The chemical-temporal evolution of lithospheric mantle underlying the North China Craton
文献类型：期刊论文
| 作者 | Wu, Fu-Yuan; Walker, Richard J.; Yang, Yue-Heng; Yuan, Hong-Lin; Yang, Jin-Hui |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2006-10-01 |
| 卷号 | 70期号:19页码:5013-5034 |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2006.07.014 |
| 文献子类 | Review |
| 英文摘要 | Previous studies of samples of subcontinental lithospheric mantle (SCLM) that underlay the North China Craton (NCC) during the Paleozoic have documented the presence of thick Archean SCLM at this time. In contrast, samples of SCLM underlying the NCC during the Cenozoic are characterized by evidence for melt depletion during the Proterozoic, and relatively recent juvenile additions to the lithosphere. These observations, coupled with geophysical evidence for relatively thin lithosphere at present, have led to the conclusion that the SCLM underlying the NCC was thinned and modified subsequent to the late Paleozoic. In order to extend the view into both the Paleozoic and modern SCLM underlying the NCC, we examine mantle xenoliths and xenocrystic chromites extracted from three Paleozoic kimberlites (Tieling, Fuxian and Mengyin), and mantle xenoliths extracted from one Cenozoic basaltic center (Kuandian). Geochemical data suggest that most of the Kuandian xenoliths are residues of small degrees of partial melting from chemically primitive mantle. Sr-Nd-Hf isotopic analyses indicate that the samples were removed from long-term depleted SCLM that had later been variably enriched in incompatible elements. Osmium isotopic compositions of the two most refractory xenoliths are depleted relative to the modern convecting upper mantle and have model melt depletion ages that indicate melt depletion during Paleoproterozoic. Other relatively depleted xenoliths have Os isotopic compositions consistent with the modern convecting upper mantle. This observation is generally consistent with earlier data for xenoliths from other Cenozoic volcanic systems in the NCC and surrounding cratons. Thus, the present SCLM underlying the NCC has a complex age structure, but does not appear to retain materials with Archean melt depletion ages. Results for what are presumed to be early Paleozoic xenoliths from Teiling are generally highly depleted in melt components, e.g. have low Al2O3, but have also been metasomatically altered. Enrichment in light rare earth elements, low epsilon(Nd) values (similar to-10), and relatively high Sr-87/Sr-86 (0.707-0.710) are consistent with a past episode of metasomatism. Despite the metasomatic event, Os-187/Os-188 ratios are low and consistent with a late Archean melt depletion event. Thus, like results for xenoliths from other early Paleozoic volcanic centers within the NCC, these rocks sample dominantly Archean SCLM. The mechanism for lithospheric thinning is still uncertain. The complex age structure currently underlying the NCC requires either variable melt depletion over the entire history of this SCLM, or the present lithospheric material was partly or wholly extruded under the NCC from elsewhere by the plate collisions (collision with the Yangtze Craton and/or NNW subduction of the Pacific plate) that may have caused the thinning to take place. (c) 2006 Elsevier Inc. All rights reserved. |
| WOS关键词 | RE-OS ISOTOPE ; SPINEL PERIDOTITE XENOLITHS ; SINO-KOREAN CRATON ; LOWER CONTINENTAL-CRUST ; RARE-EARTH ELEMENTS ; EAST-AFRICAN RIFT ; U-PB ; ULTRAMAFIC XENOLITHS ; ABYSSAL PERIDOTITES ; ORTHO-PYROXENE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000241143300013 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66382]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wu, Fu-Yuan |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Maryland, Dept Geol, Isotope Geochem Lab, College Pk, MD 20742 USA 3.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Fu-Yuan,Walker, Richard J.,Yang, Yue-Heng,et al. The chemical-temporal evolution of lithospheric mantle underlying the North China Craton[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2006,70(19):5013-5034. |
| APA | Wu, Fu-Yuan,Walker, Richard J.,Yang, Yue-Heng,Yuan, Hong-Lin,&Yang, Jin-Hui.(2006).The chemical-temporal evolution of lithospheric mantle underlying the North China Craton.GEOCHIMICA ET COSMOCHIMICA ACTA,70(19),5013-5034. |
| MLA | Wu, Fu-Yuan,et al."The chemical-temporal evolution of lithospheric mantle underlying the North China Craton".GEOCHIMICA ET COSMOCHIMICA ACTA 70.19(2006):5013-5034. |
入库方式： OAI收割
来源：地质与地球物理研究所
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