中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Metamorphic P-T-t paths of the Zanhuang metamorphic complex: Implications for the Paleoproterozoic evolution of the Trans-North China Orogen

文献类型：期刊论文

作者Xiao, Ling-Ling1,2; Liu, Fu-Lai2; Chen, Yi3
刊名PRECAMBRIAN RESEARCH
出版日期2014-12-01
卷号255页码:216-235
关键词Metapelite P-T path Pseudosection Zircon U-Pb dating Zanhuang Trans-North China Orogen
ISSN号0301-9268
DOI10.1016/j.precamres.2014.09.027
文献子类Article
英文摘要Garnet-bearing metapelites are cropped out in the Zanhuang metamorphic complex located in the central section of the N-S trending Trans-North China Orogen. Petrological studies indicate that these garnet-bearing metapelites preserve three distinct metamorphic assemblages (M-1-M-3). The cores of garnet porphyroblasts and fine-grained inclusions of plagioclase+quartz +/- biotite +/- apatite +/- magnetite +/- rutile +/- ilmenite define the prograde metamorphic stage (M-1). The assemblage of the peak metamorphic stage (M-2) consists of biotite + plagioclase + quartz +/- kyanite +/- hornblende +/- magnetite +/- ilmenite in equilibrium with the lowest-X-Mn garnet rims. The peak metamorphism was followed by a near-isothermal decompressional stage (M-3) and the development of symplectitic coronas of biotite + plagioclase + quartz +/- hornblende +/- magnetite surrounding garnet porphyroblasts. Quantitative phase equilibria modeling and traditional thermobarometric estimations were applied to yield P-T conditions of 4.5-5.9 kbar and 551-596 degrees C for stage M-1, 9.6-12.3 kbar and 770-830 degrees C for stage M-2, and similar to 4.7 kbar and similar to 635 degrees C for stage M-3. The combination of the mineral inclusions, mineral compositions, and metamorphic reactions in the Zanhuang metapelites defines a clockwise P-T path with nearly isothermal decompression, which is considered to have been related to the amalgamation of the Eastern and Western Blocks to form the North China Craton. Abundant U-Pb spot analyses of metamorphic zircons from the gneiss and amphibolite reveal two discrete, meaningful ages of metamorphism within the Zanhuang complex: the first age dates to -2507 Ma, and the second age dates to similar to 1839 Ma. The first age group (similar to 2507 Ma) was most likely associated with a regional Neoarchean granulite-facies metamorphic event within the North China Craton, whereas the second age group (similar to 1839 Ma) is interpreted as the result of a Paleoproterozoic orogenic event that occurred in the Trans-North China Orogen (TNCO). (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词LIAO-JI BELT ; LA-ICP-MS ; HIGH-PRESSURE GRANULITES ; PARTIAL MELTING EQUILIBRIA ; MAJOR TECTONIC UNITS ; CRATON KEY ISSUES ; U-PB ; EASTERN BLOCK ; ZIRCON GEOCHRONOLOGY ; MAFIC GRANULITES
WOS研究方向Geology
语种英语
WOS记录号WOS:000347578000013
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41102120 ; National Natural Science Foundation of China(41102120 ; Chinese National 973 Program(2012CB416603) ; Chinese National 973 Program(2012CB416603) ; Geology Survey of China(1212011120150) ; Geology Survey of China(1212011120150) ; 41430210 ; 41430210 ; 40725007) ; 40725007) ; National Natural Science Foundation of China(41102120 ; National Natural Science Foundation of China(41102120 ; Chinese National 973 Program(2012CB416603) ; Chinese National 973 Program(2012CB416603) ; Geology Survey of China(1212011120150) ; Geology Survey of China(1212011120150) ; 41430210 ; 41430210 ; 40725007) ; 40725007) ; National Natural Science Foundation of China(41102120 ; National Natural Science Foundation of China(41102120 ; Chinese National 973 Program(2012CB416603) ; Chinese National 973 Program(2012CB416603) ; Geology Survey of China(1212011120150) ; Geology Survey of China(1212011120150) ; 41430210 ; 41430210 ; 40725007) ; 40725007) ; National Natural Science Foundation of China(41102120 ; National Natural Science Foundation of China(41102120 ; Chinese National 973 Program(2012CB416603) ; Chinese National 973 Program(2012CB416603) ; Geology Survey of China(1212011120150) ; Geology Survey of China(1212011120150) ; 41430210 ; 41430210 ; 40725007) ; 40725007)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85316]  
专题中国科学院地质与地球物理研究所
通讯作者Xiao, Ling-Ling
作者单位1.Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R China
2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Ling-Ling,Liu, Fu-Lai,Chen, Yi. Metamorphic P-T-t paths of the Zanhuang metamorphic complex: Implications for the Paleoproterozoic evolution of the Trans-North China Orogen[J]. PRECAMBRIAN RESEARCH,2014,255:216-235.
APA Xiao, Ling-Ling,Liu, Fu-Lai,&Chen, Yi.(2014).Metamorphic P-T-t paths of the Zanhuang metamorphic complex: Implications for the Paleoproterozoic evolution of the Trans-North China Orogen.PRECAMBRIAN RESEARCH,255,216-235.
MLA Xiao, Ling-Ling,et al."Metamorphic P-T-t paths of the Zanhuang metamorphic complex: Implications for the Paleoproterozoic evolution of the Trans-North China Orogen".PRECAMBRIAN RESEARCH 255(2014):216-235.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。