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地质科学  2008, Vol. 43 Issue (4): 685-694    DOI:
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湘西北下光荣矿区铅锌矿床主要地球化学特征
匡文龙1, 刘新华1, 陈年生2, 余沛然2, 陈新跃1
1. 湖南科技大学土木工程学院 湖南 湘潭 411201;
2. 湖南省地质矿产勘查开发局405队 湖南 吉首 416007
Main geochemical characteristics of lead-zinc deposits in Xiaguangrong ore district,northwestern Hunan
Kuang Wenlong1, Liu Xinhua1, Chen Niansheng2, Yu Peiran2, Chen Xinyue1
1. School of Civil Engineering, Hunan Science and Technology University, Xiangtan, Hunan 411201;
2. No. 405 Team, Bureau of Mineral Resources and Geological Exploration of Hunan Province, Jishou, Hunan 416007
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摘要 湘西北洛塔矿田下光荣矿区中的铅锌矿床主要赋存于下奥陶统的南津关组、分乡组及红花园组中,层控特征明显。矿床地球化学特征分析表明矿质主要来自造山带,硫质主要来源于同沉积的海水硫酸盐。大气降水等组成的含矿热卤水在地下流动的过程中,不断萃取地层中的金属成份,并在温度降低的同时,沉淀富集金属物质成份,有用组份主要以氯的络合物方式进行搬运,主成矿期的成矿温度为108~197℃,矿床成因类型属层控型低温热液矿床。加里东期和燕山期的改造则决定了矿床的现今分布格局和矿体的赋存状态及产状。
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匡文龙
刘新华
陈年生
余沛然
陈新跃
关键词矿床地球化学   层控铅锌矿床   后期改造   下光荣矿区   湘西北     
Abstract: The lead-zinc deposits in Xiaguangrong ore district of Luota Ore Field,northwestern Hunan,occurred in the Nanjinguan,Fengxiang and Honghuayuan Formations in age of Early Ordovician,with an obvious feature of stratabound ore deposit.Based on field survey and measurements of Pb,O and S isotopes,the ore-bearing formation and later reformation were discussd in the paper.The geochemical characteristics of the lead-zinc deposits revealed that the metal originated from intracontinent collision orogen,and the sulphide substance sourced from syndeposited seawater sulphates mainly.The mineralization was formed by the circulation of hot brine,which came from meteoric water and absorded the metal substance from the surrounding strata in its flowing process.The main mineralization constituent was transited in a form of chlorine complex;and the temperature in main mineralization period was 108~197℃.The genetic type of the lead-zinc deposit was strata-bound ore deposit with low temperature and hot fluid in this area.The reformation in the Caledonian and Yanshanian played an important role in distributional framework of ore deposits and the shapes and occurrences of ore bodies.
Key wordsGeochemical characteristics of deposit   Stratabound lead-zinc ore deposit   Later reformation   Xiaguangrong ore district   Northwestern Hunan   
收稿日期: 2007-10-08;
基金资助:湖南省自然科学基金资助项目(编号:06JJ50075)和中国地质调查局项目(编号:200110200022)的部分成果.
引用本文:   
匡文龙,刘新华,陈年生等. 2008, 湘西北下光荣矿区铅锌矿床主要地球化学特征. 地质科学, 43(4): 685-694.
Kuang Wenlong,Liu Xinhua,Chen Niansheng et al. Main geochemical characteristics of lead-zinc deposits in Xiaguangrong ore district,northwestern Hunan[J]. Chinese Journal of Geology, 2008, 43(4): 685-694.
 
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