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安宁县龙山磷矿是该县工业局发现,曾委托昆钢地质队对珍珠泉以西的一段进行了初步评价。1982—1983年,省地矿局第一地质大队在开展昆明地区磷矿普查工作中,对龙山磷矿进行了系统的地表揭露,通过取样分析和万分之一地质填图,查明该地为一轴向北西—南东,北西部被断层破坏的不完整背斜构造;背斜两翼保存有早寒武纪的地层,其中有富厚的磷矿层,评价结果为一中型富磷矿床。
Anning County, Longshan phosphate rock is found County Bureau of Industry, Kunming Geological team entrusted to the Pearl River west of a preliminary evaluation. In 1982-1983, the First Geological Unit of Yunnan Provincial Bureau of Geology and Mineral Resources conducted a systematic surface survey on the phosphate rock in Kunming in carrying out the survey of phosphate rock in Kunming area. Through sampling analysis and one ten-thousandth geological mapping, It is an incomplete anticlinal structure damaged by faults in the northwest-south-east and north-west regions. Precambrian reservoirs are conserved in the anticlinal wings, of which there are rich and thick phosphate rock formations. The evaluation result is a medium-sized phosphate-bearing ore bed.