| 云南金平铜厂斑岩Cu(Mo-Au)矿床含矿石英正长斑岩地球化学特征及成因机制探讨 |
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| 引用本文： | 胥磊落,毕献武,苏文超,齐有强,李亮,陈佑纬,董少花,唐永永.云南金平铜厂斑岩Cu(Mo-Au)矿床含矿石英正长斑岩地球化学特征及成因机制探讨[J].岩石学报,2011,27(10):3109-3122. |
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| 作者姓名： | 胥磊落 毕献武 苏文超 齐有强 李亮 陈佑纬 董少花 唐永永 |
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| 作者单位： | 1. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002;中国科学院研究生院,北京100049
2. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳,550002 |
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| 基金项目： | 本文受中国科学院方向项目 (KZCX2-YW-Q04-01)、国家自然科学基金项目 (40873037)和国家重点基金项目(41130423)联合资助. |
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| 摘 要： | 铜厂斑岩型Cu(Mo-Au)矿床位于金沙江-红河富碱侵入岩带的南段,其含矿的石英正长斑岩侵入体属金沙江-红河富碱侵入岩带的重要组成部分.对铜厂石英正长斑岩开展详细的地球化学研究结果表明,其具有高碱、富钾及准铝质-弱过铝质等特征,属钾玄岩系列岩石；微量和稀土元素分析表明,铜厂石英正长斑岩明显富集Rb、Ba、Th、U、K、La和Sr等大离子亲石元素,相对亏损Nb、Ta和Ti等高场强元素,具有明显的“TNT”负异常,稀土总量高,明显富集轻稀土而亏损重稀土,轻重稀土分馏显著；(87Sr/86Sr)i为0.707097～0.707138,εNd(t)为-7.1 ～ -6.8,在Sr-Nd同位素相关图上,与EMII来源岩石相似.对比金沙江-红河富碱侵入岩带北段的玉龙含矿的二长花岗斑岩和中段的马厂箐含矿的花岗斑岩的地球化学特征,铜厂含矿斑岩具有高的全碱、微量元素和稀土元素含量、高的(87Sr/86Sr)i值和低的εNd(t)值、不具埃达克质岩属性等特征.综合研究表明,铜厂含矿的石英正长斑岩在成因类型上属于A型花岗岩类,形成于～35 Ma的晚碰撞走滑环境且直接起源于EMII地幔的部分熔融铜厂与玉龙及马厂箐斑岩型Cu( Mo-Au)矿床含矿斑岩地球化学特征和成矿规模存在差异,与源区物质的部分熔融程度和地壳物质的混染程度密切相关.
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| 关 键 词： | 石英正长斑岩 地球化学特征 成因机制 铜厂斑岩型Cu (Mo-Au)矿床 |
| 收稿时间： | 5/5/2010 12:00:00 AM |
| 修稿时间： | 2011/8/10 0:00:00 |
Geochemical characteristics and petrogenesis of the quartz syenite porphyry from Tongchang porphyry Cu(Mo-Au) deposit in Jinping County,Yunan Province |
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| XU LeiLuo,BI XianWu,SU WenChao,QI YouQiang,LI Liang,CHEN YouWei,DONG ShaoHua and TANG YongYong.Geochemical characteristics and petrogenesis of the quartz syenite porphyry from Tongchang porphyry Cu(Mo-Au) deposit in Jinping County,Yunan Province[J].Acta Petrologica Sinica,2011,27(10):3109-3122. |
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| Authors: | XU LeiLuo BI XianWu SU WenChao QI YouQiang LI Liang CHEN YouWei DONG ShaoHua and TANG YongYong |
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| Institution: | State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The Tongchang porphyry Cu(Mo-Au) deposit is located in southern segment of the Jinshajiang-Red River alkali-rich intrusive belt.The Tongchang quartz syenite porphyry intrusion is one important member of the Jinshajiang-Red River alkali-rich intrusions.Detailed geochemical study on the Tongchang quartz syenite porphyries indicates that it is characterized by high alkali,metaluminous to weakly peraluminous and enrichment in potassium,and belongs to shoshonitic rock.These rocks are obviously enriched in LILEs(... |
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| Keywords: | Quartz syenite porphyry Geochemical characteristics Petrogenesis Tongchang porphyry Cu(Mo-Au) deposit |
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