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DOI | 10.1029/2019GL082725 |
Detectability of Remanent Magnetism in the Crust of Venus | |
O&1; 39;Rourke, J. G.2 | |
2019-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:11页码:5768-5777 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Observations of planetary magnetic fields provide fundamental insights into the origin and evolution of terrestrial planets. However, whether Venus ever hosted a dynamo is unknown. Here we show that crustal remanent magnetism is a potentially observable consequence of an ancient Venusian dynamo, in contrast to previous studies that dismissed this possibility. Past spacecraft measurements only exclude crustal magnetization near the Venera 4 landing site and northward of 50 degrees South latitude for >150-km coherence scales and strong magnetization intensities. Magnetite grains with sizes commonly observed in volcanic rocks can retain thermoremanent magnetism at Venusian conditions for >1 billion years. Depths to the Curie temperature of magnetite are similar to 5-40 km and typically less than predicted crustal thicknesses at our analyzed localities. Aerial platforms could detect expected magnetizations at horizontal scales similar to the similar to 50-km operating altitude. Any detection would validate models of planetary accretion, geologic processes, and climate history. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616200016 |
WOS关键词 | GLOBAL DISTRIBUTION ; SOLAR-WIND ; FIELD ; ATMOSPHERE ; VOLCANISM ; SURFACE ; MARS ; CONSTRAINTS ; TOPOGRAPHY ; EVOLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/184080 |
专题 | 气候变化 |
作者单位 | 1.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA; 2.No Arizona Univ, Dept Phys & Astron, Flagstaff, AZ 86011 USA; 3.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 4.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | O&,39;Rourke, J. G.. Detectability of Remanent Magnetism in the Crust of Venus[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(11):5768-5777. |
APA | O&,&39;Rourke, J. G..(2019).Detectability of Remanent Magnetism in the Crust of Venus.GEOPHYSICAL RESEARCH LETTERS,46(11),5768-5777. |
MLA | O&,et al."Detectability of Remanent Magnetism in the Crust of Venus".GEOPHYSICAL RESEARCH LETTERS 46.11(2019):5768-5777. |
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