Is there a neo-tethys' subduction record earlier than arc volcanic rocks in the sangri group?
文献类型：期刊论文
| 作者 | Dong, YH; Xu, JF; Zeng, QG; Wang, Q; Mao, GZ; Li, J |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2006-03-01 |
| 卷号 | 22期号:3页码:661-668 |
| ISSN号 | 1000-0569 |
| 关键词 | Tibetan plateau Neo-tethys Yeba formation Sangri group Lam-icp-ms dating |
| 通讯作者 | Dong, yh(jifengxu@gig.ac.cn) |
| 英文摘要 | Formation of the tibetan plateau is related to evolution of neo-tethys. it was thought that volcanic rocks in the sangri group were formed in late jurassic to early cretaceous, and represented the earliest magmatic record of the neo-tethys subduction. however, there is another volcanic suite called yeba formation in the east of the lhasa block. eruption of yeba volcanic rocks was thought to be earlier than the sangri group, but lark of chronological evidence. zircons from a sample of yeba formation lavas were selected and dated by lam-icp-ms, obtaining an age of 174 ma, indicating that yeba formation indeed is older than sangri group. in addition, lavas of the yeba formation show geochemical characteristics similar to volcanic rocks in an arc or active continental margin, such as liles' enrichment and hfses' depletion. we conclude that northward subduction of the neo-tethys resulted in the magmatic eruption of the yaba formation in early-middle jurassic. if it is true, the neo-tethys subduction probably started in early-middle jurassic or earlier. |
| WOS关键词 | TIBET |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000237332500015 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379416 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dong, YH |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Geol Survey Tibet, Duilongdeqing Lhasa 851400, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, YH,Xu, JF,Zeng, QG,et al. Is there a neo-tethys' subduction record earlier than arc volcanic rocks in the sangri group?[J]. Acta petrologica sinica,2006,22(3):661-668. |
| APA | Dong, YH,Xu, JF,Zeng, QG,Wang, Q,Mao, GZ,&Li, J.(2006).Is there a neo-tethys' subduction record earlier than arc volcanic rocks in the sangri group?.Acta petrologica sinica,22(3),661-668. |
| MLA | Dong, YH,et al."Is there a neo-tethys' subduction record earlier than arc volcanic rocks in the sangri group?".Acta petrologica sinica 22.3(2006):661-668. |
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来源：中国科学院大学
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