Wet calc-alkaline magmatic fractionation in the middle-upper crustal sections of the continental arc: Insights from the Neoproterozoic Nanba intrusive complex, western Yangtze Block, South China
文献类型：期刊论文
| 作者 | Zhu, Yu4; Lai, Shao-cong4; Xie, Wan-li4; Qin, Jiang-feng4; Zhu, Ren-zhi4; Zhao, Shao-wei3; Liu, Min4; Zhang, Fang-yi2,4; Zhang, Ze-zhong1,4; Yang, Hang4 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 136期号:3-4页码:928-948 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36786.1 |
| 通讯作者 | Zhu, Yu(yuzhunwu@163.com) |
| 英文摘要 | Elucidating the petrological and geochemical characteristics of continental arc crustal fragments can provide unique insights into the magmatic evolutional path and physicochemical conditions (e.g., P-T-H2O) of continental magmatic arcs. This contribution provides a comprehensive set of petrological, mineralogical, geochronological, and geochemical data for the Neoproterozoic Nanba intrusive complex of the western Yangtze Block, South China, which features wellexposed middle-upper crustal sections of the Neoproterozoic continental magmatic arc, to evaluate their magmatic source and fractionation process. The Neoproterozoic Nanba intrusive complex, composed of cumulate gabbros, hornblende gabbros, gabbro -diorites, diorites, granodiorites, K -feldspar granites, and monzogranites, was emplaced at ca. 796-790 Ma. The different lithologies of the Nanba intrusive complex display relatively homogeneous Sr-Nd-Hf isotopes, which indicates a cogenetic evolutional process. The predominantly depleted isotopic characteristics, together with high values of Ba, Rb/Y, and Ba/La, demonstrate that these rocks mainly originated from a subduction fluid-metasomatized mantle source. Petrological and geochemical characteristics, as well as hornblende thermobarometric data, collectively support that the ca. 796-790 Ma Nanba intrusive complex, following the calc-alkaline trend, was dominated by the wet cogenetic fractionation of hornblende accompanied by plagioclase and accessory minerals beneath the middle-upper crustal levels (2.4-4.7 kbar). The cumulate gabbros represent the residue of accumulated hornblende + plagioclase + Fe -Ti oxides from fractionated basaltic melts. The high-SiO2 Kfeldspar granites and monzogranites display complementary trace elements, which represent residual silicic cumulates and extracted interstitial liquids in the shallower crystal mush reservoir, respectively. In combination with previous studies, we propose that the middle-upper crustal sections of the Neoproterozoic continental arc of the western Yangtze Block underwent hornblende -dominated fractionation that was followed by significant crystal -liquid separation, which led to the genesis of high-SiO2 melts at the shallower crustal level. The cogenetic evolution played a significant role in molding the petrological and geochemical diversity of Neoproterozoic igneous rocks and the differentiation process of continental arc crust in the western Yangtze Block. |
| WOS关键词 | U-PB AGE ; HF ISOTOPIC CONSTRAINTS ; A-TYPE GRANITES ; I-TYPE GRANITES ; SW CHINA ; SICHUAN PROVINCE ; TRACE-ELEMENT ; LU-HF ; VOLCANIC-ROCKS ; SILICA-RICH |
| 资助项目 | National Natural Science Foundation of China[42202048] ; National Natural Science Foundation of China[42172056] ; China Postdoctoral Science Foundation[2021M702647] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001190358900002 |
| 出版者 | GEOLOGICAL SOC AMER, INC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/185088]  |
| 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 | Zhu, Yu |
| 作者单位 | 1.China Three Gorges Corp, Shanghai Invest Design & Res Inst Co Ltd, Shanghai 200335, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Changan Univ, Sch Earth Sci & Resources, Key Lab Western Chinas Mineral Resources & Geol En, Minist Educ, Xian 710054, Peoples R China 4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Yu,Lai, Shao-cong,Xie, Wan-li,et al. Wet calc-alkaline magmatic fractionation in the middle-upper crustal sections of the continental arc: Insights from the Neoproterozoic Nanba intrusive complex, western Yangtze Block, South China[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(3-4):928-948. |
| APA | Zhu, Yu.,Lai, Shao-cong.,Xie, Wan-li.,Qin, Jiang-feng.,Zhu, Ren-zhi.,...&Yang, Hang.(2024).Wet calc-alkaline magmatic fractionation in the middle-upper crustal sections of the continental arc: Insights from the Neoproterozoic Nanba intrusive complex, western Yangtze Block, South China.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(3-4),928-948. |
| MLA | Zhu, Yu,et al."Wet calc-alkaline magmatic fractionation in the middle-upper crustal sections of the continental arc: Insights from the Neoproterozoic Nanba intrusive complex, western Yangtze Block, South China".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.3-4(2024):928-948. |
入库方式： OAI收割
来源：海洋研究所
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。