Recognizing crystal accumulation in plutonic system: Evidence from mafic microgranular enclaves in Early Silurian Qingshan granodiorite, North Qilian Orogenic Belt, NW China
文献类型：期刊论文
| 作者 | Yan, Maoqiang8,9; Li, Guomeng6,7; Shi, Wenjie8; Huizenga, Jan Marten2,3,4,5; Turlin, Francois1; Xu, Chongwen8; Moritz, Robert1; Wei, Junhao8 |
| 刊名 | LITHOS
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 468页码:20 |
| 关键词 | Amphibole Crystal accumulation Cumulate Mafic magmatic enclaves (MMEs) North Qilian Orogenic Belt Continental crust growth |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2024.107518 |
| 通讯作者 | Shi, Wenjie(shiwenjie@cug.edu.cn) ; Wei, Junhao(junhaow@163.com) |
| 英文摘要 | Granitoids are the primary constituents of the continental crust; recognizing and quantifying the effects of crystal accumulation in evolved magmas is a challenging task. Here we present whole-rock chemical, Sr-Nd isotopic, zircon U-Pb geochronological, and Hf isotopic data as well as EPMA and in-situ LA-ICP-MS analyses of amphiboles from Qingshan granodiorite and mafic microgranular enclaves (MMEs) from the North Qilian Orogenic Belt (NQOB). The MMEs and granodiorite have identical crystallisation ages (ca. 434 Ma), the same mineral assemblage, but different mineral modal proportions as the MMEs comprise more amphibole. The MMEs and granodiorite have indistinguishable and depleted zircon Hf (epsilon Hf (t) values of 6.1-8.3, and 6.4-9.1, respectively) and whole-rock Sr-Nd isotopic compositions, i.e. (87Sr/86Sr)i values of 0.70514-0.70913 and 0.70207-0.70552, respectively; and epsilon Nd(t) values of 0.27-2.23 and 0.21-2.39, respectively. The occurrence of idiomorphic amphibole grains, low MREEs and HREEs concentration, low Mg# values of equilibrium melts (AEMs), and decreasing Zr/Hf ratios indicate that Qingshan MMEs represent cumulates formed at a thermal boundary layer between the ascending conduits and the wall rocks. The Qingshan granodiorite was formed by partial melting of subducted oceanic crust with crustal materials during southward subduction of the North Qilian Ocean, followed by further amphibole-dominated fractionation by compaction without crystal deformation. We propose a model of southward subduction with the back-arc basin for the tectonic evolution of the western NQOB. Both the subduction- and collision-related granitoids of the NQOB have played a vital role in continental crust growth. |
| WOS关键词 | CONTINENTAL-CRUST GROWTH ; AMPHIBOLE FRACTIONATION ; SUBDUCTION INITIATION ; FELSIC MAGMATISM ; INTRUSIVE ROCKS ; ARC MAGMATISM ; GANGDESE ARC ; PETROGENESIS ; GRANITES ; GEOCHEMISTRY |
| 资助项目 | National Natural Science Foundation of China[41772071] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001174550600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/184971]  |
| 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 | Shi, Wenjie; Wei, Junhao |
| 作者单位 | 1.Univ Geneva, Dept Earth Sci, CH-1205 Geneva, Switzerland 2.Univ Johannesburg, Dept Geol, POB 524, ZA-2006 Auckland Pk, South Africa 3.James Cook Univ, Coll Sci & Engn, Econ Geol Res Ctr EGRU, Townsville, Qld 4811, Australia 4.Norwegian Univ Life Sci, Nat Resource Management, POB 5003, NO-1432 As, Norway 5.Norwegian Univ Life Sci, Fac Environm Sci, POB 5003, NO-1432 As, Norway 6.Jiangxi Bur Geol, Geol Brigade 1, Nanchang 330052, Jiangxi, Peoples R China 7.Jiangxi Explorat Breakthrough Technol Ctr, Nanchang 330052, Jiangxi, Peoples R China 8.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China 9.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Maoqiang,Li, Guomeng,Shi, Wenjie,et al. Recognizing crystal accumulation in plutonic system: Evidence from mafic microgranular enclaves in Early Silurian Qingshan granodiorite, North Qilian Orogenic Belt, NW China[J]. LITHOS,2024,468:20. |
| APA | Yan, Maoqiang.,Li, Guomeng.,Shi, Wenjie.,Huizenga, Jan Marten.,Turlin, Francois.,...&Wei, Junhao.(2024).Recognizing crystal accumulation in plutonic system: Evidence from mafic microgranular enclaves in Early Silurian Qingshan granodiorite, North Qilian Orogenic Belt, NW China.LITHOS,468,20. |
| MLA | Yan, Maoqiang,et al."Recognizing crystal accumulation in plutonic system: Evidence from mafic microgranular enclaves in Early Silurian Qingshan granodiorite, North Qilian Orogenic Belt, NW China".LITHOS 468(2024):20. |
入库方式： OAI收割
来源：海洋研究所
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