Cratonic peridotites and silica-rich melts: Diopside-enstatite relationships in polymict xenoliths, Kaapvaal, South Africa
文献类型：期刊论文
| 作者 | Zhang, HF; Menzies, MA; Gurney, JJ; Zhou, XH |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2001-10-01 |
| 卷号 | 65期号:19页码:3365-3377 |
| ISSN号 | 0016-7037 |
| 文献子类 | Article |
| 英文摘要 | Silica-rich metasomatism is invoked as a mechanism for the conversion of clinopyroxene-bearing peridotites. to orthopyroxene-rich, clinopyroxene-poor peridotites. While harzburgites are a major constituent of the garnet-diamond facies "keel" of Archaean (> 2500 Ma) cratons, metasomatic conversion of lherzolite to harzburgite is not widely documented from cratonic rocks. We report on the replacement of diopside. by enstatite in polymict peridotites from Kimberley, South Africa and provide elemental and isotopic constraints on the nature of this process. Silica-rich metasomatism appears to have occurred at mid-craton depths and to have involved a silica-rich derivative of incompatible element-rich melts like kimberlite. The preservation of elemental and isotopic disequilibria in these mantle rocks may arise from the nearly synchronous occurrences of the kimberlite entrainment process and fluid-assisted deformation/crack propagation resulting in polymict formation. Copyright (C) 2001 Elsevier Science Ltd. |
| WOS关键词 | UPPER-MANTLE ; RARE-EARTH ; PARTITION-COEFFICIENTS ; ULTRAMAFIC XENOLITHS ; MELT/ROCK REACTION ; GARNET LHERZOLITE ; TRACE-ELEMENT ; TI OXIDES ; LITHOSPHERE ; EVOLUTION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000171388200013 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77081]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, HF |
| 作者单位 | 1.Acad Sinica, Inst Geol & Geophys, Lab Lithosphere Tecton Evolut, Beijing 100029, Peoples R China 2.Royal Holloway Univ London, Dept Geol, Egham TW20 0EX, Surrey, England 3.Univ Cape Town, Dept Geochem, ZA-7925 Cape Town, South Africa |
| 推荐引用方式 GB/T 7714 | Zhang, HF,Menzies, MA,Gurney, JJ,et al. Cratonic peridotites and silica-rich melts: Diopside-enstatite relationships in polymict xenoliths, Kaapvaal, South Africa[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2001,65(19):3365-3377. |
| APA | Zhang, HF,Menzies, MA,Gurney, JJ,&Zhou, XH.(2001).Cratonic peridotites and silica-rich melts: Diopside-enstatite relationships in polymict xenoliths, Kaapvaal, South Africa.GEOCHIMICA ET COSMOCHIMICA ACTA,65(19),3365-3377. |
| MLA | Zhang, HF,et al."Cratonic peridotites and silica-rich melts: Diopside-enstatite relationships in polymict xenoliths, Kaapvaal, South Africa".GEOCHIMICA ET COSMOCHIMICA ACTA 65.19(2001):3365-3377. |
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。