Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean
文献类型：期刊论文
| 作者 | Liu, Chuan-Zhou1,2,3; Snow, Jonathan E.2,4; Hellebrand, Eric2,5; Bruegmann, Gerhard2; von der Handt, Anette2,5; Buechl, Anette2; Hofmann, Albrecht W.2 |
| 刊名 | NATURE
 |
| 出版日期 | 2008-03-20 |
| 卷号 | 452期号:7185页码:311-316 |
| ISSN号 | 0028-0836 |
| DOI | 10.1038/nature06688 |
| 文献子类 | Article |
| 英文摘要 | The Earth's mantle beneath ocean ridges is widely thought to be depleted by previous melt extraction, but well homogenized by convective stirring. This inference of homogeneity has been complicated by the occurrence of portions enriched in incompatible elements. Here we show that some refractory abyssal peridotites from the ultraslow- spreading Gakkel ridge ( Arctic Ocean) have very depleted Os-187/Os-188 ratios with model ages up to 2 billion years, implying the long- term preservation of refractory domains in the asthenospheric mantle rather than their erasure by mantle convection. The refractory domains would not be sampled by mid- ocean- ridge basalts because they contribute little to the genesis of magmas. We thus suggest that the upwelling mantle beneath mid- ocean ridges is highly heterogeneous, which makes it difficult to constrain its composition by mid- ocean- ridge basalts alone. Furthermore, the existence of ancient domains in oceanic mantle suggests that using osmium model ages to constrain the evolution of continental lithosphere should be approached with caution. |
| WOS关键词 | MID-ATLANTIC RIDGE ; OSMIUM ISOTOPIC COMPOSITION ; ABYSSAL PERIDOTITES ; MIDOCEAN RIDGE ; OS ISOTOPES ; MELT EXTRACTION ; INDIAN RIDGE ; MORB MANTLE ; SYSTEMATICS ; BASALTS |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000254117400038 |
| 出版者 | NATURE PUBLISHING GROUP |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69610]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, Chuan-Zhou |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Max Planck Inst Chem, Abt Geochem, D-55020 Mainz, Germany 3.Grad Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100039, Peoples R China 4.Univ Houston, Dept Geosci, Houston, TX 77204 USA 5.Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822 USA |
| 推荐引用方式 GB/T 7714 | Liu, Chuan-Zhou,Snow, Jonathan E.,Hellebrand, Eric,et al. Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean[J]. NATURE,2008,452(7185):311-316. |
| APA | Liu, Chuan-Zhou.,Snow, Jonathan E..,Hellebrand, Eric.,Bruegmann, Gerhard.,von der Handt, Anette.,...&Hofmann, Albrecht W..(2008).Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean.NATURE,452(7185),311-316. |
| MLA | Liu, Chuan-Zhou,et al."Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean".NATURE 452.7185(2008):311-316. |
入库方式： OAI收割
来源：地质与地球物理研究所
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