高昔铀矿床地质特征及碱交代对铀成矿的影响
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摘要
高昔铀矿床位于湘、赣交界处,属于鹿井矿田其中的矿床之一,是一个典型的受碱交代作用影响较为强烈的碎裂蚀变花岗岩型铀矿床。其蚀变主要有:碱交代、绿泥石化、萤石化、赤铁矿化、黄铁矿化、硅化等。整个矿体受构造控制,主要位于硅化角砾岩带F_1,F_5,F_6之间,其碱交代岩一般就是矿石。矿区内发育有大量的断裂构造,其中NE向的QF_Ⅱ,QF_Ⅲ两条大的构造控制了整个矿床,是主要的控矿、导矿构造。通过电子探针的晶质铀矿定年发现其赋矿围岩的成矿年龄为201.8~222.9 Ma。
Gaoxi ore deposit lies in the junction of Hunan and Jiangxi,which belongs to Lujing ore field. It's a typical uranium ore deposit of cataclastic-altered granite type which is heavily affected by alkaline metasomatism.The wall rock alteration primarily contains alkaline metasomatism,chloritization,silicification,fluoritization,pyritization,hematitization,etc. The ore body all controled by ore-controlling,locates between the silicified breccia zone F_1,F_5 and F_6,and the alkaline metasomatic rock is generally ore. A great amount of fracture structures have been developed within the ore field,among which the two big structures,QF_Ⅱand QF_Ⅲ along NE,control the whole ore deposit,and they are the main ore-controlling and ore-transmitting structure. The result of uraninite and the age is 201. 8 ~ 222. 9 Ma confirmed through electronic probe dating.
Gaoxi ore deposit lies in the junction of Hunan and Jiangxi,which belongs to Lujing ore field. It's a typical uranium ore deposit of cataclastic-altered granite type which is heavily affected by alkaline metasomatism.The wall rock alteration primarily contains alkaline metasomatism,chloritization,silicification,fluoritization,pyritization,hematitization,etc. The ore body all controled by ore-controlling,locates between the silicified breccia zone F_1,F_5 and F_6,and the alkaline metasomatic rock is generally ore. A great amount of fracture structures have been developed within the ore field,among which the two big structures,QF_Ⅱand QF_Ⅲ along NE,control the whole ore deposit,and they are the main ore-controlling and ore-transmitting structure. The result of uraninite and the age is 201. 8 ~ 222. 9 Ma confirmed through electronic probe dating.
引文
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张振华.1999.鹿井矿田空间定位条件分析[J].铀矿地质,15(6):338-343.
杜乐天.2002碱交代岩研究的重大成因意义[J].矿床地质,增刊:953-958.
韩娟.2011.江西黄蜂岭铀矿床花岗岩时代、成因:锆石U-Pb年龄和Hf同位素证据[J].地质与勘探,47(2):284-293.
罗毅,王明太,李建红,等.2002.诸广铀矿集区成矿地质特征及成矿模式[J].中国核科技报告:452-467.
邵飞.2010.鹿井矿田铀成矿地质特征及找矿潜力分析[J].铀矿地质,26(5):295-300.
覃金宁,刘红兵,何春明,等.2003.湖南鹿井铀矿田黄高地区成矿断裂构造地球化学特征及找矿意义[J].华东地质学院学报,26(3):254-258.
韦龙明,王莉,张广辉,等.2014.广东石人嶂钨矿床中的晶质铀矿研究[J].地质学报,88(4):805-813.
吴俊奇,闵茂中,翟建平,等.1998.华南诸广山复式岩体中段花岗岩的碱交代蚀变[J].岩石学报,14(1):90-98.
曾庆燚.2012.高昔(326)铀矿床成矿特征的认识[J].中国矿业,21(增刊):460-464.
张爱.2009.诸广南部铀矿区碱交代岩特征及同位素年代学研究[J].东华理工大学学报:自然科学版,32(3):209-212.
张成江.1990.贵东岩体花岗岩中晶质铀矿的特征及找矿意义[J].成都地质学院学报,17(3):10-17.
张振华.1999.鹿井矿田空间定位条件分析[J].铀矿地质,15(6):338-343.