粤北石人嶂钨矿放射性矿化研究
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摘要
粤北石人嶂石英脉型钨矿床的石英脉、花岗岩、云英岩均发育晶质铀矿、含钍晶质铀矿、钍石、方钍石等系列放射性矿物。为了探寻是否存在放射性矿化,笔者通过系统测试发现以下规律:1)矿区含钨石英脉的放射性元素(U、Th)含量相对较低,绝大多数样品比地壳克拉克值还低;2)花岗岩的平均含量均比华南产铀花岗岩高出2~10倍;3)云英岩的U、Th含量更高,而富含硫化物的钨矿脉U、Th含量也很高,并发育放射性矿物;4)自550~340m中段,各类地质体或不同矿脉的放射性元素含量呈现由小→大的变化趋势;5)矿区深部及富含硫化物钨矿脉和云英岩是寻找放射性矿化的重要方向。研究成果可为矿山资源综合利用及放射性防护工作提供地质依据。
Some radioactive minerals such as uraninite,thorium containing uraninite,thorite and thorium occur in the quartz vein,granite and greisen of Shirenzhang quartz vein type tungsten deposit in Northern Guangdong.In order to explore the existence of radioactive mineralization,some rules are found by systematic study,including that:1)Radioactive elements(U,Th)content in tungsten-quartz veins is relatively low,most of them are lower than the Clark values of crust;2)The average content of granite is 2~10times higher than U-bearing granites in Southern China;3)The content of U and Th in greisen is more higher,and is also in tungsten veins rich in sulfide,accompanied by development of radioactive minerals;4)From the level of 550 mto 340m,radioactive element content presents variational trends from small to big in all kinds of geological body or different veins.5)In the deep of the deposit,tungsten veins rich in sulfide and greisen are the important directions for exploring radioactive mineralization.The research results can provide geological basis for the comprehensive utilization of mineral resources and radiation protection.
Some radioactive minerals such as uraninite,thorium containing uraninite,thorite and thorium occur in the quartz vein,granite and greisen of Shirenzhang quartz vein type tungsten deposit in Northern Guangdong.In order to explore the existence of radioactive mineralization,some rules are found by systematic study,including that:1)Radioactive elements(U,Th)content in tungsten-quartz veins is relatively low,most of them are lower than the Clark values of crust;2)The average content of granite is 2~10times higher than U-bearing granites in Southern China;3)The content of U and Th in greisen is more higher,and is also in tungsten veins rich in sulfide,accompanied by development of radioactive minerals;4)From the level of 550 mto 340m,radioactive element content presents variational trends from small to big in all kinds of geological body or different veins.5)In the deep of the deposit,tungsten veins rich in sulfide and greisen are the important directions for exploring radioactive mineralization.The research results can provide geological basis for the comprehensive utilization of mineral resources and radiation protection.
引文
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[16]李慈俊,韩泽宏.金银矿石中的放射性元素[M].国外铀金地质,1996,13(4):320-326.
[2]朱文凤,杨国高,韦龙明,等.广东石人嶂钨矿床银矿物特征[J].桂林工学院学报,2012,29(3):285-291.
[3]张少琴,朱文凤,韦龙明,等.产铀花岗岩中的晶质铀矿的若干特征——以粤北石人嶂钨矿为例[J].中国矿业,2009,18(11):104-106.
[4]Wei Longming,Zhu Wenfeng,Yang Guogao,et al.Preliminary Research into Uraninite in Shirenzhang Tungsten Deposit,Guangdong,China,The International Symposium on Deep Exploration into the Lithosphere,Scientific Program&Proceedings,Beijing,China,2011:113-116.
[5]韦龙明,王莉,张广辉,等.广东石人嶂钨矿床中的晶质铀矿研究[J].地质学报,2014,88(4):805-813.
[6]陈培荣,华仁民,章邦桐,等.南岭燕山早期后造山花岗岩类:岩石学制约和地球动力学背景[J].中国科学D辑,2002,32(4):279-289.
[7]华仁民.南岭中生代陆壳重熔型花岗岩类成岩一成矿的时间差及其地质意义[J].地质论评,2005,51(6):633-639.
[8]李明君.广东石人嶂钨矿花岗岩类地质特征及与钨矿化关系探讨[D].桂林:桂林理工大学,2013.
[9]付建明,李华芹,屈文俊,等.粤北始兴地区石英脉型钨矿成矿时代的确定及其地质意义[J].大地构造与成矿学,2008,32(1):57-62.
[10]韦龙明,汪劲草,朱文凤,等.广东石人嶂—梅子窝钨矿研究新进展[J].桂林工学院学报,2008,28(2):151-156.
[11]韦龙明,林锦富,李文铅,等.广东梅子窝钨矿“五层楼”叠加现象探讨[J].地质学报,2008,82(7):888-893.
[12]王莉,孔凡乾,韦龙明,等.石人嶂钨矿床云英岩型矿化及其研究意义[J].有色金属(矿山部分),2014,66(4):47-51,57.
[13]张广辉.广东石人嶂钨矿放射性矿物及其矿化研究[D].桂林:桂林理工大学,2014.
[14]冯明月,何德宝.华南富铀花岗岩和产铀花岗岩特征[J].铀矿地质,2012,28(4):199-207.
[15]杜乐天,王文广.华南花岗岩型铀矿找矿新目标——绢英岩化铀矿类型[J].铀矿地质,2009,25(2):85-90.
[16]李慈俊,韩泽宏.金银矿石中的放射性元素[M].国外铀金地质,1996,13(4):320-326.