华北地台北缘绿岩带型铁磷矿地质及综合利用前景  

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

作　　者：夏学惠[1] 杨辉艳[1] 魏详松 

机构地区：[1]中化地质矿山总局地质研究院,河北涿州072754

出　　处：《地质与勘探》2012年第5期876-883,共8页Geology and Exploration

基　　金：中国地质调查局国土资源大调查项目(编码:200310300002)资助

摘　　要：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-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、Ni)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。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 metamor- phic host rocks belong to alkali- ferruginous and femic series. The major and trace elements in host rock are inconsistent with each other. The incompati- ble 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.

关 键 词：绿岩带型铁磷矿 地球化学 综合利用 华北地台北缘 

分 类 号：P618[天文地球—矿床学]