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| 新疆东天山哈密五堡地区中奥陶世大柳沟组火山岩岩石学和地球化学特征 | |
| 引用本文： | 田纹全,王璞珺,李嵩龄,孙晓猛,温暖,刘新.新疆东天山哈密五堡地区中奥陶世大柳沟组火山岩岩石学和地球化学特征[J].吉林大学学报(地球科学版),2005,35(3):296-301,307. |
| 作者姓名： | 田纹全 王璞珺 李嵩龄 孙晓猛 温暖 刘新 |
| 作者单位： | 1. 吉林大学,地球科学学院,吉林,长春,130061;新疆地质矿产勘探开发局,第一区域地质调查大队,新疆,乌鲁木齐,830011 2. 吉林大学,地球科学学院,吉林,长春,130061 3. 新疆地质矿产勘探开发局,第一区域地质调查大队,新疆,乌鲁木齐,830011 4. 吉林大学,应用技术学院,吉林,长春,130022 |
| 基金项目： | 国土资源部国土资源大调查项目 , 教育部留学回国人员科研启动基金 |
| 摘 要： | 新疆东天山哈密五堡地区中奥陶世大柳沟组是研究区出露的最老的火山岩地层,大地构造属于准噶尔板块-大南湖复合岛弧火山岩带.大柳沟组火山岩以钙碱性系列为主,大离子亲石元素(LIL)的Ba、Th等富集,呈现正异常;高场强元素(HFS)Nb、Ta、Zr、Hf和Ti呈负异常.中基性火山岩的稀土配分曲线为轻稀土富集、重稀土亏损型式.其常量和微量元素特征总体上具岛弧火山岩的特点. |
| 关 键 词： | 中奥陶世 火山岩 地球化学 新疆 东天山 新疆东天山 哈密五堡 地区 中奥陶世 中基性火山岩 岩石学 地球 化学特征 Eastern Tianshan Area Group Volcanic Rocks Middle Ordovician Geochemistry Petrography 微量元素特征 常量 亏损 重稀土 轻稀土 |
| 文章编号： | 1671-5888(2005)03-0296-06 |
Petrography and Geochemistry of the Middle Ordovician Volcanic Rocks of Daliugou Group in Hami Wupu Area of Eastern Tianshan, Xinjiang |
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| TIAN Wen-quan,WANG Pu-Jun,LI Song-ling,SUN Xiao-meng,Wen Nuan,LIU Xin.Petrography and Geochemistry of the Middle Ordovician Volcanic Rocks of Daliugou Group in Hami Wupu Area of Eastern Tianshan, Xinjiang[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(3):296-301,307. | |
| Authors: | TIAN Wen-quan WANG Pu-Jun LI Song-ling SUN Xiao-meng Wen Nuan LIU Xin |
| Abstract: | The middle Ordovician volcanic rocks of the Daliugou Group in the Hami-Wupu area of the Eastern Tianshan seem to be the oldest strata of the studied area. Its tectonic setting belongs to the Dananhu composite island arc volcanic belt of the Junggar plate. Here the volcanic rocks of the Daliugou Group belong predominantly to calc-alkaline series and are featured by the enrichment and positive anomalies of Ba and Th of the large-ion lithophile element(LIL ) group and by negative anomalies of Nb, Ta, Zr, Hf and Ti of the high strenghth field elements (HFS). LREE is enriched while HREE is depleted in the intermediate-basic volcanic rocks. The study of the trace and rare earth elements indicates that the volcanic rocks belong to an island-arc environment in general. |
| Keywords: | middle Ordovician volcanic rock geochemistry Xinjiang Eastern Tianshan |
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