Phenocryst He-Ar isotopic and whole-rock geochemical constraints on the origin of crustal components in the mantle source of Cenozoic continental basalt in eastern China
文献类型：期刊论文
| 作者 | Xu, Zheng1; Zheng, Yong-Fei1; He, Huai-Yu2; Zhao, Zi-Fu1 |
| 刊名 | JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
 |
| 出版日期 | 2014-02-15 |
| 卷号 | 272页码:99-110 |
| 关键词 | Noble gas isotopes Phenocryst minerals Whole-rock geochemistry Continental basalt Mantle source |
| ISSN号 | 0377-0273 |
| DOI | 10.1016/j.jvolgeores.2014.01.001 |
| 文献子类 | Article |
| 英文摘要 | Continental basalts commonly exhibit similar geochemical compositions to oceanic island basalts, but their origin is still enigmatic in chemical geodynamics. This involves a resolution to the nature of crustal components in their mantle sources. For this purpose, we have studied the He and Ar isotopic compositions of mineral phenocrysts from Cenozoic continental basalts in eastern China. The results are combined with existing data for whole-rock geochemistry, yielding two trends between noble gas isotopic and other geochemical indicators. First is high He-3/He-4 ratios of 6.6 to 7.5 R-A and low He-4/Ar-40* ratios of 0.07 to 139 in association with varying (La/Yb)(N) values from 10.4 to 31.8. Second is low He-3/He-4 ratios of 0.6 to 2.4 RA and variable He-4/Ar-40* ratios from 0.68 to 15.47 in association with low (La/Yb)N values of 11.3 to 12.0. Phenocryst Ar-40/Ar-36 ratios vary from 331.0 to 1677.4, in which the low ratios are associated with the low (La/Yb)N values. In combination with whole-rock Ba/Th and Sr/Y ratios as well as initial Sr and Nd isotopic ratios, we suggest three-component mixing between enriched MORB mantle, altered oceanic basalt and seafloor sediment to generate the mantle sources. The two kinds of crustal components would be incorporated into the mantle sources in the form of felsic melts. One is adakitic melt deriving from the altered oceanic basalt and thus low in Wilk ratios but high in Sr/Y, (La/Yb)N and eNd(t) values. The other is sialic melt originating from the seafloor sediment and thus high in Bajh ratios but low in Sr/Y, (La/Yb)(N) and epsilon(Nd)(t) values. The atmospheric Ar and crustal He noble gas components would be carried by the both seawater-hydrothermally altered basalt and seafloor sediment on the oceanic crust. These oceanic crust-derived melts would serve as a metasomatic agent to transfer the supracrustal He and Ar isotopic signatures to the mantle sources. The felsic melts would react with the mantle wedge peridotite during slab-mantle interaction in oceanic subduction channel. Therefore, the noble gas isotopic compositions of mantle sources for intraplate basalts are primarily determined by the budget between the mantle and crustal components during the melt-peridotite in oceanic subduction factory. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS关键词 | SUBCONTINENTAL LITHOSPHERIC MANTLE ; METAMORPHIC CHEMICAL GEODYNAMICS ; NOBLE-GAS SYSTEMATICS ; NORTH CHINA ; OCEANIC-CRUST ; TRACE-ELEMENT ; DIFFUSIVE FRACTIONATION ; CRATONIC LITHOSPHERE ; SUBDUCTION ZONES ; HELIUM-ISOTOPES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000332908900008 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Natural Science Foundation of China(41303005 ; Natural Science Foundation of China(41303005 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 91014007 ; 91014007 ; 41125012 ; 41125012 ; 41221062) ; 41221062) ; Natural Science Foundation of China(41303005 ; Natural Science Foundation of China(41303005 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 91014007 ; 91014007 ; 41125012 ; 41125012 ; 41221062) ; 41221062) ; Natural Science Foundation of China(41303005 ; Natural Science Foundation of China(41303005 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 91014007 ; 91014007 ; 41125012 ; 41125012 ; 41221062) ; 41221062) ; Natural Science Foundation of China(41303005 ; Natural Science Foundation of China(41303005 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 91014007 ; 91014007 ; 41125012 ; 41125012 ; 41221062) ; 41221062) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85996]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Zheng |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, CAS Key Lab Earths Deep Interior, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Zheng,Zheng, Yong-Fei,He, Huai-Yu,et al. Phenocryst He-Ar isotopic and whole-rock geochemical constraints on the origin of crustal components in the mantle source of Cenozoic continental basalt in eastern China[J]. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH,2014,272:99-110. |
| APA | Xu, Zheng,Zheng, Yong-Fei,He, Huai-Yu,&Zhao, Zi-Fu.(2014).Phenocryst He-Ar isotopic and whole-rock geochemical constraints on the origin of crustal components in the mantle source of Cenozoic continental basalt in eastern China.JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH,272,99-110. |
| MLA | Xu, Zheng,et al."Phenocryst He-Ar isotopic and whole-rock geochemical constraints on the origin of crustal components in the mantle source of Cenozoic continental basalt in eastern China".JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 272(2014):99-110. |
入库方式： OAI收割
来源：地质与地球物理研究所
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