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Carboniferous eclogite and garnet-omphacite granulite from northeastern Hainan Island, South China: Implications for the evolution of the eastern Palaeo-Tethys

文献类型：期刊论文

作者Liu, Xiaochun2; Chen, Yi1; Wang, Wei-(RZ) Wei-(RZ)2; Xia, Mengmeng2; Hu, Juan2; Li, Yibing1; Hu, Daogong2; Song, Biao3
刊名JOURNAL OF METAMORPHIC GEOLOGY
出版日期2020-08-20
页码32
关键词Carboniferous collision eastern Palaeo-Tethys Hainan Island transitional eclogite-HP granulite facies metamorphism
ISSN号0263-4929
DOI10.1111/jmg.12563
英文摘要High-P(HP) eclogite and associated garnet-omphacite granulite have recently been discovered in the Mulantou area, northeastern Hainan Island, South China. These rocks consist mainly of garnet, omphacite, hornblende, quartz and rutile/ilmenite, with or without zoisite and plagioclase. Textural relationships, mineral compositions and thermobarometric calculations demonstrate that the eclogite and garnet-omphacite granulite share the same three-stage metamorphic evolution, with prograde, peak and retrogradeP-Tconditions of 620-680 degrees C and 8.7-11.1 kbar, 820-860 degrees C and 17.0-18.2 kbar, and 700-730 degrees C and 7.1-8.5 kbar respectively. Sensitive high-resolution ion microprobe U-Pb zircon dating, coupled with the identification of mineral inclusions in zircon, reveals the formation of mafic protoliths before 355 Ma, prograde metamorphism atc. 340-330 Ma, peak to retrograde metamorphism atc. 310-300 Ma, and subsequent pegmatite intrusion at 295 Ma. Trace element geochemistry shows that most of the rocks have a MORB affinity, with initial epsilon(Nd)values of +2.4 to +6.7. As with similar transitional eclogite-HP granulite facies rocks in the thickened root in the European Variscan orogen, the occurrence of relatively highP-Tmetamorphic rocks of oceanic origin in northeastern Hainan Island suggests Carboniferous oceanic subduction leading to collision of the Hainan continental block, or at least part of it, with the South China Block in the eastern Palaeo-Tethyan tectonic domain.
WOS关键词MA SUTURE ZONE ; CABO ORTEGAL COMPLEX ; BACK-ARC BASIN ; U-PB ISOTOPE ; BOHEMIAN MASSIF ; MOLDANUBIAN ZONE ; TRUONG SON ; THERMOBARIC STRUCTURE ; TECTONIC IMPLICATION ; METAMORPHIC HISTORY
资助项目National Natural Science Foundation of China[41972068] ; Geological Investigation Project of the Chinese Geological Survey[DD20190306] ; Geological Investigation Project of the Chinese Geological Survey[DD20160269] ; National Basic Research Program of China[2015CB856104]
WOS研究方向Geology
语种英语
WOS记录号WOS:000560927200001
出版者WILEY
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Basic Research Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Basic Research Program of China ; National Basic Research Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/97668]  
专题中国科学院地质与地球物理研究所
通讯作者Liu, Xiaochun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
2.Chinese Acad Geol Sci, Inst Geomech, Key Lab Paleomagnetism & Tecton Reconstruct, Minist Nat Resources, Beijing, Peoples R China
3.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Inst Geol, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiaochun,Chen, Yi,Wang, Wei-,et al. Carboniferous eclogite and garnet-omphacite granulite from northeastern Hainan Island, South China: Implications for the evolution of the eastern Palaeo-Tethys[J]. JOURNAL OF METAMORPHIC GEOLOGY,2020:32.
APA Liu, Xiaochun.,Chen, Yi.,Wang, Wei-.,Xia, Mengmeng.,Hu, Juan.,...&Song, Biao.(2020).Carboniferous eclogite and garnet-omphacite granulite from northeastern Hainan Island, South China: Implications for the evolution of the eastern Palaeo-Tethys.JOURNAL OF METAMORPHIC GEOLOGY,32.
MLA Liu, Xiaochun,et al."Carboniferous eclogite and garnet-omphacite granulite from northeastern Hainan Island, South China: Implications for the evolution of the eastern Palaeo-Tethys".JOURNAL OF METAMORPHIC GEOLOGY (2020):32.

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来源：地质与地球物理研究所

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