楚雄盆地郝家河砂岩型铜矿床断裂构造岩稀土元素地球化学特征——以Ⅲ号矿体群为例
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摘要
郝家河铜矿床是楚雄盆地砂岩型矿床的典型代表之一。本文以Ⅲ号矿体群为例,在系统研究矿床地质特征的基础上,对不同方向、不同矿化程度的断裂构造岩、矿石、地层岩石进行稀土元素特征对比分析,结果表明:断裂构造岩与矿石、地层岩石表现出轻稀土元素富集,δEu弱亏损,δCe负异常不明显,轻稀土富集的右倾配分模式,显示出构造岩与矿石、地层岩石稀土元素特征具有同源特征;讨论了各类岩矿石稀土元素地球化学特征,分析影响构造岩稀土含量及配分模式的因素,进而提出稀土元素地球化学找矿标志,为隐伏矿预测提供重要的地球化学信息。
Haojiahe Cu deposit is one of the typical sandstone type deposits in Chuxiong basin.In the case study of No.III ore body group,the systematic research on the geological characteristics of the deposit and the REE characteristic comparison among fault tectonites,ores and formation rocks which characterized by different direction and different degree of mineralization reveal that: LREE concentration,weak negative δEu,δCe negative anomaly and the right oblique distribution pattern of LREE concentration are found in fault tectonites,ores and formation rocks.It shows that the REE characteristics of tectonites,ores and formation rocks have the same source.REE geochemical characteristics of various rocks and ores are discussed and factors which affect rare earth content of tectonites and its distribution pattern are also analyzed.REE geochemical clues for prospection are proposed in the paper and it provides important geochemical information for prediction of hidden ores.
Haojiahe Cu deposit is one of the typical sandstone type deposits in Chuxiong basin.In the case study of No.III ore body group,the systematic research on the geological characteristics of the deposit and the REE characteristic comparison among fault tectonites,ores and formation rocks which characterized by different direction and different degree of mineralization reveal that: LREE concentration,weak negative δEu,δCe negative anomaly and the right oblique distribution pattern of LREE concentration are found in fault tectonites,ores and formation rocks.It shows that the REE characteristics of tectonites,ores and formation rocks have the same source.REE geochemical characteristics of various rocks and ores are discussed and factors which affect rare earth content of tectonites and its distribution pattern are also analyzed.REE geochemical clues for prospection are proposed in the paper and it provides important geochemical information for prediction of hidden ores.
引文
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[12]史春鸿,韩润生,吴鹏,等.滇中牟定地区上白垩统马头山组岩石地球化学及物源属性[J].沉积学报,2011,29(2):303-310.
[13]吴海枝,韩润生,吴鹏,等.滇中郝家河砂岩型铜矿床成矿作用过程的流体包裹体证据[J].矿物岩石,2011,31(1):27-35.
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[17]Ran Chongying.Geochemistry of copper,Salt and Organic As-sociated Deposits and Copper Metallization in the Chuxiong Ba-sin,Yunnan,China[J].Journal of Earth Science,2009.
[2]普传杰.牟定郝家河铜矿床的构造控矿特征[J].云南地质,1992,11(2):162-168.
[3]马德云,陶琰,高振敏,等.旧锡矿区构造岩稀土元素特征及其找矿意义[J].地质与勘探,2003,36(6):37-38.
[4]刘远栋,庞保成,付伟,等.桂西北世加金矿稀土元素特征及其成矿指示意义[J].矿产与地质,2011,25(4):317-323.
[5]韩润生,刘丛强,黄智龙,等.云南会泽铅锌矿构造控矿特征及断裂构造岩稀土元素组成特征[J].矿物岩石,2000,20(4):12-18.
[6]刘昌辉,罗荣生.砂岩铜矿地质[M].北京:冶金工业出版社,1977,117-137,227-224.
[7]涂光炽,等.中国层控矿床地球化学(第一卷)[M].北京:科学出版社,1984.
[8]冉崇英,庄汉平.楚雄盆地铜、盐、有机质矿床组合地球化学[M].北京:科学出版社,1998,10-84.
[9]Ran Chongying.Geochemistry of copper,Salt and Organic Asso-ciated Deposits and Copper Metallization in the Chuxiong Basin,Yunnan,China[J].Journal of Earth Science,2009.
[10]郭远生,罗荣生.滇中砂岩铜矿地质[M].昆明:云南科技出版社,2008,62-150.
[11]谭凯旋.砂岩铜矿地球化学和成矿动力学[M].北京:地震出版社,1998.
[12]史春鸿,韩润生,吴鹏,等.滇中牟定地区上白垩统马头山组岩石地球化学及物源属性[J].沉积学报,2011,29(2):303-310.
[13]吴海枝,韩润生,吴鹏,等.滇中郝家河砂岩型铜矿床成矿作用过程的流体包裹体证据[J].矿物岩石,2011,31(1):27-35.
[14]孙岩,韩克从.构造动力学变质岩带[M].北京:科学出版社,1994.
[15]赵江南,陈守余,赵鹏大.个旧高松矿田断裂带构造岩稀土元素地球化学特征及意义[J].中国稀土,2011,29(2):224-232.
[16]赵振华.铕地球化学特征的控制因素[J].南京大学学报(地球科学),1993,15(3):271.
[17]Ran Chongying.Geochemistry of copper,Salt and Organic As-sociated Deposits and Copper Metallization in the Chuxiong Ba-sin,Yunnan,China[J].Journal of Earth Science,2009.