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矿区位于康滇地轴南段。矿区地层主要为下昆阳群黑山头组和大龙口组,系一套浅变质的板岩、石英岩和碳酸盐岩。矿体呈层状、似层状、透镜状产于大龙口组底部条带状灰岩之中。严格受地层控制,沿层分布,层位稳定,与围岩呈整合接触,界线清楚。菱铁矿产于由碎屑岩过渡为碳酸盐岩的过渡带中。关于本矿床的成因,目前看法颇多。本文主要从元素的地球化学性质入手,分别对矿区的各地层、岩体及矿体进行了大量的数理统计,找出其相关关系,菱铁矿归属于沉积岩这一组。再根据矿物的差热分析,包裹体研究,硫同位素测定以及矿石中微最元素的研究,鲁奎山菱铁矿是属于沉积形成,后期受到了一定程度的改造,应为受变质矿床。
Mining area is located in the southern axis of Kangdi. The strata of the mining area are mainly the Lower Heishantou Formation and the Greater Longkou Formation of the Kunyang Group, a set of super-metamorphic slate, quartzite and carbonate rock. The ore body is lamellar, stratified and lenticular, which is produced in banded limestone at the bottom of the Dalongkou Formation. Strictly controlled by the formation, distributed along the strata, the strata are stable and are in integrated contact with the surrounding rock. The boundaries are clear. Siderite is produced in the transition zone from clastic rocks to carbonate rocks. The cause of the deposit, the current view quite a lot. In this paper, we start with the geochemical characteristics of the elements and conduct a large number of mathematical statistics on various strata, rock mass and ore body in the mining area to find out the correlation between them. The siderite belongs to the group of sedimentary rocks. According to the differential thermal analysis of minerals, the study of inclusions, the determination of sulfur isotopes and the study of the micro-elements in the ore, the Lukui Mountain siderite belongs to the sedimentary formation and has been transformed to a certain degree in the later period.