| 雷琼新生代玄武岩中地幔岩包体矿物中的流体─熔体包裹体的REE组成特征 |
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| 引用本文： | 周德进,鄂莫岚,徐平,韩松,黄忠祥,贾秀勤,董金泉.雷琼新生代玄武岩中地幔岩包体矿物中的流体─熔体包裹体的REE组成特征[J].岩石学报,1995,11(4). |
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| 作者姓名： | 周德进 鄂莫岚 徐平 韩松 黄忠祥 贾秀勤 董金泉 |
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| 作者单位： | 中国科学院地质研究所 |
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| 基金项目： | 国家自然科学基金，中科院院长基金，LNAT核分析技术联合开放实验室基金 |
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| 摘 要： | 雷琼地区新生代玄武岩中地幔岩包体的１２件单矿物稀土元素中子活化分析表明，雷州和琼北地幔岩包体中不含流体－熔体包裹体的同类矿物的ＲＥＥ组成有明显差异，反映了雷州与琼北玄武岩地幔源区ＲＥＥ组成的不均一性。通过对比同一地幔岩包体中含包裹体与不含包裹体相同矿物的微量元素组成，发现雷琼地幔岩包体矿物中的流体－熔体包裹体富含ＲＥＥ，尤其是ＬＲＥＥ；并且不同产地地幔包体同类矿物中和同一包体不同矿物中包裹体的丰度及其ＲＥＥ含量也有明显差异，表明地幔流体本身也存在不均一性。
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| 关 键 词： | 雷琼地区，地幔岩包体，流体－熔体包裹体，稀土元素组成，不均一性 |
The REE Characteristics of Fluid-Melt Inclusionsin Let-Qiong Mantle Xenoliths |
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| Zhou Dejin,E Molan and Xu Ping.The REE Characteristics of Fluid-Melt Inclusionsin Let-Qiong Mantle Xenoliths[J].Acta Petrologica Sinica,1995,11(4). |
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| Authors: | Zhou Dejin E Molan and Xu Ping |
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| Abstract: | In this research, instrumental neutron activation analysis (INAA) is used to analyzetwelve pure mineral samples selected from mantle xenoliths in Let-Qiong area (Leizhou Peninsula and Hainan ISland ). The spectrum gathering time of the analysing in INAA is 15000 seconds which are 5 to 10 times foranalysing granite. Leizhou and Hainan fluid-melt inclusions-free minerals have different REE contents, whichconfirmed the heterogeneity in Leizhou and Hainan mantle sources. The REE contents differences between sameminerals with and without fluid-melt inclusions selected from same mantle xenolith sample suggested that thefluid-melt inclusions are rich in REE, especially LREE. And the differences among the abundance of inclusionsand REE contents of same minerals selected from different mantle xenoliths and of different minerals selectedfrom same mantle xenolith, indicates the existence of heterogeneity in mantle fluids. |
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| Keywords: | Let-Qiong area Mantle xenolith Fluid-melt inclusion REE composition Heterogeneity |
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