. In our opinion, the iron-rich deposits produced in the upper part of Shilu Group have obvious normal sedimentary genetic characteristics. This paper tries to make a preliminary analysis on the sedimentary formation conditions of the iron-bearing rock series.