若尔盖地区510-1铀矿床脉石矿物微量元素垂向分带特征
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摘要
510-1铀矿床是若尔盖地区极具代表性的碳硅泥岩型铀矿床之一,笔者从其热液作用产物(铀矿石及脉石矿物)入手,分不同中段详细研究了该矿床的脉石矿物微量元素垂向分带特征。结果表明:成矿期方解石脉的U、Sb平均含量在5中段有一明显的低谷值;各种稀土元素及∑REE平均含量在第5中段附近有一明显的拐点;δCe与δEu值在第5中段附近也有显著变化。这反映出第5中段存在一个地球化学界面,使成矿流体的氧化还原环境发生了突变。
Uranium deposit 510-1is one of the typical carbonaceous-siliceous-arillaceoius rock type deposit in Zoige.By studying the vertical zoning characteristics of trace element in gangue mineral from different levels,the authers found that average content of U,Sb in calcite veins of metallogenic period shew a obvious lower value nearby level 5,and the average content of∑REE in calcite veins shew a obvious change nearby level 5.The significant changes ofδCe andδEu in calcite veins also occurred nearby the level 5.These two feature nearby level 5of uranium deposit 510-1indicates that there was a geochemical interface which cause the abrupt change for the oxidative-reductive condition of metallogenic fluid.
Uranium deposit 510-1is one of the typical carbonaceous-siliceous-arillaceoius rock type deposit in Zoige.By studying the vertical zoning characteristics of trace element in gangue mineral from different levels,the authers found that average content of U,Sb in calcite veins of metallogenic period shew a obvious lower value nearby level 5,and the average content of∑REE in calcite veins shew a obvious change nearby level 5.The significant changes ofδCe andδEu in calcite veins also occurred nearby the level 5.These two feature nearby level 5of uranium deposit 510-1indicates that there was a geochemical interface which cause the abrupt change for the oxidative-reductive condition of metallogenic fluid.
引文
[1]陈友良.西南地区铀资源现状与找矿前景展望[J].铀矿地质,2004,20(1):1-3.
[2]金有忠,李庆阳,刘建华,等.若尔盖铀矿田成矿条件与发展远景浅析[J].西南铀矿地质,2005,11(1):11-25.
[3]金景福,倪师军,胡瑞忠.302铀矿床热液脉体的垂直分带及其成因探讨[J].矿床地质,1992,11(3):252-258.
[4]倪师军,胡瑞忠,金景福.302铀矿床热液的混合和沸腾垂直分带模式[J].铀矿地质,1994,10(2):70-77.
[5]杜乐天.迎接铀矿找矿新高潮——华南二轮找矿势在必行[J].铀矿地质,2005,21(3):146-151.
[6]叶永钦.若尔盖铀矿田510-1铀矿床垂直分带特征研究[D].成都:成都理工大学硕士学位论文,2014.
[7]陈友良.若尔盖地区碳硅泥岩型铀矿床成矿流体成因和成矿模式研究[D].成都:成都理工大学博士学位论文,2008.
[8]张成江,陈友良.510-1铀矿床垂直分带规律的发现及其成因意义[J].地质与勘探,2010,46(3):434-441.
[9]陈友良,侯明才,朱西养,等.若尔盖铀矿田含矿岩系的岩石特征及成因探讨[J].成都理工大学学报(自然科学版),2007,34(5):553-558.
[10]Chen Youliang,Ye Yongqin,Song Hao,Chang Dan.Vertical Zoning Characteristics of Trace Element in Zoige 510-1 Uranium Deposit,Sichuan Province,China[J].Acta Geologica Sinica(English Edition),2013,87(S1):679-681.
[11]陈友良,常丹,叶永钦,宋昊,魏佳.若尔盖510-1铀矿床微量元素垂直分带特征研究[J].矿物学报,2013,33(S2):196-197.
[12]涂光炽.低温地球化学[M].北京:科学出版社,1998.
[13]赵振华.微量元素地球化学原理[M].北京:科学出版社,1997.
[14]Rollison H R.Using geochemical data:evaluation,presentation,interpretation[M].New York:Longman Scientific&Technical Limited,1993.
[2]金有忠,李庆阳,刘建华,等.若尔盖铀矿田成矿条件与发展远景浅析[J].西南铀矿地质,2005,11(1):11-25.
[3]金景福,倪师军,胡瑞忠.302铀矿床热液脉体的垂直分带及其成因探讨[J].矿床地质,1992,11(3):252-258.
[4]倪师军,胡瑞忠,金景福.302铀矿床热液的混合和沸腾垂直分带模式[J].铀矿地质,1994,10(2):70-77.
[5]杜乐天.迎接铀矿找矿新高潮——华南二轮找矿势在必行[J].铀矿地质,2005,21(3):146-151.
[6]叶永钦.若尔盖铀矿田510-1铀矿床垂直分带特征研究[D].成都:成都理工大学硕士学位论文,2014.
[7]陈友良.若尔盖地区碳硅泥岩型铀矿床成矿流体成因和成矿模式研究[D].成都:成都理工大学博士学位论文,2008.
[8]张成江,陈友良.510-1铀矿床垂直分带规律的发现及其成因意义[J].地质与勘探,2010,46(3):434-441.
[9]陈友良,侯明才,朱西养,等.若尔盖铀矿田含矿岩系的岩石特征及成因探讨[J].成都理工大学学报(自然科学版),2007,34(5):553-558.
[10]Chen Youliang,Ye Yongqin,Song Hao,Chang Dan.Vertical Zoning Characteristics of Trace Element in Zoige 510-1 Uranium Deposit,Sichuan Province,China[J].Acta Geologica Sinica(English Edition),2013,87(S1):679-681.
[11]陈友良,常丹,叶永钦,宋昊,魏佳.若尔盖510-1铀矿床微量元素垂直分带特征研究[J].矿物学报,2013,33(S2):196-197.
[12]涂光炽.低温地球化学[M].北京:科学出版社,1998.
[13]赵振华.微量元素地球化学原理[M].北京:科学出版社,1997.
[14]Rollison H R.Using geochemical data:evaluation,presentation,interpretation[M].New York:Longman Scientific&Technical Limited,1993.