Fluid/melt inclusions in Cenozoic mantle xenoliths from Linqu, Shandong Province, eastern China: Implications for asthenosphere-lithosphere interactions
Fluid/melt inclusions in Cenozoic mantle xenoliths from Linqu, Shandong Province, eastern China: Implications for asthenosphere-lithosphere interactions
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中国东部山东临朐新生代地幔捕虏体中的流体/熔体包裹体：对软流圈-岩石圈相互作用的影响
DOI：
10.1007/s11434-009-0622-4
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发表时间：
2010-04
期刊：
影响因子：
--
通讯作者：
Chen LiHui
中科院分区：
文献类型：
--
作者：
Ni Pei;Liu JiQiang;Chen LiHui
地幔捕虏体中的流体和熔体包裹体是研究地幔流体的直接样品。本文应用拉曼显微光谱和显微测温技术对山东临朐桥山玄武岩中二辉橄榄岩包体中的流体/熔体包裹体进行了研究。这些包裹体包括早期CO2流体包裹体、早期碳酸盐熔体包裹体、晚期CO2流体包裹体和晚期硅酸盐熔体包裹体。早期CO2流体包裹体中，大部分为高密度的纯CO2，也有少量的除CO2外的其它组分，包括石墨、菱镁矿、镁方解石、CO和N2。早期和晚期流体包裹体的最低捕获压力分别为1.42GPa和0.80GPa。由于斜方辉石是早期碳酸盐熔体包裹体的主要寄主矿物，我们认为这些碳酸盐熔体的形成与CO2流体和硅酸盐矿物（如橄榄石和单斜辉石）之间的相互作用有关。早期CO2流体包裹体中微量组分的多样性表明地幔橄榄岩与渗透流体/熔体发生了氧化还原反应。这些观测结果表明，岩石圈地幔的组成下研究区已被软流圈来源的富CO2流体/熔体改变。
Fluid and melt inclusions in mantle xenoliths are thought as direct samples to study mantle liquids. Here we apply Raman microspectroscopy and microthermometry to fluid/melt inclusions in lherzolite xenoliths in Qiaoshan basalts, a Miocene volcano in Linqu, Shandong Province, eastern China. These inclusions include (1) early CO2fluid inclusions, (2) early carbonate melt inclusions, (3) late CO2fluid inclusions, and (4) late silicate melt inclusions. Among the early CO2fluid inclusions, most consist of high-density pure CO2, while others have small amounts of other components besides of CO2, including graphite, magnesite, Mg-calcite, CO and N2. The lowest trapping pressures are estimated to be 1.42 GPa and 0.80 GPa for the early and the late fluid inclusions, respectively. Because orthopyroxene is the main host mineral for the early carbonate melt inclusions, we propose that the formation of these carbonate melts is genetically associated with the interactions between CO2fluids and silicate minerals, e.g. olivine and clinopyroxene. The diversity of minor components in the early CO2fluid inclusions indicates that mantle peridotites had undergone redox reactions with penetrating fluids/melts. These observations suggest that the compositions of the lithospheric mantle beneath the studied area had been changed by asthenosphere-derived CO2-rich fluids/melts.
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山东省临朐新生代玄武岩中单斜辉石中的玻璃熔体包裹体
DOI：
10.1007/s11434-006-2058-4
发表时间：
2006-08
期刊：
科学通报(英文版)
影响因子：
--
作者：
E. Nakamura;J. Zhang;I. Akira;H. F. Zhang
通讯作者：
H. F. Zhang
影响因子：
1.8
作者：
E. Molan
通讯作者：
E. Molan
影响因子：
3.5
作者：
Mingjie Zhang;Peiqing Hu;Y. Niu;S. Su
通讯作者：
Mingjie Zhang;Peiqing Hu;Y. Niu;S. Su
影响因子：
--
作者：
曹珍富
通讯作者：
曹珍富
影响因子：
3.5
作者：
Andersen, T;Neumann, ER
通讯作者：
Neumann, ER