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| DOI | 10.1029/2019GL086126 |
| Venus: A Thick Basal Magma Ocean May Exist Today | |
| O'Rourke J.G. | |
| 发表日期 | 2020 |
| ISSN | 0094-8276 |
| 卷号 | 47期号:4 |
| 英文摘要 | Basal magma oceans develop in Earth and Venus after accretion as their mantles solidify from the middle outward. Fractional crystallization of the basal mantle is buffered by the core and radiogenic and latent heat in the magma ocean. Previous studies showed that Earth's basal magma ocean would have solidified after two or three billion years. Venus has a relatively hot interior that cools slowly in the absence of plate tectonics, which reduces heat flow through the solid mantle. Consequentially, the basal magma ocean could remain as thick as ~200–400 km today. Vigorous convection of liquid silicates could power a global magnetic field until recently while a core-hosted dynamo is suppressed. The basal magma ocean may be a hidden reservoir of potassium and other incompatible elements. A high tidal Love number could reveal a basal magma ocean and would definitively establish that the core is at least partially liquid. ©2020. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | Silicates; Fractional crystallization; Incompatible element; Liquid silicate; Love numbers; Magma ocean; Oceanography; convection; crystallization; Earth; global ocean; heat flow; magma; mantle; plate tectonics; Venus; Calluna vulgaris |
| 语种 | 英语 |
| 来源期刊 | Geophysical Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170678 |
| 作者单位 | School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States |
| 推荐引用方式 GB/T 7714 | O'Rourke J.G.. Venus: A Thick Basal Magma Ocean May Exist Today[J],2020,47(4). |
| APA | O'Rourke J.G..(2020).Venus: A Thick Basal Magma Ocean May Exist Today.Geophysical Research Letters,47(4). |
| MLA | O'Rourke J.G.."Venus: A Thick Basal Magma Ocean May Exist Today".Geophysical Research Letters 47.4(2020). |
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