Geochemistry of Late Palaeoproterozoic (1.69 Ga) A-type Mayong granitoids in Shillong Plateau, north-east India: Implication for anorogenic magmatism during Columbia Supercontinent cycle
文献类型：期刊论文
| 作者 | Doley, Dimple2; Bhagabaty, Balen2; Sarma, Gautam2; Singh, Athokapm Krishnakanta3; Zou, Xinyu1 |
| 刊名 | GEOLOGICAL JOURNAL
 |
| 出版日期 | 2021-10-26 |
| 页码 | 19 |
| 关键词 | geochemistry granitoids Mayong north-east India Palaeoproterozoic Shillong Plateau U-Pb ages |
| ISSN号 | 0072-1050 |
| DOI | 10.1002/gj.4303 |
| 英文摘要 | The Late Palaeoproterozoic Mayong granitoids of Assam constitute an important component of the continental crust and the Basement Gneissic Complex in the northern extension of the Shillong Plateau, north-east India. The basement rocks of Shillong Plateau are considered as a continuation of the Central Indian Tectonic Zone. In this study, emphasis is given on the new zircon U-Pb age, Hf isotopic composition, and the tectonic implication of Late Palaeoproterozoic Mayong granitoids. The Mayong granitoids are essentially composed of quartz-K-feldspar-plagioclase-biotite-hornblende as major minerals and titanite-zircon-allanite-bastnaesite-apatite-ilmenite as the accessory mineral phase. They show typical geochemical characteristics of A-type granites, such as high silica (average 71.86 wt%), alkalies (average 8.01 wt%), Rb, Zr, Nb, Ga, and rare earth elements (except Eu); high FeOt/MgO and Ga/Al ratios, and low CaO, MgO, Ba, Sr, P, Eu, and Ti concentrations. Laser ablation inductively coupled plasma mass spectrometry zircon U-Pb dating indicates that they were emplaced at similar to 1,687 +/- 35 Ma during the large-scale magmatism of Late Palaeoproterozoic to Early Mesoproterozoic periods. Their zircon Hf model (T-DM2) ages (1,833-2,257 Ma) in conjunction with trace elemental characteristics suggest that they were generated by the reworking/recycling of Early Palaeoproterozoic crust in an intraplate extensional tectonic environment. Thus, we conclude that these A-type Late Palaeoproterozoic Mayong granitoids of the Shillong Plateau probably have a close genetic linkage with the magmatic event of the Columbia Supercontinent cycle during 1,687 +/- 35 Ma. |
| WOS关键词 | U-PB ISOTOPE ; PALEO-MESOPROTEROZOIC SUPERCONTINENT ; CHINA CRATON IMPLICATIONS ; ZIRCON LU-HF ; TECTONIC ZONE ; MEGHALAYA PLATEAU ; ARAVALLI OROGEN ; MAHAKOSHAL BELT ; KARBI HILLS ; NW INDIA |
| 资助项目 | University Grant Commission |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000711228600001 |
| 出版者 | WILEY |
| 资助机构 | University Grant Commission ; University Grant Commission ; University Grant Commission ; University Grant Commission ; University Grant Commission ; University Grant Commission ; University Grant Commission ; University Grant Commission |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103006]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Bhagabaty, Balen |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Gauhati Univ, Dept Geol Sci, Gauhati 781014, Assam, India 3.Wadia Inst Himalayan Geol, ICP MS Lab, Petrol & Geochem Grp, Dehra Dun 248001, Uttarakhand, India |
| 推荐引用方式 GB/T 7714 | Doley, Dimple,Bhagabaty, Balen,Sarma, Gautam,et al. Geochemistry of Late Palaeoproterozoic (1.69 Ga) A-type Mayong granitoids in Shillong Plateau, north-east India: Implication for anorogenic magmatism during Columbia Supercontinent cycle[J]. GEOLOGICAL JOURNAL,2021:19. |
| APA | Doley, Dimple,Bhagabaty, Balen,Sarma, Gautam,Singh, Athokapm Krishnakanta,&Zou, Xinyu.(2021).Geochemistry of Late Palaeoproterozoic (1.69 Ga) A-type Mayong granitoids in Shillong Plateau, north-east India: Implication for anorogenic magmatism during Columbia Supercontinent cycle.GEOLOGICAL JOURNAL,19. |
| MLA | Doley, Dimple,et al."Geochemistry of Late Palaeoproterozoic (1.69 Ga) A-type Mayong granitoids in Shillong Plateau, north-east India: Implication for anorogenic magmatism during Columbia Supercontinent cycle".GEOLOGICAL JOURNAL (2021):19. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。