| 西藏班戈地区雪如岩体的形成环境及成矿意义 |
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| 引用本文： | 高顺宝,郑有业,谢名臣,张众,闫学欣,武斌,罗俊杰.西藏班戈地区雪如岩体的形成环境及成矿意义[J].地球科学,2011,36(4):729-739. |
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| 作者姓名： | 高顺宝 郑有业 谢名臣 张众 闫学欣 武斌 罗俊杰 |
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| 作者单位： | 1.中国地质大学资源学院，湖北武汉 430074 |
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| 基金项目： | 青藏高原矿产调查评价专项项目(No.1212010818038) |
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| 摘 要： | 雪如岩体主要由中细粒二长花岗岩、中粗粒斑状二长花岗岩组成，在其与郎山组灰岩接触带附近发育有大量的矽卡岩型铜铁矿床或矿化点.岩石及锆石LA-ICP-MS U-Pb、XRF、ICP-AES等分析显示，雪如岩体富K2O、SiO2、LREE及Rb、Ba、Pb、Th等大离子亲石元素，而Nb、Ta、Sr、Ti等高场强元素含量相对较低，稀土元素配分曲线为明显的右倾曲线，具有中等的负Eu异常，属高钾钙碱性-钾玄岩岩石系列和后碰撞花岗岩类，成岩时代分别为79.25±0.97 Ma和79.72±0.51 Ma，形成于早白垩世末-晚白垩世初班公湖-怒江缝合带闭合后、羌塘地体与拉萨地体的后碰撞阶段.综合认为，雪如岩体岩浆源区为下地壳富含流体的石榴石角闪岩相-斜长角闪岩相的镁铁质岩石，是在后碰撞环境下经部分熔融形成的花岗岩类，对班戈地区铜铁多金属成矿非常有利；矽卡岩型铜铁成矿作用发生于80 Ma左右，该认识为区域找矿指明了方向.
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| 关 键 词： | 岩石学 地球化学 成矿作用 |
| 收稿时间： | 2010-05-12 |
Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge,Tibet |
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| GAO Shun-bao,ZHENG You-ye,XIE Ming-chen,ZHANG Zhong,YAN Xue-xin,WU Bin,LUO Jun-jie.Faculty of Earth Resources,China University of Geosciences,Wuhan ,China.State Key Laboratory of Geological Processes , Mineral Resources,China.Geological Team of Northeast Hubei,Xiaogan ,China.No. Team of Geo-exploration Institute,Guangdong Provincial Nuclear Industry Geology Bureau,Heyuan ,China.Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge,Tibet[J].Earth Science-Journal of China University of Geosciences,2011,36(4):729-739. |
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| Authors: | GAO Shun-bao ZHENG You-ye XIE Ming-chen ZHANG Zhong YAN Xue-xin WU Bin LUO Jun-jieFaculty of Earth Resources China University of Geosciences Wuhan ChinaState Key Laboratory of Geological Processes Mineral Resources ChinaGeological Team of Northeast Hubei Xiaogan ChinaNo Team of Geo-exploration Institute Guangdong Provincial Nuclear Industry Geology Bureau Heyuan China |
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| Institution: | GAO Shun-bao1,ZHENG You-ye1,2,XIE Ming-chen3,ZHANG Zhong1,YAN Xue-xin4,WU Bin1,LUO Jun-jie11.Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China2.State Key Laboratory of Geological Processes and Mineral Resources,China3.Geological Team of Northeast Hubei,Xiaogan 432100,China4.No.292 Team of Geo-exploration Institute,Guangdong Provincial Nuclear Industry Geology Bureau,Heyuan 517001,China |
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| Abstract: | The Xueru intrusion is chiefly composed of medium-fine-grained monzogranite and medium-coarse-grained porphyritic monzogranite.There are a large number of skarn iron and copper deposits around the contact zone with the Langshan Formation limestone.The rock and zircon LA-ICP-MS U-Pb,XRF,ICP-AES and other analysis show that the monzogranite is enriched in K2O,SiO2,LREE and Rb,Ba,Pb,Th and other large ion lithophile elements;high field strength elements such as Nb,Ta,Sr,Ti are relatively poor;REE distribution ... |
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| Keywords: | petrology geochemistry mineralization |
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