Origin of extremely O-18-enriched eclogites in the Rongeheng region, Shandong province, China.
文献类型：期刊论文
| 作者 | Chu, XL; Guo, JH; Fan, HR; Jin, CW |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005-05-01 |
| 卷号 | 21期号:3页码:839-845 |
| 关键词 | Uhp Slab Eclogite Marble Oxygen Isotope Retrogressive Metamorphism Sulu Terrain |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The M-eclogites, hosted in marble, from Rongcheng region, Shandong Province, China were reported to be enriched extremely in O-18. So extremely O-18-enriched eclogites, however, have not been reported from other regions of the Dabie-Sulu UHP metamorphic zone so far. In the Rongeheng region, the extremely high delta(18)O values of M-eclogite suggest that a strong oxygen isotopic exchange happened between the M-eclogite and its country-rock, marble, during metamorphisms. The evidences from stable isotopes and fluid-inclusions reveal that the oxygen isotopic exchange probably took place during exhumation of the IJHP slab, since an overlying granulite-facies metamorphism resulted in decarbonation of the country-rock, the Neoproterozoic marine carbonates, that produced metamorphic fluids enriched in CO2. The metamorphic fluids were enriched extremely in O-18 and became a media for oxygen isotopic exchange between the M-eclogite and country-rock carbonate. The oxygen isotope equilibria were mostly attained among the marjor minerals in the M-eclogites, such as garnet, omphacite, quartz, and others, and between the M-eclogite and carbonate at higher temperature. Because the eclogites from the Rongcheng region commonly have the oxygen isotopic temperatures higher than that from the Dabie terrain and the southern Sulu terrain, they generally overlain granulite-facies and/or amphibolite-facies metamorphisms during the exhumation. The retrogressive fluids, especially the fluids enriched in CO2 produced during the granulite-facies metamorphism, were locally active that resulted in the M-eclogites enriched extremely in 18(O) in the Rongeheng region as distinct from common Meclogites from the Dabie-Sulu UHP zone besides this region. |
| WOS关键词 | STABLE-ISOTOPE GEOCHEMISTRY ; PRESSURE METAMORPHIC ROCKS ; EASTERN CHINA ; JIANGSU-PROVINCE ; DABIE MOUNTAINS ; LOW DELTA-O-18 ; QINGLONGSHAN OXYGEN ; ULTRAMAFIC ROCKS ; SULU TERRANE ; COESITE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000231179000023 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65072]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chu, XL |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Key Lab Mineral Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, XL,Guo, JH,Fan, HR,et al. Origin of extremely O-18-enriched eclogites in the Rongeheng region, Shandong province, China.[J]. ACTA PETROLOGICA SINICA,2005,21(3):839-845. |
| APA | Chu, XL,Guo, JH,Fan, HR,&Jin, CW.(2005).Origin of extremely O-18-enriched eclogites in the Rongeheng region, Shandong province, China..ACTA PETROLOGICA SINICA,21(3),839-845. |
| MLA | Chu, XL,et al."Origin of extremely O-18-enriched eclogites in the Rongeheng region, Shandong province, China.".ACTA PETROLOGICA SINICA 21.3(2005):839-845. |
入库方式： OAI收割
来源：地质与地球物理研究所
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