|
|||||
|
|
| 阿尔金山中奥陶世恰什坎萨依侵入岩确定及对阿尔金洋盆闭合时间限定 | |
| 引用本文： | 李卫东,张冀,朱志新,倪新元,赵同阳.阿尔金山中奥陶世恰什坎萨依侵入岩确定及对阿尔金洋盆闭合时间限定[J].新疆地质,2012,30(2):141-145. |
| 作者姓名： | 李卫东 张冀 朱志新 倪新元 赵同阳 |
| 作者单位： | 1. 中国地质大学,北京 100083;新疆维吾尔自治区地质勘查基金项目管理中心,新疆 乌鲁木齐 830002 2. 新疆维吾尔自治区国土资源厅,新疆 乌鲁木齐,830002 3. 新疆维吾尔自治区地质调查院,新疆 乌鲁木齐,830011 4. 中国地质大学,北京 100083;新疆维吾尔自治区地质调查院,新疆 乌鲁木齐 830011 |
| 摘 要： | 恰什坎萨依侵入岩是阿尔金山北部重要碱性系列富铝正长花岗岩,前人认为是前寒武纪侵入岩。对其锆石进行SHRIMP定年,获得侵入岩形成年龄(461.7±12.7)Ma,岩石化学具富铝高钾特征,为板块对接、碰撞并伴随地壳缩短、加厚使陆壳重熔形成的同碰撞花岗岩。结合区域构造演化资料,认为该岩体年代学及地球化学特征限定阿尔金早古生代洋盆闭合时间为中晚奥陶世。 |
| 关 键 词： | 阿尔金 恰什坎萨依 正长花岗岩 SHRIMP 洋盆闭合时间 |
The Age Determination of the Middle Ordovician Qiashikansayi Intrusions in Altyn Mountains and its Constraints on the Closure of Altyn Oceanic |
|
| LI Wei-dong , ZHANG Ji , ZHU Zhi-xin , NI Xin-yuan , ZHAO Tong-yang.The Age Determination of the Middle Ordovician Qiashikansayi Intrusions in Altyn Mountains and its Constraints on the Closure of Altyn Oceanic[J].Xinjiang Geology,2012,30(2):141-145. | |
| Authors: | LI Wei-dong ZHANG Ji ZHU Zhi-xin NI Xin-yuan ZHAO Tong-yang |
| Institution: | 1.China University of Geosciences,Beijing,100083;2.Autonomous Project Management Center of Geological Prospecting Fund,Urumqi,Xinjiang,830002,China;3.Xinjiang Bureau of Land and Mineral Resource,Urumqi,Xinjiang,830002,China;4.Xinjiang Academe of Geological Surveys,Urumqi,Xinjiang,830011,China) |
| Abstract: | The study area is located in northern of Altyn mountains,the age of the moyite that this paper study had been previously classified into Precambrian intrusions.The author used Zircon SHRIMP U-Pb dating for it and yielded an age of 461.7±12.7Ma.The petrochemistry characteristics of the rock is high Al,K and be consider as collision granite.United regional geological characteristics,advanced the close date of Altyn early Paleozoic Oceanic Basin is middle Ordovician. |
| Keywords: | Altyn Qiashikansayi Moyite SHRIMP Oceanic Basin Closure |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |