Subduction-induced crustal growth in the Neoproterozoic continental magmatic arc: Evidence from arc-type high-Mg# diorites and adakitic granitoids in the western Yangtze Block, South China
文献类型：期刊论文
| 作者 | Liu, Rui-Yang1; Lai, Shao-cong1; Zhu, Yu3,4; Zhu, Ren-Zhi1; Liu, Min1; Qin, Jiang-Feng1; Zhang, Fang-yi2; Yang, Hang1 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2025-09-15 |
| 卷号 | 428页码:23 |
| 关键词 | Arc-type high-Mg-# diorites Adakitic granitoids Western Yangtze Block Neoproterozoic Subduction-induced crustal growth |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2025.107892 |
| 通讯作者 | Lai, Shao-cong(shaocong@nwu.edu.cn) ; Zhu, Yu(yuzhunwu@163.com) |
| 英文摘要 | The coexistence of normal arc-type mafic-intermediate rocks and adakitic granodiorites can provide significant insights into the subduction-induced crustal growth. In this study, we present the comprehensive study of petrology, mineralogy, zircon U-Pb geochronology, bulk rock major and trace elements, Sr-Nd isotopes, zircon Lu-Hf isotopes, and electron microprobe (plagioclase, amphibole, biotite, and clinopyroxene) for the newly identified Neoproterozoic high-Mg-# diorites (HMA) and adakitic granodiorites from the Kangding area along the western margin of the Yangtze Block (South China), to explore the subduction-induced crustal growth in the Neoproterozoic continental arc magma. The results show that the high-Mg-# diorites formed at 792.9 Ma, and have much andesines, labradorites, high magnesium biotites and iron hornblendes, and are characterized by variably high MgO (3.62 similar to 5.82 wt%) contents and Mg-# (58.36 similar to 60.49) values, showing the positive bulk rock epsilon Nd(t) (+0.84 similar to +2.19) and zircon epsilon(Hf)(t) (+4.18 similar to +9.44) values. The adakitic granodiorites formed at 793.5 Ma, and have much mineral of quartz, plagioclase, biotite as well as minor pyroxene and iron calcium magnesium amphibole. They contain high Sr (463.14 similar to 494.44 ppm) and Y (10.41 similar to 13.81 ppm) contents as well as Sr/Y (35.69 similar to 47.49) ratios, indicating the adakitic dffinity. Theses adakitic granodiorites display positive epsilon(Nd)(t) (+1.52 similar to +1.83) and zircon epsilon(Hf)(t) (+3.45 similar to +7.14) values. Both types of rocks are enriched in LREEs (Light rare earth elements) and LILEs (Large ion lithophile elements) and depleted in Nb, Ta and Ti. We suggest that these high-Mg-# diorites were derived from the partial melting of metasomatized mantle source enriched by subduction-related fluids, and the adakitic granodiorites were formed by partial melting of thickened juvenile mafic lower crust, which can reveal the subduction-induced crustal growth. Combined with 860 similar to 780 Ma mafic-intermediate-felsic rocks and 800 similar to 750 Ma adakitic granitoids, we support that the Neoproterozoicc crustal growth were induced by metasomatized mantle-derived magmas. The subduction-induced crustal growth is vital for moulding the geochemical characteristics of arc magmatic rock types. |
| WOS关键词 | U-PB AGE ; LA-ICP-MS ; TRACE-ELEMENT ; ISOTOPIC CONSTRAINTS ; TIBET IMPLICATIONS ; LU-HF ; OROGENIC BELT ; SW CHINA ; ZIRCON ; ROCKS |
| 资助项目 | National Natural Science Foundation of China[42202048] ; National Natural Science Foundation of China[42172056] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001583557200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203497]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Lai, Shao-cong; Zhu, Yu |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Evolut & Early Life, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Yangtze Univ, Coll Resources & Environm, YU CUGW Joint Res Ctr Deep Earth & Surface Dynam C, Wuhan 430100, Peoples R China 4.Yangtze Univ, Coll Resources & Environm, Hubei Key Lab Petr Geochem & Environm, Wuhan 430100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Rui-Yang,Lai, Shao-cong,Zhu, Yu,et al. Subduction-induced crustal growth in the Neoproterozoic continental magmatic arc: Evidence from arc-type high-Mg# diorites and adakitic granitoids in the western Yangtze Block, South China[J]. PRECAMBRIAN RESEARCH,2025,428:23. |
| APA | Liu, Rui-Yang.,Lai, Shao-cong.,Zhu, Yu.,Zhu, Ren-Zhi.,Liu, Min.,...&Yang, Hang.(2025).Subduction-induced crustal growth in the Neoproterozoic continental magmatic arc: Evidence from arc-type high-Mg# diorites and adakitic granitoids in the western Yangtze Block, South China.PRECAMBRIAN RESEARCH,428,23. |
| MLA | Liu, Rui-Yang,et al."Subduction-induced crustal growth in the Neoproterozoic continental magmatic arc: Evidence from arc-type high-Mg# diorites and adakitic granitoids in the western Yangtze Block, South China".PRECAMBRIAN RESEARCH 428(2025):23. |
入库方式： OAI收割
来源：海洋研究所
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