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| Petrogenetic evolution of the Zhuopan potassic alkaline complex, western Yunnan, SW China: Implications for heterogeneous metasomatism of lithospheric mantle beneath Simao and western Yangtze block | |
| Miao, Zhuang1,2; Zhao, Zhidan1,2; Niu, Yaoling1,2,3,4; Lei, Hangshan1,2; Tong, Xin1,2; Wu, Jingkai1,2; Yang, Yiyun1,2; Liu, Dong1,2; Wang, Qing1,2; Zhu, Di-Cheng1,2; Dong, Guochen1,2; Zhou, Su1,2 | |
| 2021-11-01 | |
| 发表期刊 | LITHOS
 |
| ISSN | 0024-4937 |
| 卷号 | 400页码:18 |
| 通讯作者 | Zhao, Zhidan(zdzhao@cugb.edu.cn) |
| 摘要 | Potassic alkaline rocks are instrumental in unveiling the composition and geodynamic evolution of mantle lithosphere. The Zhuopan alkaline complex, located in the western Simao block, SW China, exhibits features of high potassium, enrichment in LILEs, and depletion in HFSEs. These same elemental features and Sr-Nd isotopic compositions are also evident in the coeval clinopyroxenitic and syenitic rocks, indicating a comagmatic origin. In this paper, we present new data and discuss the petrogenesis of these rocks. We show that magmas parental to the Zhuopan alkaline complex are derived from highly enriched clinopyroxene-rich lithospheric mantle. These alkaline magmas emplaced in shallow crustal level and experienced crustal assimilation during ascent and through magma chamber processes. Pyroxenite is of cumulitic origin dominated by clinopyroxene and apatite. It formed at an early stage and received more effective crustal contamination. Pyroxene syenite, syenite and nepheline syenite are compositional mixture of variably evolved melt with incompletely segregated liquidus phases (e.g., clinopyroxene, biotite, alkali-feldspar, apatite, nepheline). An important observation is that the Dy/ Yb ratio, LILE and LREE abundances of the Zhuopan complex are significantly higher than those of the contemporaneous mafic volcanic rocks in the western Yangtze block, reflecting different sources and source histories. The lithospheric mantle beneath Simao and western Yangtze blocks must have been heterogeneously metasomatized by oceanic subduction-related fluids and melts. Particularly, the mantle source for the Zhuopan alkaline rocks exhibits feature of carbonatite metasomatism. This is further supported by our modeling where melts derived from marine carbonate play a crucial role. |
| 关键词 | Alkaline complex Enriched lithospheric mantle Heterogeneous metasomatism Zhuopan complex Western Yunnan |
| DOI | 10.1016/j.lithos.2021.106354 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0702] ; National Key Research and Development Project of China[2016YFC0600304] ; Natural Science Foundation of China[41802058] ; Fundamental Research Funds for the Central Universities[2652018122] ; Fundamental Research Funds for the Central Universities[QZ05201902] ; 111 Project of the Ministry of Science and Technology of China[BP0719021] ; 111 Project of the Ministry of Science and Technology of China[B18048] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| WOS类目 | Geochemistry & Geophysics ; Mineralogy |
| WOS记录号 | WOS:000702535400001 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/176527 |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Zhao, Zhidan |
| 作者单位 | 1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Univ Durham, Dept Earth Sci, Durham HD1 3LE, England |
| 推荐引用方式 GB/T 7714 | Miao, Zhuang,Zhao, Zhidan,Niu, Yaoling,et al. Petrogenetic evolution of the Zhuopan potassic alkaline complex, western Yunnan, SW China: Implications for heterogeneous metasomatism of lithospheric mantle beneath Simao and western Yangtze block[J]. LITHOS,2021,400:18. |
| APA | Miao, Zhuang.,Zhao, Zhidan.,Niu, Yaoling.,Lei, Hangshan.,Tong, Xin.,...&Zhou, Su.(2021).Petrogenetic evolution of the Zhuopan potassic alkaline complex, western Yunnan, SW China: Implications for heterogeneous metasomatism of lithospheric mantle beneath Simao and western Yangtze block.LITHOS,400,18. |
| MLA | Miao, Zhuang,et al."Petrogenetic evolution of the Zhuopan potassic alkaline complex, western Yunnan, SW China: Implications for heterogeneous metasomatism of lithospheric mantle beneath Simao and western Yangtze block".LITHOS 400(2021):18. |
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