华北地台北缘绿岩带型铁磷矿地质及综合利用前景

通过对华北地台北缘绿岩带型铁磷矿成矿构造环境、含矿建造、矿床地球化学等几个方面的研究认为，该类矿床含矿建造原岩主要为岛弧一拉斑玄武岩，变质后容矿岩石属碱性-铁质、铁镁质系列。容矿岩石中主微量元素明显不和谐，岩石中不相容元素明显富集（Ba、Sr、Zr、P），相容元素（Cr、co、M）亏损。稀土元素含量高，模式图为向右倾斜平滑曲线，Ce轻度负异常。根据目前我国北方内生低品位共生铁磷矿开发利用情况，华北地台绿岩带型铁磷矿综合利用前景可观。

Geology and Comprehensive Utilization of the Greenstone Belt Iron-phosphate Deposit in the Northern Margin of North China Platform

In this paper, we studied the metallotectonic environment, ore-bearing formation and geochemistry of the greenstone belt iron-phosphate deposits in the northern margin of the North China platform. The result shows that the island arc-chlorite is the main native rock, and the post metamorphic host rocks belong to alkali- ferruginous and femic series. The major and trace elements in host rock are inconsistent with each other. The incompatible elements such as Ba, Sr, Zr and P are obviously enriched, but the compatible elements Cr, Co and Ni are depleted. Contents of REE are relatively higher, enriched in LREE, and show a weak negative Ce anomaly. By analogy with the present exploitation situation of the low-grade endogenetic iron-phosphorite deposits in north China, there will be a good prospect of comprehensive utilization of greenstone belt iron-phosphate deposits in the northern margin of the north china platform.