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The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction

文献类型：期刊论文

作者Cheng, Hao1; DuFrane, S. Andrew2; Vervoort, Jeffrey D.2; Nakamura, Eizo3; Li, Qiuli4; Zhou, Zuyi
刊名LITHOS
出版日期2010-06-01
卷号117期号:1-4页码:82-98
关键词Continental subduction Dabie Eclogite Geochronology Lu-Hf U-Pb
ISSN号0024-4937
DOI10.1016/j.lithos.2010.02.007
文献子类Article
英文摘要Low-temperature and high-pressure eclogites with an oceanic affinity in the western part of the Dabie orogen have been investigated with combined Lu-Hf and U-Pb geochronology. These eclogites formed over a range of temperatures (482-565 degrees C and 1.9-22 GPa) Three eclogites, which were sampled from the Gaoqiao country, yielded Lu-Hf ages of 240.7 +/- 1.2 Ma, 243 3 +/- 4.1 Ma and 238.3 +/- 1.2 Ma, with a corresponding lower-intercept U-Pb zircon age of 232 +/- 26 Ma Despite the well-preserved prograde major- and trace-element zoning in garnets, these Lu-Hf ages mostly reflect the high-pressure eclogite-facies metamorphism instead of representing the early phase of garnet growth due to the occurrence of omphacite inclusions from core to rim and the shell effect. An upper-Intercept zircon U-Pb age of 765 +/- 24 Ma is defined for the Gaoqiao eclogite, which is consistent with the weighted-mean age of 768 +/- 21 Ma for the country gneiss However, the gneiss has not been subjected to successive high-pressure metamorphism The new Triassic ages are likely an estimate of the involvement of oceanic fragments in the continental subduction (C) 2010 Elsevier B V All rights reserved
WOS关键词ULTRAHIGH-PRESSURE METAMORPHISM ; EAST-CENTRAL CHINA ; CONSISTENT THERMODYNAMIC DATA ; OXYGEN-ISOTOPE EVIDENCE ; SM-ND GEOCHRONOLOGY ; LU-HF ; U-PB ; RAYLEIGH FRACTIONATION ; COOLING HISTORY ; ZIRCON GROWTH
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000278731800006
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(40973005) ; National Natural Science Foundation of China(40973005) ; National Basic Research Program of China(2009CB825006) ; National Basic Research Program of China(2009CB825006) ; Shanghai Rising-Star Program(10QA1406800) ; Shanghai Rising-Star Program(10QA1406800) ; COE-21 program ; COE-21 program ; NSF(EAR-0609856 ; NSF(EAR-0609856 ; Program of Shanghai Subject Chief Scientist(08XD14042) ; Program of Shanghai Subject Chief Scientist(08XD14042) ; EAR-0711280) ; EAR-0711280) ; National Natural Science Foundation of China(40973005) ; National Natural Science Foundation of China(40973005) ; National Basic Research Program of China(2009CB825006) ; National Basic Research Program of China(2009CB825006) ; Shanghai Rising-Star Program(10QA1406800) ; Shanghai Rising-Star Program(10QA1406800) ; COE-21 program ; COE-21 program ; NSF(EAR-0609856 ; NSF(EAR-0609856 ; Program of Shanghai Subject Chief Scientist(08XD14042) ; Program of Shanghai Subject Chief Scientist(08XD14042) ; EAR-0711280) ; EAR-0711280) ; National Natural Science Foundation of China(40973005) ; National Natural Science Foundation of China(40973005) ; National Basic Research Program of China(2009CB825006) ; National Basic Research Program of China(2009CB825006) ; Shanghai Rising-Star Program(10QA1406800) ; Shanghai Rising-Star Program(10QA1406800) ; COE-21 program ; COE-21 program ; NSF(EAR-0609856 ; NSF(EAR-0609856 ; Program of Shanghai Subject Chief Scientist(08XD14042) ; Program of Shanghai Subject Chief Scientist(08XD14042) ; EAR-0711280) ; EAR-0711280) ; National Natural Science Foundation of China(40973005) ; National Natural Science Foundation of China(40973005) ; National Basic Research Program of China(2009CB825006) ; National Basic Research Program of China(2009CB825006) ; Shanghai Rising-Star Program(10QA1406800) ; Shanghai Rising-Star Program(10QA1406800) ; COE-21 program ; COE-21 program ; NSF(EAR-0609856 ; NSF(EAR-0609856 ; Program of Shanghai Subject Chief Scientist(08XD14042) ; Program of Shanghai Subject Chief Scientist(08XD14042) ; EAR-0711280) ; EAR-0711280)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72432]  
专题中国科学院地质与地球物理研究所
通讯作者Cheng, Hao
作者单位1.Tongji Univ, Sch Ocean & Earth Sci, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
2.Washington State Univ, Sch Earth & Environm Sci, Pullman, WA 99164 USA
3.Okayama Univ Misasa, Inst Study Earths Interior, Tottori 6820193, Japan
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Hao,DuFrane, S. Andrew,Vervoort, Jeffrey D.,et al. The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction[J]. LITHOS,2010,117(1-4):82-98.
APA Cheng, Hao,DuFrane, S. Andrew,Vervoort, Jeffrey D.,Nakamura, Eizo,Li, Qiuli,&Zhou, Zuyi.(2010).The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction.LITHOS,117(1-4),82-98.
MLA Cheng, Hao,et al."The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction".LITHOS 117.1-4(2010):82-98.

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来源：地质与地球物理研究所

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