Geochemistry and petrogenesis of Cenozoic potassic volcanic rocks in the Hoh Xil area, northern Tibet plateau
文献类型：期刊论文
| 作者 | Jiang DongHui1; Liu JiaQi1; Ding Lin2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 24期号:2页码:279-290 |
| 关键词 | Tibet Plateau Hoh Xil potassic volcanic rocks Cenozoic |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Miocene potassic volcanic rocks (7.77 similar to 17.82Ma) in the Hoh Xil area of northern Tibet Plateau are mainly of three types; trachyandesite, trachyte and some subvolcanic rhyolitic porphyry. Major- and trace-elements as well as Sr-Nd-Pb isotope geochemistry researches show: these potassic rocks are strongly enriched in large-ion lithophile elements and LREE, and evidently depleted Nb= Ta=Ti. They have relatively high Sr-87/Sr-86: 0.707346 similar to 0. 714915, low epsilon(Nd) : - 3. 70 similar to - 6. 97, and relatively high radiogenic Pb (Pb-207/Pb-204 = 15. 65 similar to 15. 76, Pb-208/Pb-204 = 38. 98 similar to 39. 35, Pb-206/Pb-204 = 18. 67 similar to 18. 78). The above characteristics indicate that the source of the magmas is an enriched EM H mantle which possibly resulted from earlier episodes of oceanic slab subduction. Ceochemical variation of the three major rocks indicate this series of rocks are formed by fractional crystallization of parental magmas which is generated by low degree partial melting of enriched mantle ( phlogopite-spinel lherzolite and phlogopite-garnet lherzolite), and the rhyolitic porphyry may undergo much more complicated process of crustal assimilation and fractional crystallization. |
| WOS关键词 | SOUTHERN TIBET ; MANTLE SOURCE ; ISOTOPIC CHARACTERISTICS ; ULTRAPOTASSIC MAGMATISM ; CONTINENTAL COLLISION ; TECTONIC IMPLICATIONS ; LOWER CRUST ; ARC MAGMAS ; CONSTRAINTS ; CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000259117600008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69230]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Jiang DongHui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Qinghai Tibetan Plateau Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang DongHui,Liu JiaQi,Ding Lin. Geochemistry and petrogenesis of Cenozoic potassic volcanic rocks in the Hoh Xil area, northern Tibet plateau[J]. ACTA PETROLOGICA SINICA,2008,24(2):279-290. |
| APA | Jiang DongHui,Liu JiaQi,&Ding Lin.(2008).Geochemistry and petrogenesis of Cenozoic potassic volcanic rocks in the Hoh Xil area, northern Tibet plateau.ACTA PETROLOGICA SINICA,24(2),279-290. |
| MLA | Jiang DongHui,et al."Geochemistry and petrogenesis of Cenozoic potassic volcanic rocks in the Hoh Xil area, northern Tibet plateau".ACTA PETROLOGICA SINICA 24.2(2008):279-290. |
入库方式： OAI收割
来源：地质与地球物理研究所
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