| 云南新平县双沟蛇绿岩稀土元素地球化学研究 |
| |
| 引用本文： | 黄忠祥,韩 松,董金泉,贾秀勤,张 旗,赵大升.云南新平县双沟蛇绿岩稀土元素地球化学研究[J].岩石矿物学杂志,1993,12(3):205-212. |
| |
| 作者姓名： | 黄忠祥 韩 松 董金泉 贾秀勤 张 旗 赵大升 |
| |
| 作者单位： | 中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院地质研究所，中国科学院地质研究所 北京 100080，北京 100080，北京 100080，北京 100080，北京 100029，北京 100029 |
| |
| 基金项目： | 国家自然科学基金委员会，中国科学院高能物理研究所与上海原子核研究所核分析技术联合开放实验室资助的 |
| |
| 摘 要： | 双沟蛇绿岩中,变质橄榄岩的REE分布型式为LREE富集型,可能是富大离子亲石元素(LILE)组分交代造成的。地幔岩部分熔融生成的初始熔体LREE亏损,而辉绿岩和玄武岩则存在LREE亏损和富集两种型式,前者相当于N-MORB,后者相当于E-MORB。推测前者来源于亏损的软流圈地幔,而后者的地幔源区经历过一次富集LREE和LILE的事件。双沟蛇绿岩的REE特征暗示它可能形成于弧后盆地。
|
| 关 键 词： | 蛇绿岩 地球化学 稀土族 云南 |
Rare Earth Element Geochemistry of Shuanggou Ophiolites from Xinping County,Yunnan Province |
| |
| Huang Zhongxiang,Han Song,Dong Jinquan,Jia Xiuqin,Zhang Qi,Zhao Dasheng Institute of High Ene gy Physics,Academia Sinic,Beijing Institute of Geology,Academia Sinica.Rare Earth Element Geochemistry of Shuanggou Ophiolites from Xinping County,Yunnan Province[J].Acta Petrologica Et Mineralogica,1993,12(3):205-212. |
| |
| Authors: | Huang Zhongxiang Han Song Dong Jinquan Jia Xiuqin Zhang Qi Zhao Dasheng Institute of High Ene gy Physics Academia Sinic Beijing Institute of Geology Academia Sinica |
| |
| Institution: | Huang Zhongxiang,Han Song,Dong Jinquan,Jia Xiuqin,Zhang Qi,Zhao Dasheng Institute of High Ene gy Physics,Academia Sinica,Beijing 100080 Institute of Geology,Academia Sinica |
| |
| Abstract: | Exposed in the Ailaoshan ophiolito belt and typically representing Paleo-tethyan ophiolites, the Shuanggou ophiolites are composed of metaperidotite,gabbro, diabase and basalt. Chemically, metaperidotite is of LREE--enriched type, resulting Probably from the metasomatism of components enriched in large--ionlithophile elements (LILE). The melt formed by partial melting of the mantleis depleted in LREE, whereas in diabase and basalt, there exist both LREE-depleted type and LREE-enriched type, with the former corresponding toN--MORB and the latter to E--MORB. It is considered that the LREE--depletedtype was derived from the depleted mantle source, while the LREE--enrichedtype experienced an event of LREE and LILE enrichment. The REE characte-ristics of Shuanggou ophiolites imply that they might have been formed in aback-arc basin environment. |
| |
| Keywords: | ophiolites REE geochemistry Yunnan |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
