| 超高压岩石中变质脉的研究 |
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| 引用本文： | 盛英明,郑永飞,吴元保.超高压岩石中变质脉的研究[J].岩石学报,2011,27(2):490-500. |
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| 作者姓名： | 盛英明 郑永飞 吴元保 |
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| 作者单位： | 1. 中国科学院壳幔物质与环境重点实验室,中国科学技术大学地球和空间科学学院,合肥,230026
2. 地质过程与矿产资源国家重点实验室,中国地质大学地球科学学院,武汉,430074 |
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| 基金项目： | 本文受国家自然科学基金项目(40703002、40973004)和中国科学技术大学青年创新基金联合资助. |
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| 摘 要： | 超高压岩石中的变质脉体是示踪变质流体活动的重要途径之一。高压-超高压岩石中不仅出露"纯"的石英脉(石英含量>98%),还出露了具有不同复杂矿物组合的"不纯"脉。最近的研究成果表明,对各种类型变质脉的观察和研究有助于深化对大陆碰撞造山带中变质流体/熔体性质以及元素迁移行为的认识。目前主要解决的科学问题包括:(1)确认形成各种类型脉的流体/熔体性质;(2)获得成脉过程中主微量元素(特别是流体不活动性HREE和HFSE)发生迁移的尺度和规模,探讨流体/熔体性质对超高压变质条件下元素地球化学行为的影响;(3)获得各种类型变质脉形成的确切时代。
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| 关 键 词： | 变质脉 流体性质 元素迁移 大陆碰撞带 |
| 收稿时间： | 2010/11/21 0:00:00 |
| 修稿时间： | 2011/1/11 0:00:00 |
Studies of metamorphic vein in ultrahigh-pressure rocks |
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| SHENG YingMing,ZHENG YongFei and WU YuanBao.Studies of metamorphic vein in ultrahigh-pressure rocks[J].Acta Petrologica Sinica,2011,27(2):490-500. |
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| Authors: | SHENG YingMing ZHENG YongFei and WU YuanBao |
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| Institution: | CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Metamorphic veins enclosed in ultrahigh-pressure rocks provide an unique opportunity to trace fluid activity during continental subduction. High-ultrahigh pressure rocks may contain "pure" quartz-vein (quartz content >98%), and variably complicated polymineral "impure" vein. Recent studies show that these metamorphic veins can be used to improve the understanding of fluid/melt nature and element transfer in continental collision zones. At present, the main scientific questions include: (1) identifying the fluid/melt nature that formed the variable metamorphic veins; (2) obtaining the ability and scale of major and trace element transfer (especially for the fluid-immobile HREE and HFSE) during veining, and investigating the difference in fluid/melt nature affects on the element geochemical behavior under UHP metamorphic conditions; (3) acquiring the exact timing of veining. |
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| Keywords: | Metamorphic vein Fluid nature Element transfer Continental collision zone |
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