Oceanic crust components in continental basalts from Shuangliao, Northeast China: Derived from the mantle transition zone?
文献类型：期刊论文
| 作者 | Xu, Yi-Gang1; Zhang, Hui-Huang1,2; Qiu, Hua-Ning1; Ge, Wen-Chun3; Wu, Fu-Yuan2 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2012-10-18 |
| 卷号 | 328页码:168-184 |
| 关键词 | Ar-Ar dating Continental basalt Petrogenesis Geochemistry Young recycled oceanic crust Northeast China |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2012.01.027 |
| 文献子类 | Article |
| 英文摘要 | Basaltic rocks from Shuangliao, northeast China include basanite, alkali olivine basalt, transitional basalt and sub-alkaline diabase. Ar-Ar dating shows that the basanites and alkali olivine basalts formed earlier (48.5-51 Ma) than the transitional basalts and diabases (43-41.6 Ma). These rocks have the highest Fe2O3 contents (13.4-14.6 wt.%) and lowest (Sr-87/Sr-86)(i), ratios (<0.703) among the Cenozoic basalts from eastern China. On a primitive-mantle normalized variation diagram, they show positive Eu, Sr, Nb and Ta anomalies, and depletion in very incompatible elements (Rb, Ba, Th, U), reminiscent of HIMU-type oceanic island basalts. In particular, the basanites possess noticeable negative K anomalies. Nevertheless, their Pb isotopic compositions (Pb-206/Pb-204 = 18.13-18.34) do not show the high time-integrated U-238/Pb-204 mantle component expected for a HIMU basalt. On a Pb-206/Pb-204 versus Pb-207/Pb-204 diagram, most samples straddle the Northern Hemisphere Reference Line (NHRL), in salient contrast to the majority of Chinese Cenozoic basalts, which plot above the NHRL These data, as well as a comparison with high-pressure experimental melts, are consistent with the presence of young subducted oceanic crust (SOC) in the source of Shuangliao basalts. Varying (Sr-87/Sr-86)(i), La/Nb and Eu/Eu* with rock-type suggests that the upper oceanic crust (with variable amount of lower oceanic crust) was preferentially sampled by earlier (51-48 Ma), highly alkaline rocks, whereas the lower oceanic crust was predominantly sampled in later (41-43 Ma) transitional basalts and diabases. This temporal trend is attributed to the differential melting of a heterogeneous source in association with lithospheric thinning, during which fusible upper oceanic crust melted earlier than lower oceanic crust and peridotites. We postulate that the SOC components may have been derived from the seismically detected stagnant Pacific slab within the mantle transition zone. This hypothesis is supported by the same Indian MORB-like isotopic composition being found in the Shuangliao basalts and in the extinct Izanaghi-Pacific plate of NW Pacific. The latter has been subducting underneath the eastern Asian continent since the early Cretaceous. (C) 2012 Elsevier B.V. All rights reserved. |
| WOS关键词 | PARTIAL MELTING EXPERIMENTS ; LITHOSPHERE-ASTHENOSPHERE INTERACTION ; CENOZOIC VOLCANIC-ROCKS ; SINO-KOREAN CRATON ; EASTERN CHINA ; ISLAND BASALTS ; GARNET PYROXENITE ; NE CHINA ; HANNUOBA BASALTS ; TRACE-ELEMENT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000310124900010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; 40673038) ; 40673038) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84336]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Yi-Gang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Yi-Gang,Zhang, Hui-Huang,Qiu, Hua-Ning,et al. Oceanic crust components in continental basalts from Shuangliao, Northeast China: Derived from the mantle transition zone?[J]. CHEMICAL GEOLOGY,2012,328:168-184. |
| APA | Xu, Yi-Gang,Zhang, Hui-Huang,Qiu, Hua-Ning,Ge, Wen-Chun,&Wu, Fu-Yuan.(2012).Oceanic crust components in continental basalts from Shuangliao, Northeast China: Derived from the mantle transition zone?.CHEMICAL GEOLOGY,328,168-184. |
| MLA | Xu, Yi-Gang,et al."Oceanic crust components in continental basalts from Shuangliao, Northeast China: Derived from the mantle transition zone?".CHEMICAL GEOLOGY 328(2012):168-184. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。