Chronology, geochemistry and tectonic significances of the Cenozoic Zougouyouchacuo and Nadingcuo volcanic rocks in northern Tibetan Plateau
文献类型：期刊论文
| 作者 | Liu JianFeng1; Chi XiaoGuo1; Zhao XiuYu1; Zhao Zhi1; Dong ChunYan2; Li GuangRong3; Zhao YuanDong4 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2009 |
| 卷号 | 25期号:12页码:3259-3274 |
| 关键词 | MC-ICP-MS MANTLE SOURCE QIANGTANG PETROGENESIS ALKALINE CONSTRAINTS EVOLUTION HF Tibetan Plateau Cenozoic volcanic rocks Adakite Geochemistry South Qiangtang area |
| ISSN号 | 1000-0569 |
| 其他题名 | Chronology, geochemistry and tectonic significances of the Cenozoic Zougouyouchacuo and Nadingcuo volcanic rocks in northern Tibetan Plateau |
| 英文摘要 | This paper reported petrology, geochronology and geochemistry of the Cenozoic volcanics from Zougouyouchacuo and Nadingcuo in South Qiangtang area, northern Tibetan Plateau. The volcanic rock in the study area is mainly composed of trachybasalt, mugearite, latite and trachyte. The volcanics show evolutionary trend from alkaline series to high-K calk-alkaline series. Zircon U-Pb dating indicates the volcanic rocks in Zougouyouchacuo and Nadingcuo area were formed in 34. 64 +/- 0. 55Ma and 35. 03 +/- 0. 54Ma respectively, besides there are lots of captured zircons in Zougouyouchacuo latite and trachyte. All of the samples have positive epsilon(Hf)( t) values, but epsilon(Hf)(t) decreases with the increase of SiO2. The fractionation between LREE and HREE is obvious, without or having minor negative Eu anomalies. The fractionation between HREE is also notable, with (Sm/Yb)(N) = 6.30 similar to 8.25, which indicates the primary magma originated from weakly depleted garnet-bearing asthenosphere. Through analysis the adakitic geochemical characteristics of the intermediate-acid magma in the area is formed by AFC (assimilation and fractional crystallization) of primary mantle-originated magma. The Late Eocene volcanism in South Qiangtang area may have relation to the upwelling of asthenosphere caused by breaking-off of northward subducted Lhasa lithosphere mantle. |
| 语种 | 英语 |
| CSCD记录号 | CSCD:3801826 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/151836]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.吉林大学 2.Chinese Acad Geol Sci, Institute Geol, Beijing 100037, Peoples R China Institute Geol 3.南京大学 4.中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Liu JianFeng,Chi XiaoGuo,Zhao XiuYu,et al. Chronology, geochemistry and tectonic significances of the Cenozoic Zougouyouchacuo and Nadingcuo volcanic rocks in northern Tibetan Plateau[J]. ACTA PETROLOGICA SINICA,2009,25(12):3259-3274. |
| APA | Liu JianFeng.,Chi XiaoGuo.,Zhao XiuYu.,Zhao Zhi.,Dong ChunYan.,...&Zhao YuanDong.(2009).Chronology, geochemistry and tectonic significances of the Cenozoic Zougouyouchacuo and Nadingcuo volcanic rocks in northern Tibetan Plateau.ACTA PETROLOGICA SINICA,25(12),3259-3274. |
| MLA | Liu JianFeng,et al."Chronology, geochemistry and tectonic significances of the Cenozoic Zougouyouchacuo and Nadingcuo volcanic rocks in northern Tibetan Plateau".ACTA PETROLOGICA SINICA 25.12(2009):3259-3274. |
入库方式： OAI收割
来源：金属研究所
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