金鸡岭岩体北外带富铀成矿构造地球化学特征及构造成矿模式探讨

Discussion on metallgenetic model and tectonic-geochemistry features rich in uranium in north-outer belt of Jingjiling rock body

金鸡岭岩体北外带不仅存在良好的铀成矿地质条件 ,而且还具有富大铀矿的形成条件。构造控制占有重要而独特的地位。通过对含矿断裂带元素分带性研究 ,总结出铀矿体部位的元素组合特征 :Ba,P ,Co ,Ni,V为铀矿床原生晕前缘元素组合 ,Zn ,Cu为近矿指示元素组合 ,Mo ,Sn ,As,Sb为铀矿床尾部矿根元素组合。U ,Pb ,Cr,Be为铀矿体中组合元素。建立了本区铀矿构造地球化学成矿模式。

North outer belt of Jingjiling rock body not only has good geological conditions of uranium metallogenesis,but also the formation conditions of the rich large uranium deposits. The process controlled by structure is the most important and specific.According to evaluation of zonality of the elements on the ore host fractures,this paper summarizes the characteristics of element association in the uranium ore body. The element association of Ba,Co,Ni,V-the front association in primary halo of uranium deposits,Zn,Cu-the near-ore indicator elements,Mo,Sn,As,Sb-the root element association of the ore body,U,Pb,Cr,Be-the inner associated elements of ore body.The tectonic-geochemistry model of the uranium metallogenesis in the region has been established