Petrogenesis and tectonic setting of Late Devonian high-Mg andesites in the Beishan orogen, NW China
文献类型：期刊论文
| 作者 | Wang, Guo-Qiang2,3,4; Li, Xiang-Min2,3,4; Yu, Ji-Yuan2,3,4; Bu, Tao3,4; Huang, Bo-Tao4; Liu, Yu-Jie1 |
| 刊名 | GEOLOGICAL MAGAZINE
 |
| 出版日期 | 2021-12-06 |
| 页码 | 16 |
| 关键词 | high-Mg andesites geochemistry petrogenesis tectonic setting Late Devonian Beishan Central Asian Orogenic Belt |
| ISSN号 | 0016-7568 |
| DOI | 10.1017/S0016756821001151 |
| 通讯作者 | Wang, Guo-Qiang(gqwangmint@gmail.com) |
| 英文摘要 | High-Mg andesites (HMAs) are crucial for the reconstruction of plate tectonics, continental margin formation and lithospheric evolution. In this study, we present new fossil age, whole-rock geochemical and Sr-Nd isotope data on the newly discovered Dundunshan Group HMAs in the Dundunshan area of the Beishan orogen (central-southern Central Asian Orogenic Belt). The Dundunshan HMA samples are characterized by high MgO (6.47-7.02 wt%) contents and high Mg-# values (67.27-68.77), with SiO2 (58.57-62.13 wt%), Al2O3 (14.49-16.07 wt%) and CaO (5.05-6.24 wt%) resembling typical HMAs. The Dundunshan HMA samples are calc-alkaline and strongly enriched in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs), with slightly negative Eu anomaly and high-field-strength element (HFSE) depletions. Their (Sr-87/Sr-86)(i) ratios (0.7041-0.7057) and epsilon(Nd(t)) (3.73-5.59) indicate that the Dundunshan HMAs were mainly formed by the interactions between subducted oceanic sediment-derived melts and mantle peridotites. Fossil evidence and published radiometric age data constrain the formation of the Dundunshan HMAs to early Late Devonian time. Sedimentological features of the Middle Devonian Sangejing Formation and regional tectonic correlation suggest that the Hongliuhe-Niujuanzi-Xichangjing Ocean in the Dundunshan area was likely closed during late Middle Devonian time, and that the Dundunshan HMAs were formed in a post-collision extensional setting. |
| WOS关键词 | SETOUCHI VOLCANIC BELT ; ZIRCON U-PB ; NIUJUANZI OPHIOLITIC MELANGE ; PHANEROZOIC CRUSTAL GROWTH ; SOUTHERN TIEN-SHAN ; SLAB-DERIVED MELTS ; A-TYPE GRANITES ; CENTRAL-ASIA ; POSTCOLLISIONAL MAGMATISM ; GEOCHEMICAL EVIDENCE |
| 资助项目 | National Natural Science Foundation for Youth of China[41703038] ; Natural Science Foundation of Shaanxi Province[2015JM4144] ; China Geological Survey Project[DD20190812] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000727554400001 |
| 出版者 | CAMBRIDGE UNIV PRESS |
| 资助机构 | National Natural Science Foundation for Youth of China ; Natural Science Foundation of Shaanxi Province ; China Geological Survey Project |
| 源URL | [http://ir.ieecas.cn/handle/361006/17281]  |
| 专题 | 地球环境研究所_科技外事处 |
| 通讯作者 | Wang, Guo-Qiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China 2.Northwest China Ctr Geosci Innovat, Xian 710054, Shaanxi, Peoples R China 3.China Geol Survey, Ctr Orogen Belt Geol, Xian 710054, Shaanxi, Peoples R China 4.China Geol Survey, Xian Ctr, Xian 710054, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Guo-Qiang,Li, Xiang-Min,Yu, Ji-Yuan,et al. Petrogenesis and tectonic setting of Late Devonian high-Mg andesites in the Beishan orogen, NW China[J]. GEOLOGICAL MAGAZINE,2021:16. |
| APA | Wang, Guo-Qiang,Li, Xiang-Min,Yu, Ji-Yuan,Bu, Tao,Huang, Bo-Tao,&Liu, Yu-Jie.(2021).Petrogenesis and tectonic setting of Late Devonian high-Mg andesites in the Beishan orogen, NW China.GEOLOGICAL MAGAZINE,16. |
| MLA | Wang, Guo-Qiang,et al."Petrogenesis and tectonic setting of Late Devonian high-Mg andesites in the Beishan orogen, NW China".GEOLOGICAL MAGAZINE (2021):16. |
入库方式： OAI收割
来源：地球环境研究所
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