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DOI | 10.1038/s41467-020-16723-6 |
Fossilized solidifications fronts in the Bushveld Complex argues for liquid-dominated magmatic systems | |
Kruger, Willem; Latypov, Rais | |
2020-06-09 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2020 |
卷号 | 11期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | South Africa |
英文摘要 | Chemical differentiation of magma on Earth occurs through physical separation of liquids and crystals. The mechanisms of this separation still remain elusive due to the lack of information on solidification fronts in plutonic magmatic systems. Here, we present records of fossilized solidification fronts from massive magnetitites of the Bushveld Complex in South Africa, obtained by two-dimensional geochemical mapping on field outcrops. The chemical zoning patterns of solidification fronts indicate that nucleation and crystallization occur directly at the chamber floor and result in near-perfect fractionation due to convective removal of a compositional boundary layer from in situ growing crystals. Our data precludes the existence of thick crystal mushes during the formation of massive magnetitites, thus providing no support for the recent paradigm that envisages only crystal-rich and liquid-poor mushy reservoirs in the Earth's crust. Magma storage zones are debated to either be crystal-dominated mush zones or large liquid-dominated magma chambers. Here, the authors discover fossilized solidification fronts of magnetitite in the Bushveld pluton, which indicate nucleation and crystal growth occurred at the magma chamber floor, precluding the existence of a thick crystal mush zone in this region. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000542776400003 |
WOS关键词 | IN-SITU CRYSTALLIZATION ; COMPOSITIONAL CONVECTION ; UPPER ZONE ; CRYSTAL MUSH ; SOUTH-AFRICA ; MAGNETITE ; COMPACTION ; PLAGIOCLASE ; INTRUSION ; DIFFUSION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/274423 |
专题 | 资源环境科学 |
作者单位 | Univ Witwatersrand, Sch Geosci, Johannesburg, South Africa |
推荐引用方式 GB/T 7714 | Kruger, Willem,Latypov, Rais. Fossilized solidifications fronts in the Bushveld Complex argues for liquid-dominated magmatic systems[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Kruger, Willem,&Latypov, Rais.(2020).Fossilized solidifications fronts in the Bushveld Complex argues for liquid-dominated magmatic systems.NATURE COMMUNICATIONS,11(1). |
MLA | Kruger, Willem,et al."Fossilized solidifications fronts in the Bushveld Complex argues for liquid-dominated magmatic systems".NATURE COMMUNICATIONS 11.1(2020). |
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