|本期目录/Table of Contents|

[1]姜为佳,刘贻灿.超高压变质带中的变质不均一性[J].地球科学与环境学报,2016,38(02):160-171.
　JIANG Wei-jia,LIU Yi-can.Metamorphic Heterogeneity Within a Single Ultrahigh-pressure Belt[J].Journal of Earth Sciences and Environment,2016,38(02):160-171.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第38卷
期数:
2016年第02期
页码:
160-171
栏目:
基础地质与矿产地质
出版日期:
2016-03-15

文章信息/Info

Title:
Metamorphic Heterogeneity Within a Single Ultrahigh-pressure Belt
文章编号:
1672-6561(2016)02-0160-12
作者:
姜为佳; 刘贻灿
1.中国科学院壳幔物质与环境重点实验室,安徽 合肥230026; 2.中国科学技术大学 地球和空间科学学院,安徽 合肥230026
Author(s):
JIANG Wei-jia;  LIU Yi-can
1. Key Laboratory of Crust-mantle Materials and Environments, Chinese Academy of Sciences, Hefei 230026,Anhui, China; 2. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
关键词:
超高压变质带; 变质不均一性; 大陆深俯冲; 折返; 碰撞造山带; 榴辉岩; 退变质作用
Keywords:
UHP metamorphic belt;  metamorphic heterogeneity;  continental deep subduction;  exhumation;  collisional orogenic belt;  eclogite;  retrogression
分类号:
P588.3
DOI:
-
文献标志码:
A
摘要:
不同造山带的榴辉岩和有关变质表壳岩石中柯石英及金刚石等标志性超高压变质矿物的发现,已证明陆壳岩石能俯冲到大于120 km的地幔深度并折返至地表。超高压变质带中榴辉岩和相关的榴辉岩相岩石常常与具有低级变质矿物组合的岩石(如变质花岗岩、花岗片麻岩、变玄武岩或斜长角闪岩等)密切伴生,然而它们之间的相互关系和成因联系却一直是地质学家长期争议的焦点?查明这两类岩石的变质演化历史以及相互联系,对理解大陆的深俯冲及折返过程具有重要意义。在总结、分析若干陆陆碰撞造山带中变质不均一性的研究成果及成因解释的基础上,讨论了影响岩石保存超高压变质记录的若干关键因素,包括原岩性质、变质流体、构造变形、退变质作用等。
Abstract:
Ultrahigh-pressure (UHP) index minerals, such as coesite and diamond in eclogites and related metamorphosed supracrustal rocks from various orogenic belts, suggest that continental crustal rocks can be subducted to mantle depths of more than 120 km and subsequently return to the surface. Furthermore, eclogites and related eclogite-facies rocks, and low-grade mineral assemblage-bearing rocks (i.e. metagranite, granitic gneiss, meta-basalt and amphibolite) commonly coexist in UHP metamorphic belts. However, their relationship and petrogenetic links between high-grade and lower grade assemblage-bearing rocks are often matter of debate. Hence, to clarify the metamorphic evolutionary histories and the correlation of the two groups of rocks plays a significant role in understanding the continental deep subduciton and exhumation processes. Some investigations on the metamorphic heterogeneity within a single UHP metamorphic belt were summarized. On this basis, several key factors such as protolith nature, metamorphic fluids, structural deformation and retrogression, which affect the preservation of UHP metamorphic records, were discussed.

参考文献/References:

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　CHEN Xin,ZHENG You-ye,XU Rong-ke,et al.Exhumation Processes of UHP Metamorphic Belt in the Northern Qaidam and Their Constraints to Rutile Mineralization: Evidences from Compositional Zoning of Garnets in Yuqia and West Tieshiguan Areas[J].Journal of Earth Sciences and Environment,2016,38(02):143.
[2]李桂花,朱光明.苏鲁超高压变质带地震波场特征及地震资料处理[J].地球科学与环境学报,2006,28(03):78.
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备注/Memo

备注/Memo:
收稿日期:2015-11-23
基金项目:国家重点基础研究发展计划(“九七三”计划)项目(2015CB856104);国家自然科学基金项目(41273036)
作者简介:姜为佳(1990-),女,湖北黄冈人,理学硕士研究生,E-mail:dajiajia@mail.ustc.edu.cn。
通讯作者:刘贻灿(1962-),男,安徽潜山人,教授,博士研究生导师,理学博士,E-mail:liuyc@ustc.edu.cn。
更新日期/Last Update: 2016-03-28