开鲁坳陷钱家店铀矿床铀的赋存状态及铀矿形成时代研究  

Research on existing state of uranium and uranium ore-formation age at Qianjiadian uranium deposit in Kailu depression

作　　者：张明瑜[1] 郑纪伟[1] 田时丰[1] 夏毓亮[2] 刘汉彬[2] 

机构地区：[1]辽河石油勘探局通辽铀矿,辽宁盘锦124010 [2]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2005年第4期213-218,共6页Uranium Geology

摘　　要：本文对开鲁坳陷钱家店铀矿床铀的存在形式及铀矿成矿作用进行了研究。钱家店铀矿床矿石中铀的存在形式有铀矿物、吸附铀及含铀矿物,其中以铀矿物和吸附铀形式为主。U6+/U4+比值为0.266～1.116,平均为0.761。铀矿石中铀在各种粒级碎屑中均有分布,但集中分布在0.1～0.25mm粒级中,铀分布率27.89%～76.98%,平均为46.55%。钱家店砂岩型铀矿床UPb等时线年龄为53±3Ma和7±0Ma。The existing state of uranium and the uranium ore-formation process of Qianjiadian uranium deposit have been studied.The uranium existing state in ores of Qianjiadian uranium deposit includes uranium mineral,the adsorbed uranium and U-containing mineral.Of them,the uranium mineral and adsorbed uarnium are main forms of uranium existence. The U^6+/U^4+ ratio ranges from 0.266 to 1.116 with the average value of 0.761. Uranium may be distributed in all grain size fractions,but it is concentrated in the fraction of 0.1～0.25 mm,accounting for 27.89%～76.98%(in average 46.55%) of the total uranium in ore.The U-Pb isochron ages of uranium ore-formation have been obtained as 53±3 Ma and 7±0 Ma.

关 键 词：钱家店铀矿床 铀的赋存状态 铀矿形成时代 U-Pb等时线 

分 类 号：P619[天文地球—矿床学]