|
|||||
|
|
| 青藏高原北羌塘新生代高钾钙碱岩系火山岩角闪石类型有痕量元素地球化学 | |
| 引用本文： | 赖绍聪,伊海生,等.青藏高原北羌塘新生代高钾钙碱岩系火山岩角闪石类型有痕量元素地球化学[J].岩石学报,2002,18(1):17-24. |
| 作者姓名： | 赖绍聪 伊海生 |
| 作者单位： | 1. 西北大学大陆动力学教育部重点实验室,西北大学地质学系,西安,710069 2. 成都理工学院,成都,610059 3. Macquarie大学GEMOC国家重点实验室,悉尼,2109,澳大利亚 |
| 基金项目： | 国家自然科学基金(批准号:40072029)，国土资源部I46C002001(乌兰乌拉湖)1:25万区域地质调查项目(批准号:2001300009281)，澳大利亚GEMOC国家重点实验室资助 |
| 摘 要： | 利用电子探针和激光探针剥蚀系统（LA－ICP－MS）对北羌塘新第三纪高钾钙碱岩系英安岩中角闪石的主元素和微量、角闪石强烈富集Sc、Ti、V、Cr、Co、Ni等不相容亲铁元素，而相对亏损Th、U、Pb、Rb等强不相容的大离子亲石元素。稀土元素丰度高，且无Eu异常，批示北羌塘这套高钾钙碱岩系火山岩可能是青藏高原加厚的相当于榴辉岩相物质组成的下部陆壳脱水熔融的产物。 |
| 关 键 词： | 角闪石 主元素有痕量元素 地球化学 新生代火山岩 北羌塘 |
| 修稿时间： | 2001年4月28日 |
Trace element geochemistry and classification of amphiboles of the Cenozoic high-potassium calc-alkaline volcanic rock series from north Qiangtang, Qinghai-Tibetan plateau. |
|
| Suzanne Y O'REILLYLAI ShaoCong,YI HaiSheng,LIU ChiYang and Suzanne Y O'REILLY.Trace element geochemistry and classification of amphiboles of the Cenozoic high-potassium calc-alkaline volcanic rock series from north Qiangtang, Qinghai-Tibetan plateau.[J].Acta Petrologica Sinica,2002,18(1):17-24. | |
| Authors: | Suzanne Y O'REILLYLAI ShaoCong YI HaiSheng LIU ChiYang and Suzanne Y O'REILLY |
| Institution: | Suzanne Y O'REILLYLAI ShaoCong,YI HaiSheng,LIU ChiYang and Suzanne Y O'REILLY.The Key Laboratory of Cechnology Dynamics Ministry of Education:Department of Geology Northuest University Xi an .Chengdu University of Technology,Chengdu,China. National Key Centre of GEMOC,Macquarie University,Sydney,Australia |
| Abstract: | Based on the electron microprobe and laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) analyses, the major and trace element features of amphibole from the Cenozoic high-potassium calc-alkaline dacite of north Qiangtang are discussed in this paper. The result indicates that all of the amphiboles belong to calcic series. Their major elements imply that the dacite should be of crustal origin. And the amphiboles show the Sc, Ti, V, Cr, Co, Ni enrichment and the Th, U, Pb, Rb depletion. Especially, the amphiboles exhibit high content in rare earth element but no remarkable Eu depletion. It may imply that the Cenozoic high-potassium calc-alkaline volcanic rocks from north Qiangtang might be originated from the thickened eclogitic deep crust of Tibetan plateau by dehydration partial melting. |
| Keywords: | Amphibole Major and trace element Geochemistry North Qiangtang Qinghai-Tibetan plateau |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《岩石学报》浏览原始摘要信息 | |
| 点击此处可从《岩石学报》下载免费的PDF全文 | |