The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica
文献类型：期刊论文
| 作者 | Liu, Xiaochun1; Fu, Bin3; Li, Qiuli2; Zhao, Yue1; Liu, Jian1; Chen, Hong1 |
| 刊名 | ANTARCTIC SCIENCE
 |
| 出版日期 | 2020-02-01 |
| 卷号 | 32期号:1页码:45-57 |
| 关键词 | hornblende biotite(40)Ar Ar-39 dating isotopic resetting monazite rutile U-Pb dating |
| ISSN号 | 0954-1020 |
| DOI | 10.1017/S0954102019000518 |
| 英文摘要 | This study presents monazite and rutile U-Pb and hornblende and biotite(40)Ar/Ar-39 geochronological data for high-grade rocks of the eastern Grenville-aged Rayner orogen at Mount Brown in order to analyse the extent and degree of Pan-African-aged reworking. Monazite from paragneiss yields U-Pb ages of 910 Ma for larger granular grains and 670-630 Ma for smaller globular beads around garnet porphyroblasts or hosted by symplectites. Rutile from leucogneiss yields U-Pb ages of 520-515 Ma. Hornblende and biotite from different rock types yield(40)Ar/Ar-39 plateau ages of 744 and 520-505 Ma, respectively. Combining these results with published zircon U-Pb age data suggests that granulite facies metamorphism occurred at 910 Ma, with a local low-temperature fluid flow event at 670-630 Ma and thermal reworking at 520-505 Ma. The older age of 744 Ma may reflect cooling or partial resetting of the hornblende(40)Ar/Ar-39 system, indicating that Pan-African-aged reworking did not exceed temperatures much higher than the hornblende Ar closure temperature. These data also suggest that the complete isotopic resetting of some minerals may occur without the growth of new mineral phases, providing an example of the style of reworking that is likely to occur in polymetamorphic terranes. |
| WOS关键词 | PRINCE-CHARLES MOUNTAINS ; T-T PATH ; PRYDZ-BAY ; METAMORPHIC RUTILE ; GROVE MOUNTAINS ; PB DIFFUSION ; RAUER GROUP ; MONAZITE ; GRANULITE ; ZIRCON |
| 资助项目 | National Natural Science Foundation of China[41530209] ; Central Public-Interest Scientific Institution Basal Research Fund[JYYWF201819] ; Geological Investigation Project of the Chinese Geological Survey[DD20190579] |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000578269300007 |
| 出版者 | CAMBRIDGE UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Central Public-Interest Scientific Institution Basal Research Fund ; Central Public-Interest Scientific Institution Basal Research Fund ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Central Public-Interest Scientific Institution Basal Research Fund ; Central Public-Interest Scientific Institution Basal Research Fund ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Central Public-Interest Scientific Institution Basal Research Fund ; Central Public-Interest Scientific Institution Basal Research Fund ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Central Public-Interest Scientific Institution Basal Research Fund ; Central Public-Interest Scientific Institution Basal Research Fund ; Geological Investigation Project of the Chinese Geological Survey ; Geological Investigation Project of the Chinese Geological Survey |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98320]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Liu, Xiaochun |
| 作者单位 | 1.Chinese Acad Geol Sci, Key Lab Paleomagnetism & Tecton Reconstruct, Minist Nat Resources, Inst Geomech, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia |
| 推荐引用方式 GB/T 7714 | Liu, Xiaochun,Fu, Bin,Li, Qiuli,et al. The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica[J]. ANTARCTIC SCIENCE,2020,32(1):45-57. |
| APA | Liu, Xiaochun,Fu, Bin,Li, Qiuli,Zhao, Yue,Liu, Jian,&Chen, Hong.(2020).The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica.ANTARCTIC SCIENCE,32(1),45-57. |
| MLA | Liu, Xiaochun,et al."The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica".ANTARCTIC SCIENCE 32.1(2020):45-57. |
入库方式： OAI收割
来源：地质与地球物理研究所
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