| 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 |
| 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 |
| Geochemical characteristics and tectonic environment of the volcanic rocks from Gadikao Formation in Echanggongrenarea, Qinghai Province, China |
| 投稿时间：2017-04-17 |
| DOI：10.6053/j.issn.1001-1412.2018.03.012 |
| 中文关键词: 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 |
| 英文关键词:Gadikao Formation Permian vocanic rocks Geochemistry tectonic setting Echanggongren Prefecture Qinghai province |
| 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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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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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