| Sr-nd-os isotope geochemistry of permain picrites from muli area, southeast tibet | |
| Li Jie1; Xu JiFeng1; He Bin1; Xu YiGang1; Dong YanHui1,2 | |
| 刊名 | Acta petrologica sinica
 |
| 2008-02-01 | |
| 卷号 | 24期号:2页码:337-347 |
| 关键词 | Picrites Os-sr-nd isotope Mantle plume Permain Muli area Southeast tibet |
| ISSN号 | 1000-0569 |
| 通讯作者 | Li jie(jieli@gig.ac.cn) |
| 英文摘要 | Permain picrites and associated basalts were recognized in muli area, southeat tibet plateau. this paper presents their elemental and os, sr, and nd isotopic compositions. magmas of these picrites and associated basalts probably contaminated only minimal amounts of crustal material. based on ti/y ratios and os isotopic compositions, the. mini picrites can lie classified into two types: high-ti/y type and low-ti/y type: ( 1) high-ti/y type picrites have high ti/y and gamma(os) (+5.3 similar to + 10.7) and epsilon(nd) (+5. 9 - +6.4). the os and nd isotopic compositions of the high-ti/y picrites are similar to those of some modern ocean-island basal (oib), suggesting they were derived front a mantle plume; (2) low-ti/y type picrites have relatively low ti/y rind gamma(os) (- 4. 1 similar to + 1. 2) and epsilon(nd) (+ 3. 2 similar to +5. 0). they show snd values similar to high-ti/y type picrites but lower gamma(os), hinting they were derived from a mantle plume but their magmas experienced interaction with a subcontinental lithospheric mantle ( sclm). the associated basalts have gamma(os) of -3. 5 to - 1. 6 and epsilon(nd) of - 0. 6 to + 0. 7, also indicate that the basaltic magmas were probably mixed with a magma derived from sci,m. using initial os and nd isotopic ratios of a plume and sclm enchnember components for mixing model, the mixing diagram shows that the low=ti/y type picrites were produced by mixture of plume-type picritic melts with sclm, and associated basalts were generated by mixing of plume-type basaltic magma with small amount of melts from the sclm. |
| WOS关键词 | LARGE IGNEOUS PROVINCE ; EMEISHAN FLOOD BASALTS ; PLUME-LITHOSPHERE INTERACTION ; CORE-MANTLE INTERACTION ; OCEANIC ISLAND BASALTS ; RE-OS ; CONTINENTAL-CRUST ; SW CHINA ; OSMIUM ; EVOLUTION |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000259117600013 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2392418 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li Jie |
| 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 10039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Jie,Xu JiFeng,He Bin,et al. Sr-nd-os isotope geochemistry of permain picrites from muli area, southeast tibet[J]. Acta petrologica sinica,2008,24(2):337-347. |
| APA | Li Jie,Xu JiFeng,He Bin,Xu YiGang,&Dong YanHui.(2008).Sr-nd-os isotope geochemistry of permain picrites from muli area, southeast tibet.Acta petrologica sinica,24(2),337-347. |
| MLA | Li Jie,et al."Sr-nd-os isotope geochemistry of permain picrites from muli area, southeast tibet".Acta petrologica sinica 24.2(2008):337-347. |
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