Cogenetic Dykes the Key to Identifying Diverse Magma Batches in the Assembly of Granitic Plutons
文献类型：期刊论文
| 作者 | Guo, Chun-Li1; Wilde, Simon A.2; Henderson, Robert A.3; Li, Qiu-Li4; Yin, Bing5 |
| 刊名 | JOURNAL OF PETROLOGY
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 61期号:11-12页码:24 |
| ISSN号 | 0022-3530 |
| 关键词 | coeval and cogenetic dykes and pluton incrementally assembled pluton zircon Hf-O systematics Qianlishan pluton South China |
| DOI | 10.1093/petrology/egaa105 |
| 英文摘要 | This study demonstrates that dykes that are coeval and cogenetic with plutons can provide an important tool for recognizing discrete batches of magma with similar overall chemical compositions and physical attributes, but different isotopic characteristics, and which contributed to pluton formation. The Qianlishan granitic pluton, located in the Qin-Hang fault zone separating the Yangtze block from the Cathaysia block in South China, was emplaced at 155-152 Ma in the Late Jurassic. It consists of a central zone of strongly differentiated zinnwaldite-bearing equigranular granite surrounded by a less differentiated porphyritic granite. The pluton is spatially associated with an extensive granitic dyke swarm dated here at 153-152 Ma, demonstrating a coeval relationship. Amongst the dykes, two discrete end-member sources can be identified from the bimodal nature of their zircon hafnium and oxygen systematics, with one group showing a range in epsilon(Hf)(t) of -11.9 to -8.0 and in delta O-18 of 9.0-10.4 parts per thousand, whereas in the other group the ranges are from -7.3 to -4.1 and 8.4-9.4 parts per thousand, respectively. This contrasts with the two phases of the Qianlishan pluton, which record wide ranges in epsilon(Hf)(t) of -11.1 to -5.1 and in delta O-18 of 8.3-10.4 parts per thousand, but without bimodality. Hence, the overlapping Hf-O isotopic profiling shows the dykes and pluton to be cogenetic. Small-volume magma batches, with their rapid transport through the crust and quick cooling, are all typical features of dyke generation, thus preserving the original heterogeneous Hf-0 isotopic signatures that are characteristic of two distinct crustal sources. However, although the pluton was formed from similar sources to the dykes, the bimodal source identity was lost during its assembly through mixing of the magma batches. These findings also provide a potential explanation for the wide range of zircon hafnium isotopic systematics typical of granitic plutons, as shown by sampling at all scales. |
| 资助项目 | National Key Research and Development Program of China[2016YFC0600208] ; National Natural Science Foundation of China[41273043] ; National Natural Science Foundation of China[41773028] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000634895900005 |
| 资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101091]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Guo, Chun-Li |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Curtin Univ, Sch Earth & Planetary Sci, Perth, WA 6845, Australia 3.James Cook Univ, Coll Sci & Engn, Econ Geol Res Ctr, Geosci, Townsville, Qld 4811, Australia 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Shizhuyuan Nonferrous Met Liabil Co Ltd, Chenzhou 423037, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Chun-Li,Wilde, Simon A.,Henderson, Robert A.,et al. Cogenetic Dykes the Key to Identifying Diverse Magma Batches in the Assembly of Granitic Plutons[J]. JOURNAL OF PETROLOGY,2020,61(11-12):24. |
| APA | Guo, Chun-Li,Wilde, Simon A.,Henderson, Robert A.,Li, Qiu-Li,&Yin, Bing.(2020).Cogenetic Dykes the Key to Identifying Diverse Magma Batches in the Assembly of Granitic Plutons.JOURNAL OF PETROLOGY,61(11-12),24. |
| MLA | Guo, Chun-Li,et al."Cogenetic Dykes the Key to Identifying Diverse Magma Batches in the Assembly of Granitic Plutons".JOURNAL OF PETROLOGY 61.11-12(2020):24. |
入库方式： OAI收割
来源：地质与地球物理研究所
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