Palaeozoic polymetamorphism in the North Qinling orogenic belt, Central China: Insights from petrology and in situ titanite and zircon U-Pb geochronology
文献类型：期刊论文
| 作者 | Li, Ye1; Zhou, Han-Wen1; Li, Qiu-Li2; Xiang, Hua1,3; Zhong, Zeng-Qiu1; Brouwer, Fraukje M.4 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2014-10-01 |
| 卷号 | 92页码:77-91 |
| 关键词 | North Qinling orogenic belt Songshugou complex Polymetamorphism In situ SIMS titanite U-Pb dating P-T-t path Palaeozoic |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2014.05.023 |
| 文献子类 | Article |
| 英文摘要 | The Qinling orogenic belt experienced multiple phases of orogenesis during the Palaeozoic. Unraveling the timing and P-T conditions of these events is the key to understanding the convergence processes between the South China and the North China Blocks. The Songshugou Complex, located in the southern part of the North Qinling orogenic belt, has registered multistage metamorphism in Palaeozoic, and thus potentially provides insights into the tectonic evolution of the Qinling orogenic belt. In this study, three metabasic rocks (a garnet pyroxenite, a garnet amphibolite and a gneissic amphibolite) from the Songshugou Complex were selected for petrological study and zircon and titanite U-Pb dating. Our results show that the metabasic rocks experienced three metamorphic events during the Palaeozoic. The first metamorphic event (M1) is characterized by high pressure conditions. Two zircon grains in equilibrium with garnet and in absence of plagioclase were recognized from the garnet pyroxenite sample. They yielded Ti-in-zircon temperatures of 660-851 degrees C at similar to 12.0 kbar and a weighted mean age of 498 +/- 15 Ma, providing the constraints on the temperature and timing of prograde or peak metamorphism (M1-1). Zircons that are inequilibrium with garnet from the garnet pyroxenite and the garnet amphibolite gave U-Pb ages of 494 +/- 9 Ma and 484 +/- 4 Ma, and Ti-in-zircon temperatures of 793 +/- 33 degrees C and 738 +/- 18 degrees C, respectively. Thus, these zircons were formed on the retrograde amphibolite-facies conditions at similar to 8.0 kbar (M1-2). Titanite inclusions were found in actinolite cores of zoned amphibole from the garnet amphibolite. They yielded a U-Pb age of similar to 470 Ma and Zr-in-titanite temperature of 676 +/- 23 degrees C at pressure of similar to 7.0 kbar, suggesting that the amphibolite-facies retrogression perhaps persisted to similar to 470 Ma. |
| WOS关键词 | LA-ICP-MS ; ULTRAHIGH-PRESSURE METAMORPHISM ; T-T PATH ; TECTONIC EVOLUTION ; TONGBAI OROGEN ; TRACE-ELEMENTS ; LU-HF ; GEOLOGICAL SIGNIFICANCE ; MINERAL INCLUSIONS ; UHP METAMORPHISM |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000341554100006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China(90814004 ; National Natural Science Foundation of China(90814004 ; Ministry of Land and Resources, PR China(20089939) ; Ministry of Land and Resources, PR China(20089939) ; 41222023) ; 41222023) ; National Natural Science Foundation of China(90814004 ; National Natural Science Foundation of China(90814004 ; Ministry of Land and Resources, PR China(20089939) ; Ministry of Land and Resources, PR China(20089939) ; 41222023) ; 41222023) ; National Natural Science Foundation of China(90814004 ; National Natural Science Foundation of China(90814004 ; Ministry of Land and Resources, PR China(20089939) ; Ministry of Land and Resources, PR China(20089939) ; 41222023) ; 41222023) ; National Natural Science Foundation of China(90814004 ; National Natural Science Foundation of China(90814004 ; Ministry of Land and Resources, PR China(20089939) ; Ministry of Land and Resources, PR China(20089939) ; 41222023) ; 41222023) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86012]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhou, Han-Wen |
| 作者单位 | 1.China Univ Geosci, Fac Earth Sci, State Key Lab Geol Proc & Mineral Res, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 4.Vrije Univ Amsterdam, FALW, Dept Earth Sci, Amsterdam, Netherlands |
| 推荐引用方式 GB/T 7714 | Li, Ye,Zhou, Han-Wen,Li, Qiu-Li,et al. Palaeozoic polymetamorphism in the North Qinling orogenic belt, Central China: Insights from petrology and in situ titanite and zircon U-Pb geochronology[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,92:77-91. |
| APA | Li, Ye,Zhou, Han-Wen,Li, Qiu-Li,Xiang, Hua,Zhong, Zeng-Qiu,&Brouwer, Fraukje M..(2014).Palaeozoic polymetamorphism in the North Qinling orogenic belt, Central China: Insights from petrology and in situ titanite and zircon U-Pb geochronology.JOURNAL OF ASIAN EARTH SCIENCES,92,77-91. |
| MLA | Li, Ye,et al."Palaeozoic polymetamorphism in the North Qinling orogenic belt, Central China: Insights from petrology and in situ titanite and zircon U-Pb geochronology".JOURNAL OF ASIAN EARTH SCIENCES 92(2014):77-91. |
入库方式： OAI收割
来源：地质与地球物理研究所
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