| 大陆板块俯冲和折返过程中的流体活动：稳定同位素证据 |
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| 引用本文：郑永飞.2005.大陆板块俯冲和折返过程中的流体活动：稳定同位素证据[J].地球学报,26(z1):94-97. |
| DOI：10.3975/cagsb.2005.s1.32 |
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| 基金项目:本文由国家自然科学基金项目（编号：G1999075503)资助。 |
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| 中文摘要:对大别-苏鲁造山带超高压变质岩矿物稳定同位素的系统研究发现，超高压变质过程中存在少量含水流体，但是流体的活动性很小，在不同岩相界面之间缺乏明显的流体渗透；超高压榴辉岩中的石英脉是蜂期变质后含水矿物降压分解和羟基出溶引起的流体流动结果，不是板块俯冲过程中进变质作用的产物；超高压变质岩经历了广泛的角闪岩相退变质作用，退变质流体主要来源于板块折返过程中超高压矿物中溶解经基的降压出溶。 |
| 中文关键词:超高压变质 流体活动 结构羟基 稳定同位素 |
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| Stable Isotope Evidence for Fluid Activity During Subduction and Exhumation of the Continental Crust |
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| Abstract:Systematic studies involving stable isotopes, fluid inclusions and petrological phase relationships were conducted in the past few years with respect to the mobility and amounts of metamorphic fluids in UHP metamorphic rocks of the Dabie-Sulu orogenic belt. The results demonstrate that the fluid activity during the exhumation of deep-subducted continental crust has the following effects:①amphibolite-facies retrogression due to pervasive fluid flow;②formation of HP quartz veins within eclogites due to channelized fluid flour;③partial melting of overlying crustal rocks due to focused fluid flow, producing syn-exhumation magmatism within the orogenic belt. |
| keywords:ultrahigh pressure metamorphism fluid activity structural hydroxyl stable isotope |
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