Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078126 |
A Possible Second Large Subglacial Impact Crater in Northwest Greenland | |
MacGregor, Joseph A.1; Bottke, William F., Jr.2; Fahnestock, Mark A.3; Harbeck, Jeremy P.1,4; Kjaer, Kurt H.5; Paden, John D.6; Stillman, David E.2; Studinger, Michael1 | |
2019-02-16 | |
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:3页码:1496-1504 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Denmark |
英文摘要 | Following the discovery of the Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, we explored satellite and aerogeophysical data in search of additional such craters. Here we report the discovery of a possible second subglacial impact crater that is 36.5-km wide and 183 km southeast of the Hiawatha impact crater. Although buried by 2 km of ice, the structure's rim induces a conspicuously circular surface expression, it possesses a central uplift, and it causes a negative gravity anomaly. The existence of two closely spaced and similarly sized complex craters raises the possibility that they formed during related impact events. However, the second structure's morphology is shallower, its overlying ice is conformal and older, and such an event can be explained by chance. We conclude that the identified structure is very likely an impact crater, but it is unlikely to be a twin of the Hiawatha impact crater. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462072800042 |
WOS关键词 | ICE-SHEET ; ASTEROID IMPACT ; BENEATH ; GLACIER ; EARTH ; SURFACE ; ORIGIN ; ANTARCTICA ; EROSION ; BED |
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/181368 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Code 916, Greenbelt, MD 20771 USA; 2.Southwest Res Inst, Dept Space Studies, Boulder, CO USA; 3.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA; 4.ADNET Syst Inc, Lanham, MD USA; 5.Univ Copenhagen, Nat Hist Museum, Ctr GeoGenet, Copenhagen, Denmark; 6.Univ Kansas, Ctr Remote Sensing Ice Sheets, Lawrence, KS 66045 USA |
推荐引用方式 GB/T 7714 | MacGregor, Joseph A.,Bottke, William F., Jr.,Fahnestock, Mark A.,et al. A Possible Second Large Subglacial Impact Crater in Northwest Greenland[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(3):1496-1504. |
APA | MacGregor, Joseph A..,Bottke, William F., Jr..,Fahnestock, Mark A..,Harbeck, Jeremy P..,Kjaer, Kurt H..,...&Studinger, Michael.(2019).A Possible Second Large Subglacial Impact Crater in Northwest Greenland.GEOPHYSICAL RESEARCH LETTERS,46(3),1496-1504. |
MLA | MacGregor, Joseph A.,et al."A Possible Second Large Subglacial Impact Crater in Northwest Greenland".GEOPHYSICAL RESEARCH LETTERS 46.3(2019):1496-1504. |
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