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DOI | 10.1029/2019GL082427 |
Reiner Gamma: A Magnetized Elliptical Disk on the Moon | |
Garrick-Bethell, Ian1,2; Kelley, Megan R.1 | |
2019-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:10页码:5065-5074 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; South Korea |
英文摘要 | The geologic origin of the Moon's crustal magnetic anomalies is unknown. Reiner Gamma is one of the most studied anomalies, and it is correlated with symmetric bright albedo markings known as swirls. Here we propose that its source magnetization arises from a uniformly magnetized elliptical disk, resulting from the melt sheet or floor deposits of an oblique impact crater. The magnetization was likely acquired in a dynamo field and may be as high as similar to 70 A/m, perhaps due to incorporation of impactor materials. The disk produces vertical fields at its edges that may channel solar wind flux to the surface, producing an elliptical dark region, while neighboring regions remain shielded and bright. Interestingly, the disk appears to be magnetized along its semiminor axis. Measurements of the low altitude magnetic field at Reiner Gamma would test these predictions and help answer additional questions about its interaction with the solar wind. Plain Language Summary We propose that the source of the Moon's Reiner Gamma magnetic anomaly is a magnetized elliptical disk. The disk may be the melt sheet or floor deposits of an elliptical crater, produced by a highly oblique impact. The melt sheet incorporated highly magnetic material from the impactor and cooled in the presence of a dynamo field. This model can explain some of the elliptical dark and bright optical patterns observed on the soil at Reiner Gamma. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471237500007 |
WOS关键词 | OBLIQUE IMPACTS ; LUNAR DYNAMO ; ANOMALIES ; CRATERS ; GRAVITY ; ORIGIN ; CRUST |
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/183370 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Santa Cruz, Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 2.Kyung Hee Univ, Sch Space Res, Yongin, South Korea |
推荐引用方式 GB/T 7714 | Garrick-Bethell, Ian,Kelley, Megan R.. Reiner Gamma: A Magnetized Elliptical Disk on the Moon[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(10):5065-5074. |
APA | Garrick-Bethell, Ian,&Kelley, Megan R..(2019).Reiner Gamma: A Magnetized Elliptical Disk on the Moon.GEOPHYSICAL RESEARCH LETTERS,46(10),5065-5074. |
MLA | Garrick-Bethell, Ian,et al."Reiner Gamma: A Magnetized Elliptical Disk on the Moon".GEOPHYSICAL RESEARCH LETTERS 46.10(2019):5065-5074. |
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