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本文对滇东北部地区产于下寒武统渔户村组的磷矿地质区域调查资料进行了综合,概略介绍了含磷层位,磷矿层厚度、品位及其变化,并对成磷前后的岩相古地理条件作了分析,对磷矿成因作了探讨。磷矿形成富集于渔户村中期,前阶段(相当于含磷岩段)仅在海凹中心形成工业磷矿层,总貌是偏贫的;后阶段(相当于磷块岩段)海凹普遍成矿,其中有富而稳定的磷矿层。碳酸盐型的矿石品位最佳,其次为硅质岩型;认为磷矿的厚度品位较好者一般处于海凹中心或较低凹的地段,属活动地台型海相生物——化学沉积型磷块岩矿床。
In this paper, the survey data of phosphate rock geology area in the Lower Cambrian Fishermen Group in the northeastern Yunnan are comprehensively summarized, the thickness, grade and change of the phosphate rock layer, phosphate rock layer are introduced. Lithofacies palaeogeographic conditions were analyzed, the causes of phosphate rock were discussed. The formation of phosphate rock is enriched in the mid-term of the fishermen’s village. The former phase (equivalent to the phosphate rock segment) forms an industrial phosphate rock only in the center of the sea and the concave depression. The overall appearance is poorer. In the latter stage (equivalent to the phosphate rock segment) Concave common mineralization, including rich and stable phosphate rock layer. Carbonate ore grade is the best, followed by siliceous rock type. It is considered that the thickness grade of phosphate rock is generally located in the center of sea-pit or lower depression, which is an active platform-type marine biological-chemical deposition Type phosphorite deposit.