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鲁奎山铁矿地处川滇南北向构造带南段,青扬(青龙厂——扬武,下同)断裂与通海山字型构造前沿弧西翼的复合部位。铁矿赋存于下昆阳群浅变质岩系大龙口组底部条带状灰岩中,呈层状、似层状顺层产出,垂直分带明显。矿石中硫、磷含量均低,自熔、半自熔矿石居多,为优质菱铁矿。矿床除受层位岩性控制,沉积特征明显外,矿石还多已变质重结晶,次生氧化富集现象亦较显著,具后期改造特征。因此,系多阶段、多期次形成的沉积改造菱铁矿床。
Lu Kuishan Iron Mine is located in the southern section of the south-north Sichuan-Yunnan tectonic belt. The Qingyang (Qinglongchang-Yangwu, the same below) fault and the composite part of the arc-west wing of the Tonghe seamounts. The iron ore occurs in the lower part of the Longlukou Formation in the lower Kunyang Qu metamorphic strata. The strata are stratified and appear to be stratified and stratified, with obvious vertical zonation. Ores in the sulfur, phosphorus content is low, self-melting, mostly semi-self-melting ore, high-quality siderite. In addition to being controlled by lithology and sedimentary features, the ore deposits have also been metamorphosed and recrystallized. Secondary oxidation and enrichment are also significant, with the characteristics of later alteration. Therefore, the multi-stage, multi-stage sedimentary transformation of siderite deposits.