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DOI: 10.1002/2015GL065022
论文题名:
The fractured Moon: Production and saturation of porosity in the lunar highlands from impact cratering
作者: Soderblom J.M.; Evans A.J.; Johnson B.C.; Melosh H.J.; Miljkovic K.; Phillips R.J.; Andrews-Hanna J.C.; Bierson C.J.; Head J.W.; Milbury C.; Neumann G.A.; Nimmo F.; Smith D.E.; Solomon S.C.; Sori M.M.; Wieczorek M.A.; Zuber M.T.
刊名: Geophysical Research Letters
ISSN: 0094-9550
EISSN: 1944-9281
出版年: 2015
卷: 42, 期:17
起始页码: 6939
结束页码: 6944
语种: 英语
英文关键词: crustal porosity ; GRAIL ; Gravity Recovery and Interior Laboratory ; Impact cratering ; Moon
Scopus关键词: Geomorphology ; Porosity ; Bouguer anomaly ; Complex craters ; Crater diameter ; GRAIL ; Impact cratering ; Lunar surface ; Overburden pressures ; Pore collapse ; Moon ; crater ; cratering ; GRAIL ; Moon ; porosity ; upland region ; viscoelastic fluid
英文摘要: We have analyzed the Bouguer anomaly (BA) of ∼1200 complex craters in the lunar highlands from Gravity Recovery and Interior Laboratory observations. The BA of these craters is generally negative, though positive BA values are observed, particularly for smaller craters. Crater BA values scale inversely with crater diameter, quantifying how larger impacts produce more extensive fracturing and dilatant bulking. The Bouguer anomaly of craters larger than 93-19+47 km in diameter is independent of crater size, indicating that there is a limiting depth to impact-generated porosity, presumably from pore collapse associated with either overburden pressure or viscous flow. Impact-generated porosity of the bulk lunar crust is likely in a state of equilibrium for craters smaller than ∼30 km in diameter, consistent with an ∼8 km thick lunar megaregolith, whereas the gravity signature of larger craters is still preserved and provides new insight into the cratering record of even the oldest lunar surfaces. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943348830&doi=10.1002%2f2015GL065022&partnerID=40&md5=cc2db66b78ea28dd822a7cb38a9c6349
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9165
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States

Recommended Citation:
Soderblom J.M.,Evans A.J.,Johnson B.C.,et al. The fractured Moon: Production and saturation of porosity in the lunar highlands from impact cratering[J]. Geophysical Research Letters,2015-01-01,42(17).
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