First boron isotopes in the southern Jilin TTG series uncover a Neoarchean oceanic arc in the eastern North China Craton
文献类型：期刊论文
| 作者 | Liu, Bo2,3,4; Ma, Jingxuan4; Li, Pengfei3 ; Hong, Yangbaihe2; Feng, Wei1
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| 刊名 | GONDWANA RESEARCH
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| 出版日期 | 2025-03-01 |
| 卷号 | 139页码:243-259 |
| 关键词 | B isotopes Neoarchean TTG series Oceanic arc Continental margin arc North China Craton |
| ISSN号 | 1342-937X |
| DOI | 10.1016/j.gr.2024.11.008 |
| 英文摘要 | The Neoarchean evolution of the eastern North China Craton (NCC) is still controversial. This study presents the first B isotopes, together with zircon U-Pb-Hf isotopes and whole-rock geochemical analyses, for the TTG and dioritic series in the Baishan area of the southern Jilin region. LA-ICP-MS zircon U-Pb results uncover the Neoarchean magmatic activities, including granodioritic gneisses (2648 +/- 10 Ma and 2622 +/- 8 Ma), and quartz dioritic gneiss (2539 +/- 7 Ma). The 2.65-2.60 Ga TTG series exhibit intermediate calc-alkaline characteristics, with relatively lower Th/La ratios (0.11-0.41) and positive zircon epsilon Hf(t) values (+3.73 to +7.93), suggesting that the TTG series were likely derived from partial melting of mafic lower crust. By contrast, the 2.54 Ga dioritic series show positive Zr, Hf and Eu anomalies, with relatively lower Nb/Zr ratios (0.013-0.028) and epsilon Hf(t) values (+2.00 to +5.49), indicating that they were possibly produced by mixing of the mantle-derived magma and crustal melts. Importantly, the 2.65-2.60 Ga TTG series are characterized by positive whole-rock delta 11B values of +4.11 to +15.08 %o, resembling the Izu-Bonin-Mariana oceanic arc and South Sandwich Island arc volcanic rocks. The formation of these TTG rocks is attributed to 11B-rich fluids released by subducted oceanic slab and subsequent metasomatism of the subarc mantle wedge. Unlike the oceanic arc TTG series, the 2.54 Ga dioritic series exhibit lighter whole-rock delta 11B values of -4.23 to -4.50 %o, reflecting an arc-continental collision induced by slab breakoff and mantle-derived magma upwelling. Integrated with previous studies, it suggests that the subduction-collision process in the eastern NCC resulted from the co-evolution of oceanic arc and continental margin arc. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001402238400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82579]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Liu, Bo |
| 作者单位 | 1.Jilin Banmiaozi Min Co Ltd, Baishan 134300, Peoples R China 2.Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 4.Northeastern Univ, Coll Resources & Civil Engn, Dept Geol, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Bo,Ma, Jingxuan,Li, Pengfei,et al. First boron isotopes in the southern Jilin TTG series uncover a Neoarchean oceanic arc in the eastern North China Craton[J]. GONDWANA RESEARCH,2025,139:243-259. |
| APA | Liu, Bo,Ma, Jingxuan,Li, Pengfei,Hong, Yangbaihe,&Feng, Wei.(2025).First boron isotopes in the southern Jilin TTG series uncover a Neoarchean oceanic arc in the eastern North China Craton.GONDWANA RESEARCH,139,243-259. |
| MLA | Liu, Bo,et al."First boron isotopes in the southern Jilin TTG series uncover a Neoarchean oceanic arc in the eastern North China Craton".GONDWANA RESEARCH 139(2025):243-259. |
入库方式： OAI收割
来源：广州地球化学研究所
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