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Adakites from continental collision zones: Melting of thickened lower crust beneath southern Tibet
文献类型：期刊论文
| 作者 | Chung, SL; Liu, DY; Ji, JQ; Chu, MF; Lee, HY; Wen, DJ; Lo, CH; Lee, TY; Qian, Q; Zhang, Q |
| 刊名 | GEOLOGY
 |
| 出版日期 | 2003-11-01 |
| 卷号 | 31期号:11页码:1021-1024 |
| 关键词 | adakite Tibet continental collision lower-crustal melting |
| ISSN号 | 0091-7613 |
| 文献子类 | Article |
| 英文摘要 | Adakites are geochemically distinct intermediate to felsic lavas found exclusively in subduction zones. Here we report the first example of such magmas from southern Tibet in an active continental collision environment. The Tibetan adakites were emplaced from ca. 26 to 10 Ma, and their overall geochemical characteristics suggest an origin by melting of eclogites and/or garnet amphibolites in the lower part ( similar to50 km) of thickened Tibetan crust. This lower-crustal melting required a significantly elevated geotherm, which we attribute to removal of the tectonically thickened lithospheric mantle in late Oligocene time. The identification of collisiontype adakites from southern Tibet lends new constraints to not only the Himalayan-Tibetan orogenesis-how and when the Indian lithosphere started underthrusting Asia can be depicted-but also the growth of the early continental crust on Earth that consists dominantly of the tonal ite-trondhjemite-granodiorite suites marked by adalkitic geochemical affinities. |
| WOS关键词 | PLATEAU ; DELAMINATION ; UPLIFT ; EVOLUTION ; MAGMAS ; AMPHIBOLITE ; LITHOSPHERE ; CONSTRAINTS ; SUBDUCTION ; VOLCANISM |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000186411100024 |
| 出版者 | GEOLOGICAL SOC AMERICA, INC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78277]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chung, SL |
| 作者单位 | 1.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan 2.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China 3.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China 4.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan 5.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan 6.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chung, SL,Liu, DY,Ji, JQ,et al. Adakites from continental collision zones: Melting of thickened lower crust beneath southern Tibet[J]. GEOLOGY,2003,31(11):1021-1024. |
| APA | Chung, SL.,Liu, DY.,Ji, JQ.,Chu, MF.,Lee, HY.,...&Zhang, Q.(2003).Adakites from continental collision zones: Melting of thickened lower crust beneath southern Tibet.GEOLOGY,31(11),1021-1024. |
| MLA | Chung, SL,et al."Adakites from continental collision zones: Melting of thickened lower crust beneath southern Tibet".GEOLOGY 31.11(2003):1021-1024. |
入库方式： OAI收割
来源：地质与地球物理研究所
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