| 青海省俄昌公仁地区尕笛考组火山岩地球化学特征及构造环境 |
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| 引用本文： | 王光辉,加永泽巴,邹建,宋福生.青海省俄昌公仁地区尕笛考组火山岩地球化学特征及构造环境[J].地质找矿论丛,2018,33(3):417-424. |
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| 作者姓名： | 王光辉 加永泽巴 邹建 宋福生 |
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| 作者单位： | 四川省核工业地质调查院;西藏大学工学院 |
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| 基金项目： | 中国地质调查局"青海省治多县俄昌公仁地区1∶5万I46E012020、I46E013020、I46E014020三幅区域地质矿产调查项目"（编号：12120113033500）资助。 |
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| 摘 要： | 俄昌公仁地区地处西金乌兰—金沙江构造混杂岩带与北羌塘—昌都地体的交汇部位。文章通过对乌丽—开心岭尕笛考组火山岩岩石学、主量元素、稀土元素、微量元素等地质地球化学研究表明:尕笛考组火山岩为典型的钙碱性岩石组合,推断尕笛考组火山岩属于与板块俯冲作用有关的岩浆岛弧带的产物,形成于与板块俯冲作用有关的岛弧构造环境;锆石U-Pb同位素年代为258.5 Ma±4.6 Ma,属晚二叠世早期。
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| 关 键 词： | 尕笛考组 二叠纪火山岩 地球化学特征 构造环境 俄昌公仁地区 青海省 |
| 收稿时间： | 2017/4/17 0:00:00 |
Geochemical characteristics and tectonic environment of the volcanic rocks from Gadikao Formation in Echanggongrenarea, Qinghai Province, China |
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| WANG Guanghui,JIA Yongzeb,ZOU Jian and SONG Fusheng.Geochemical characteristics and tectonic environment of the volcanic rocks from Gadikao Formation in Echanggongrenarea, Qinghai Province, China[J].Contributions to Geology and Mineral Resources Research,2018,33(3):417-424. |
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| Authors: | WANG Guanghui JIA Yongzeb ZOU Jian and SONG Fusheng |
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| Institution: | Sichuan Institute of Nuclear Geology, Chengdu 610052, China,College of Engineering Tibet University, Lhasa 850000 Tibet, China,Sichuan Institute of Nuclear Geology, Chengdu 610052, China and Sichuan Institute of Nuclear Geology, Chengdu 610052, China |
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| Abstract: | The Echanggongren area is situated at the intersection position of Xijinwulan-Jinshajiang river melange belt and the north Qiangtan-Changdu Terrian. Study on petrology, major element, REE and trace element geochemistry of volcanic rocks of Gadikao Formation show that the volcanic rock belongs to the typical calc-alkali rock series and is deduced to be the product of the plate subduction-related magmatic island arc. The zircon U-Pb age of 258.5 Ma±4.6 Ma belongs to Late Permian Period. |
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| Keywords: | Gadikao Formation Permian vocanic rocks Geochemistry tectonic setting Echanggongren Prefecture Qinghai province |
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