Study on peak metamorphism conditions and zircons U-Pb chronology in the "low-grade metamorphism" belt: Foziling Group, Beihuaiyang metamorphic unit
文献类型：期刊论文
| 作者 | Zhao JunXian4; Shi YongHong4; Tang Hu2,3; Li QiuLi2,3; Hou ZhenHui1; Zhou Tian2,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2019 |
| 卷号 | 35期号:7页码:2219-2236 |
| ISSN号 | 1000-0569 |
| 关键词 | Foziling Group P-T conditions Garnet mica schist Zircon U-Pb dating |
| DOI | 10.18654/1000-0569/2019.07.17 |
| 英文摘要 | The Foziling Group (FZG) is an important component of the Beihuaiyang metamorphic unit in the northernmost margin of the Dabie collisional orogenic belt, and is located in the crucial position between the Yangtze and North China plates. For a long time, the FZG has been regarded as the sedimentary product of the northern margin of the Yangtze Plate as an accretionary wedge. However, the disputes on the tectonic attribute and dynamic formation mechanism of the FZG are incessancy due to the different viewpoints from studies of its geochronology and structural geology. The reason for this situation lies on the lack of the accurate appraise for the metamorphic attribution of the FZG. In this study, detailed fieldworks and regional metamorphic investigations on the FZG, together with abundant analysis of its metamorphic petrology, thermodynamic characteristics and geochronological dating have been carried out. The result indicates that the FZG is mainly lithologically composed of fine-grained mica-quartz schists, quartz-mica schists and garnet mica schists. The estimates of the main metamorphic P-T conditions of the FZG show that it has metamorphosed in a middle-high pressure amphibolite facies with a P-T range of 610 similar to 620 degrees C and 0. 9 similar to 1. 0GPa, respectively, and it should not be the lower'-grade metamorphic unit. which demonstrates that the FZG might be involved into the process of subduction and exhumation in the deeper level. On the basis of zircon U-Pb dating, a large age range of 3101 +/- 48Ma similar to 413 +/- 9Ma has been gained for the FZG, which can be divided into 5 groups with the peak age values of 2537Ma, 1567Ma, 940Ma, 749Ma and 440Ma, respectively. These peak ages imply that the FZG has a mixture source from North China and Yangtze plates, and the youngest peak age suggests that the FZG has been formed in late Early Paleozoic. |
| WOS关键词 | DABIE MOUNTAINS ; SOUTH CHINA ; CONTINENTAL-CRUST ; YANGTZE CRATON ; OROGENIC BELT ; SM-ND ; ROCKS ; ECLOGITES ; EVOLUTION ; NORTH |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000491151100017 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93886]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Shi YongHong |
| 作者单位 | 1.Univ Sci & Technol China, Hefei 230009, Anhui, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Hefei Univ Technol, Coll Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao JunXian,Shi YongHong,Tang Hu,et al. Study on peak metamorphism conditions and zircons U-Pb chronology in the "low-grade metamorphism" belt: Foziling Group, Beihuaiyang metamorphic unit[J]. ACTA PETROLOGICA SINICA,2019,35(7):2219-2236. |
| APA | Zhao JunXian,Shi YongHong,Tang Hu,Li QiuLi,Hou ZhenHui,&Zhou Tian.(2019).Study on peak metamorphism conditions and zircons U-Pb chronology in the "low-grade metamorphism" belt: Foziling Group, Beihuaiyang metamorphic unit.ACTA PETROLOGICA SINICA,35(7),2219-2236. |
| MLA | Zhao JunXian,et al."Study on peak metamorphism conditions and zircons U-Pb chronology in the "low-grade metamorphism" belt: Foziling Group, Beihuaiyang metamorphic unit".ACTA PETROLOGICA SINICA 35.7(2019):2219-2236. |
入库方式： OAI收割
来源：地质与地球物理研究所
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