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Recognition and significance of c. 800 Ma upper amphibolite to granulite facies metamorphism in metasedimentary rocks from the NW margin of the Yangtze Block

文献类型：期刊论文

作者Wang Haozheng2,3,4; Oscar, Laurent3; Zhang Huafeng1; Zhang Hong5; Chen Xi2; Zhai Mingguo4
刊名JOURNAL OF THE GEOLOGICAL SOCIETY
出版日期2020-03-01
卷号177期号:2页码:424-441
ISSN号0016-7649
DOI10.1144/jgs2019-035
英文摘要The evolutionary history of the NW Yangtze Block is important in interpreting its location and relationship with the Rodinia supercontinent. Although a Neoproterozoic arc-related tectonothermal event is recognized in the Micangshan area of the NW Yangtze Block, its timing and P-T conditions are poorly constrained. We address this issue by focusing on the garnet-biotite gneiss that represents the main lithology of the Huodiya Group on the NW margin of the Yangtze Block. This gneiss is predominantly composed of garnet, biotite, feldspar and quartz. The peak mineral assemblage in the matrix consists of garnet + biotite + quartz + plagioclase + K-feldspar. The retrograde stage is characterized by embayed rims of the garnet and its associated biotite in the matrix. The P-T conditions in the peak and retrograde stages are constrained to 7-8 kbar and c. 710 degrees C and 5-6 kbar and 650-675 degrees C, respectively, and suggest that 4-5 vol.% melt was produced during an upper amphibolitegranulite facies metamorphic event. The first report of monazite U-Pb dating in the Huodiya Group of the Micangshan area yielded aweighted mean Pb-206/U-238 age of 802 +/- 5 Ma. The studied samples contained detrital igneous zircons with Pb-206/U-238 dates >800 Ma, whereas the metamorphic zircons yielded a weighted mean Pb-206/U-238 age of 797 +/- 9 Ma. Based on the compressional tectonic environment and previous studies, we propose that the Yangtze Block was probably located on the periphery of the Rodinia supercontinent.
WOS关键词ZIRCON U-PB ; NEOPROTEROZOIC TECTONIC EVOLUTION ; SOUTH CHINA ; NORTHERN MARGIN ; GEOCHEMICAL EVIDENCE ; MONAZITE GROWTH ; HF ISOTOPES ; NORTHWESTERN MARGIN ; SIMILAR-TO-860 MA ; CATHAYSIA BLOCKS
资助项目Natural Science Foundation of China[41702199] ; Natural Science Foundation of China[41890830] ; Natural Science Foundation of China[41890834] ; China Scholar Council[201708515142]
WOS研究方向Geology
语种英语
WOS记录号WOS:000537276100013
出版者GEOLOGICAL SOC PUBL HOUSE
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Scholar Council ; China Scholar Council ; China Scholar Council ; China Scholar Council ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Scholar Council ; China Scholar Council ; China Scholar Council ; China Scholar Council ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Scholar Council ; China Scholar Council ; China Scholar Council ; China Scholar Council ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; China Scholar Council ; China Scholar Council ; China Scholar Council ; China Scholar Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/96668]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Wang Haozheng
作者单位1.China Univ Geosci, Dept Geosci & Resource, Beijing 100083, Peoples R China
2.Southwest Petr Univ, Sch Geosci & Technol, Div Key Lab Carbonate Reservoirs, CNPC, Chengdu 610500, Peoples R China
3.Fed Inst Technol, Dept Earth Sci, CH-8049 Zurich, Switzerland
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
推荐引用方式
GB/T 7714		 Wang Haozheng,Oscar, Laurent,Zhang Huafeng,et al. Recognition and significance of c. 800 Ma upper amphibolite to granulite facies metamorphism in metasedimentary rocks from the NW margin of the Yangtze Block[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2020,177(2):424-441.
APA Wang Haozheng,Oscar, Laurent,Zhang Huafeng,Zhang Hong,Chen Xi,&Zhai Mingguo.(2020).Recognition and significance of c. 800 Ma upper amphibolite to granulite facies metamorphism in metasedimentary rocks from the NW margin of the Yangtze Block.JOURNAL OF THE GEOLOGICAL SOCIETY,177(2),424-441.
MLA Wang Haozheng,et al."Recognition and significance of c. 800 Ma upper amphibolite to granulite facies metamorphism in metasedimentary rocks from the NW margin of the Yangtze Block".JOURNAL OF THE GEOLOGICAL SOCIETY 177.2(2020):424-441.

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来源：地质与地球物理研究所

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