Zircon U-Pb ages and Hf isotope compositions of migmatites from the North Qinling terrane and their geological implications
文献类型：期刊论文
| 作者 | Liu, Q.1; Wu, Y. -B.1; Wang, H.1; Gao, S.1; Qin, Z. -W.1; Liu, X. -C.1,2; Yang, S. -H.2; Gong, H. -J.3 |
| 刊名 | JOURNAL OF METAMORPHIC GEOLOGY
 |
| 出版日期 | 2014-02-01 |
| 卷号 | 32期号:2页码:177-193 |
| ISSN号 | 0263-4929 |
| 关键词 | Hf isotope composition zircon U-Pb age North Qinling unit migmatite |
| DOI | 10.1111/jmg.12065 |
| 文献子类 | Review |
| 英文摘要 | Migmatites are predominant in the North Qinling (NQ) orogen, but their formation ages are poorly constrained. This paper presents a combined study of cathodoluminescence imaging, U-Pb age, trace element and Hf isotopes of zircon in migmatites from the NQ unit. In the migmatites, most zircon grains occur as new, homogeneous crystals, while some are present as overgrowth rims around inherited cores. Morphological and trace element features suggest that the zircon crystals are metamorphic and formed during partial melting. The inherited cores have oscillatory zoning and yield U-Pb ages of c. 900Ma, representing their protolith ages. The early Neoproterozoic protoliths probably formed in an active continental margin, being a response to the assembly of the supercontinent Rodinia. The migmatite zircon yields Hf model ages of 1911 +/- 20 to 990 +/- 22Ma, indicating that the protoliths were derived from reworking of Palaeoproterozoic to Neoproterozoic crustal materials. The anatexis zircon yields formation ages ranging from 455 +/- 5 to 420 +/- 4Ma, with a peak at c. 435Ma. Combined with previous results, we suggest that the migmatization of the NQ terrane occurred at c. 455-400Ma. The migmatization was c. 50Ma later than the c. 490Ma ultra-high-P (UHP) metamorphism, indicating that they occurred in two independent tectonic events. By contrast, the migmatization was coeval with the granulite facies metamorphism and the granitic magmatism in the NQ unit, which collectively argue for their formation due to the northward subduction of the Shangdan Ocean. UHP rocks were distributed mainly along the northern margin and occasionally in the inner part of the NQ unit, indicating that they were exhumed along the northern edge and detached from the basement by the subsequent migmatization process. |
| WOS关键词 | PRESSURE METAMORPHIC ROCKS ; SOUTH CHINA BLOCKS ; EARLY PALEOZOIC METAMORPHISM ; COESITE-BEARING ECLOGITES ; DABIE-SULU OROGEN ; IN-SITU HF ; TECTONIC EVOLUTION ; LU-HF ; TRACE-ELEMENT ; EASTERN ASIA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000334398200003 |
| 资助机构 | National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; B07039) ; B07039) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; B07039) ; B07039) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; B07039) ; B07039) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; B07039) ; B07039) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85369]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, Q. |
| 作者单位 | 1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Fac Earth Sci, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China 3.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Q.,Wu, Y. -B.,Wang, H.,et al. Zircon U-Pb ages and Hf isotope compositions of migmatites from the North Qinling terrane and their geological implications[J]. JOURNAL OF METAMORPHIC GEOLOGY,2014,32(2):177-193. |
| APA | Liu, Q..,Wu, Y. -B..,Wang, H..,Gao, S..,Qin, Z. -W..,...&Gong, H. -J..(2014).Zircon U-Pb ages and Hf isotope compositions of migmatites from the North Qinling terrane and their geological implications.JOURNAL OF METAMORPHIC GEOLOGY,32(2),177-193. |
| MLA | Liu, Q.,et al."Zircon U-Pb ages and Hf isotope compositions of migmatites from the North Qinling terrane and their geological implications".JOURNAL OF METAMORPHIC GEOLOGY 32.2(2014):177-193. |
入库方式： OAI收割
来源：地质与地球物理研究所
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