| 绿帘石记录俯冲带变质流体活动 |
| |
| 引用本文： | 唐盼,郭顺.绿帘石记录俯冲带变质流体活动[J].岩石学报,2019,35(7):2045-2060. |
| |
| 作者姓名： | 唐盼 郭顺 |
| |
| 作者单位： | 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029;中国科学院大学, 北京 100049,中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029;中国科学院青藏高原地球科学卓越创新中心, 北京 100101 |
| |
| 基金项目： | 本文受国家重点基础研究发展计划项目（2015CB856103）、国家自然科学基金项目（41672059、41372079）和中国科学院青年创新促进会项目（2017090）联合资助. |
| |
| 摘 要： | 俯冲带是连接地球表生圈层和深部圈层的关键纽带,深刻影响着地球内部的运行方式和人类宜居环境。俯冲板片脱水释放的高压-超高压变质流体控制着俯冲带诸多重要地质过程,如地幔楔交代和部分熔融、岛弧岩浆活动、中/深源地震以及地球内部的元素迁移和分异等等。深入了解这些流体的源区、运移、成分和物理化学条件是理解这些流体性质和行为的前提和关键。绿帘石是俯冲带变质岩中一个常见的含水造岩矿物,具有较宽广的稳定温压范围(绿片岩相-榴辉岩相)、较高的微量元素含量和缓慢的体扩散行为(如Sr、Pb、Th、U、Cr、V和LREE),能够指示俯冲带(多期)变质流体活动和地球化学效应。本文总结了近年来俯冲带变质绿帘石研究的主要进展及其在揭示俯冲带流体活动方面的重要应用,包括探究俯冲带流体的起源、成分特征、运移方式、氧逸度条件、交代效应和多期次结晶行为。这些研究表明绿帘石是一个极好的变质流体活动记录器,能够为理解俯冲带流体活动和深部元素迁移提供关键信息。
|
| 关 键 词： | 绿帘石 俯冲带 变质流体 微量元素 同位素 |
| 收稿时间： | 2019/2/1 0:00:00 |
| 修稿时间： | 2019/6/5 0:00:00 |
Epidote records subduction-zone metamorphic fluid actions |
| |
| TANG Pan and GUO Shun.Epidote records subduction-zone metamorphic fluid actions[J].Acta Petrologica Sinica,2019,35(7):2045-2060. |
| |
| Authors: | TANG Pan and GUO Shun |
| |
| Institution: | State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China and State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China |
| |
| Abstract: | Subduction zone is the key link between the earth''s surface biosphere and lithosphere, which therefore significantly influences the evolution of the earth interior and habitable environment of human. Suitable scale of mobile fluid phase is commonly present in this setting. Those slab-derived high pressure (HP) or ultra-high pressure (UHP) metamorphic aqueous fluids control the key geological processes in subduction zones, such as the metasomatism and partial melting of mantle wedge, the formation of island arc lavas, the intermediate and deep earthquakes, and the element transfer and chemical differentiation. Knowledge of fluid source, flow manner, composition, and physico-chemical condition is the premise and key to understand the nature and behavior of subduction-zone fluids. Epidote is an important hydrous rock-forming mineral in subduction-zone metamorphic rocks. This mineral has a wide P-T stability range from greenschist facies to eclogite facies, high concentrations of trace elements (e.g., Sr, Pb, Th, U, Cr, V and LREE), and the negligible in body diffusion, which allow it to reflect the (multiple-stage) fluid activities and geochemical feedbacks in subduction zones. This paper reviewed the main research progress of epidote and its important applications in revealing the subduction-zone fluid activities for the past few years, including the origin, chemical composition, flow manner, oxygen fugacity, metasomatic effect, and multiple-stage crystallization of the fluids. These results indicate that epidote is an excellent recorder of metamorphic fluid actions, which could prove vital information to help understand the metamorphic fluid behavior and element transfer in subduction zones. |
| |
| Keywords: | Epidote Subduction zones Metamorphic fluid Trace elements Isotopes |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩石学报》浏览原始摘要信息 |
| 点击此处可从《岩石学报》下载免费的PDF全文 |
|
