江西省相山铀矿田居隆庵地区富矿体形成条件及找矿方向

Formation Conditions and Prospecting Direction of Rich Ore Body in Julong’ an Uranium Area,Xiangshan Ore Field,Jiangxi Province

居隆庵地区是江西省相山铀矿田内一个初具规模的铀矿集中区,区内近年来开展的铀矿地质勘查工作主要集中在居隆庵矿床、李家岭矿床、龙巴岭矿床和二十一号带矿床。这4个矿床的铀平均品位虽达不到富矿床的标准,但存在较多的富矿体。这些富矿体的分布具有一定的规律,主要赋存在断裂旁侧次级裂隙收敛及撒开部位、断裂与岩性界面交汇复合部位、不同岩层界面变异部位,且经历了多期次的成矿热液活动。在总结该地区富矿体赋存规律的基础上,认为当各种控矿因素相互复合叠加时,铀矿体品位高,厚度大。各种控矿因素相互复合叠加是富矿体形成的先决条件,各种控矿因素复合叠加部位是今后找寻富矿的主要方向。

Julong’ an is a large uranium deposit concentration area in Xiangshan uranium ore field,in Jiangxi province. Recent uranium geological exploration mainly has been concentrated in Julong’ an deposit,Lijialing deposit, Longbaling deposit and the 21 belt deposit. Although the average uranium grade of these four deposits are all not up to the high grade standard, there are many rich ore bodies. The distribution of these rich orebodies comply with certain patterns, they mainly occurs in the convergent or spreading parts of the secondary fractures on the side of faults,the intersection of fault and lithology interface,variation of different strata interface. By summing up the occurrence pattern of rich orebodies in this area,it was found that the ore body become richer and larger when all ore-controlling factors superimposed together. The compound superposition of various ore-controlling factors is the precondition for rich orebody formation which can be regarded the main direction for searching rich deposit.