DOI: 10.1002/2014GL059378
论文题名: Global characteristics of porosity and density stratification within the lunar crust from GRAIL gravity and Lunar Orbiter Laser Altimeter topography data
作者: Han S.-C. ; Schmerr N. ; Neumann G. ; Holmes S.
刊名: Geophysical Research Letters
ISSN: 0094-10254
EISSN: 1944-9985
出版年: 2014
卷: 41, 期: 6 起始页码: 1882
结束页码: 1889
语种: 英语
英文关键词: density
; GRAIL gravity
; LOLA topography
; lunar crust
; porosity
Scopus关键词: Aneroid altimeters
; Density (specific gravity)
; Metamorphic rocks
; Porosity
; Topography
; Charac-teristics of porosities
; Compaction models
; Density stratification
; Frequency-dependent
; Lithostatic pressure
; Lunar crusts
; Model and analysis
; Overburden pressures
; Planetary surface analysis
; altimeter
; compaction
; data set
; gravity field
; lunar crust
; numerical model
; porosity
; regolith
; satellite mission
; topographic mapping
英文摘要: The Gravity Recovery and Interior Laboratory (GRAIL) mission is providing unprecedentedly high-resolution gravity data. The gravity signal in relation to topography decreases from 100 km to 30 km wavelength, equivalent to a uniform crustal density of 2450 kg/m3 that is 100 kg/m3 smaller than the density required at 100 km. To explain such frequency-dependent behavior, we introduce rock compaction models under lithostatic pressure that yield radially stratified porosity (and thus density) and examine the depth extent of porosity. Our modeling and analysis support the assertion that the crustal density must vary from surface to deep crust by up to 500 kg/m 3. We found that the surface density of megaregolith is around 2400 kg/m3 with an initial porosity of 10-20%, and this porosity is eliminated at 10-20 km depth due to lithostatic overburden pressure. Our stratified density models provide improved fits to both GRAIL primary and extended mission data. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896588406&doi=10.1002%2f2014GL059378&partnerID=40&md5=a70dfa072f4e067e5825a3ba75c3e692
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7518
Appears in Collections: 气候减缓与适应
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作者单位: Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Han S.-C.,Schmerr N.,Neumann G.,et al. Global characteristics of porosity and density stratification within the lunar crust from GRAIL gravity and Lunar Orbiter Laser Altimeter topography data[J]. Geophysical Research Letters,2014-01-01,41(6).