Postcollisional calc-alkaline lavas and xenoliths from the southern Qiangtang terrane, central Tibet
文献类型：期刊论文
| 作者 | Ding, Lin; Kapp, Paul; Yue, Yahui; Lai, Qingzhou |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2007-02-15 |
| 卷号 | 254期号:1-2页码:28-38 |
| 关键词 | Tibetan plateau postcollisional volcanism xenoliths intracontinental subduction |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2006.11.019 |
| 文献子类 | Article |
| 英文摘要 | A newly recognized east-west trending province of 43 to 28 Ma volcanic rocks occurs in the southern Qiangtang terrane of central Tibet. The lavas are Na-rich calc-alkaline in composition, relatively primitive, and locally host ultramafic and mafic xenoliths. Foliated mafic granulite xenoliths from similar to 28 Ma lavas equilibrated at temperatures in the range of 980 to 1260 degrees C, indicating that the southern Qiangtang terrane lower crust was deformed and heated to very high temperatures during or before the Oligocene. In the northern Qiangtang terrane is a parallel suite of volcanic rocks of coeval age. However, here, the volcanic rocks are (ultra)potassic in composition and underlain by a hot (T > 800 degrees C) metasedimentary-bearing lower crust. We suggest that both suites of Qiangtang lavas were derived from a primitive mantle source and that the enriched nature of the northern Qiangtang lavas reflects contamination by partial melts of metasedimentary lower crust. This contrasts with the conventional interpretation that Tibetan potassic lavas were solely derived from an ancient, enriched mantle lithospheric source. While removal of lithospheric mantle seems to be required to produce the high temperature melts, Eocene-Oligocene volcanism was coeval with thrust reactivation along bounding suture zones, implying that mantle dynamics were linked to intracontinental subduction. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS关键词 | EAST-WEST EXTENSION ; NORTHERN TIBET ; TECTONIC EVOLUTION ; CRUSTAL XENOLITHS ; VOLCANIC-ROCKS ; PLATEAU ; UPLIFT ; MAGMATISM ; COLLISION ; LHASA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000244595000003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67884]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ding, Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100085, Peoples R China 3.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA |
| 推荐引用方式 GB/T 7714 | Ding, Lin,Kapp, Paul,Yue, Yahui,et al. Postcollisional calc-alkaline lavas and xenoliths from the southern Qiangtang terrane, central Tibet[J]. EARTH AND PLANETARY SCIENCE LETTERS,2007,254(1-2):28-38. |
| APA | Ding, Lin,Kapp, Paul,Yue, Yahui,&Lai, Qingzhou.(2007).Postcollisional calc-alkaline lavas and xenoliths from the southern Qiangtang terrane, central Tibet.EARTH AND PLANETARY SCIENCE LETTERS,254(1-2),28-38. |
| MLA | Ding, Lin,et al."Postcollisional calc-alkaline lavas and xenoliths from the southern Qiangtang terrane, central Tibet".EARTH AND PLANETARY SCIENCE LETTERS 254.1-2(2007):28-38. |
入库方式： OAI收割
来源：地质与地球物理研究所
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