DOI: 10.1002/2014GL062487
论文题名: Thickness of the crust of Mercury from geoid-to-topography ratios
作者: Padovan S. ; Wieczorek M.A. ; Margot J.-L. ; Tosi N. ; Solomon S.C.
刊名: Geophysical Research Letters
ISSN: 0094-8949
EISSN: 1944-8680
出版年: 2015
卷: 42, 期: 4 起始页码: 1029
结束页码: 1038
语种: 英语
英文关键词: crustal thickness
; excavation of mantle material
; mantle heat generation
; Mercury
Scopus关键词: Planetary surface analysis
; Radioactive elements
; Structural geology
; Surface topography
; Topography
; Tungsten
; Crustal thickness
; Excavated materials
; Heat production
; Heat-producing elements
; Isostatic compensation
; Northern Hemispheres
; Space environment
; Terrestrial planets
; Mercury (metal)
; core (planetary)
; crater
; crustal thickness
; fallout
; geoid
; heat production
; isostasy
; mantle
; Mercury (planet)
; Moon
; Northern Hemisphere
; topographic effect
英文摘要: To gain insight into the thickness of the crust of Mercury, we use gravity and topography data acquired by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging spacecraft to calculate geoid-to-topography ratios over the northern hemisphere of the planet. For an Airy model for isostatic compensation of variations in topography, we infer an average crustal thickness of 35 ± 18 km. Combined with the value of the radius of the core of Mercury, this crustal thickness implies that Mercury had the highest efficiency of crustal production among the terrestrial planets. From the measured abundance of heat-producing elements on the surface, we calculate that the heat production in the mantle from long-lived radioactive elements at 4.45 Ga was greater than 5.4 ×10-12W/kg. By analogy with the Moon, the relatively thin crust of Mercury allows for the possibility that major impact events, such as the one that formed the Caloris basin, excavated material from Mercury's mantle. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924875368&doi=10.1002%2f2014GL062487&partnerID=40&md5=28c9b406623ee0f12e91df418446ed2b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8565
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, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Padovan S.,Wieczorek M.A.,Margot J.-L.,et al. Thickness of the crust of Mercury from geoid-to-topography ratios[J]. Geophysical Research Letters,2015-01-01,42(4).