Identifying Crystal Accumulation in Granitoids through Amphibole Composition and In Situ Zircon O Isotopes in North Qilian Orogen
文献类型：期刊论文
| 作者 | Chen, Shuo3,4,5; Niu, Yaoling1,2,4; Wang, Xiaohong3,4,5; Xue, Qiqi5; Sun, Wenli6 |
| 刊名 | JOURNAL OF PETROLOGY
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 62期号:12页码:18 |
| 关键词 | amphibole zircon oxygen isotope cumulate granitoids mafic magmatic enclaves (MME) |
| ISSN号 | 0022-3530 |
| DOI | 10.1093/petrology/egab096 |
| 通讯作者 | Chen, Shuo(shuochen@qdio.ac.cn) |
| 英文摘要 | Granitoids are the main constituents of the continental crust, and an understanding of their petrogenesis is key to the origin and evolution of continents. Whether crystal fractionation is the dominant way to generate evolved magmas has long been debated, mostly because such processes would produce large volumes of complementary cumulates, which remains elusive. Mafic magmatic enclaves (MMEs) are ubiquitous in granitoids and their presence was initially recognized as cumulates. However, because many MMEs lack obvious evidence of accumulation, such as the classic cumulate textures and modal layering, the cumulate origin of MMEs has been abandoned and the model of magma mixing between mafic and felsic magmas has become popular. In this study, we conduct a combined study of amphibole composition and in situ O isotopes in zircons on three suites of orogenic granitoids with MMEs from the North Qilian Orogenic Belt (NQOB). We find that the MMEs and their host granodiorites show overlapping zircon delta O-18 values, affirming that they share the same parental magmas. The amphibole compositions indicate that amphiboles from the MMEs are not in equilibrium with a melt whose composition was that of the bulk-rock. These new data, together with the published bulk-rock data, suggest that the MMEs in our study have clear cumulate signatures and are thus of cumulate origin. Our study provides evidence for crystal accumulation in granitoids in the NQOB. This new understanding calls for re-examination on the petrogenesis of some intermediate magmatic rocks (granitoid/andesite) in discussing models of continental crustal growth. |
| 资助项目 | National Natural Science Foundation (NSFC)[41906050] ; National Natural Science Foundation (NSFC)[41630968] ; National Natural Science Foundation (NSFC)[91958215] ; China Postdoctoral Science Foundation[2019 M652496] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606401] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2021206] ; 111 project[B18048] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000745055500017 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/177732]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Chen, Shuo |
| 作者单位 | 1.China Univ Geosci, Beijing 100083, Peoples R China 2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 6.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Shuo,Niu, Yaoling,Wang, Xiaohong,et al. Identifying Crystal Accumulation in Granitoids through Amphibole Composition and In Situ Zircon O Isotopes in North Qilian Orogen[J]. JOURNAL OF PETROLOGY,2021,62(12):18. |
| APA | Chen, Shuo,Niu, Yaoling,Wang, Xiaohong,Xue, Qiqi,&Sun, Wenli.(2021).Identifying Crystal Accumulation in Granitoids through Amphibole Composition and In Situ Zircon O Isotopes in North Qilian Orogen.JOURNAL OF PETROLOGY,62(12),18. |
| MLA | Chen, Shuo,et al."Identifying Crystal Accumulation in Granitoids through Amphibole Composition and In Situ Zircon O Isotopes in North Qilian Orogen".JOURNAL OF PETROLOGY 62.12(2021):18. |
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。