globalchange  > 气候减缓与适应
DOI: 10.1002/2017JE005362
Scopus记录号: 2-s2.0-85042553197
论文题名:
Isostatic Compensation of the Lunar Highlands
作者: Sori M.M.; James P.B.; Johnson B.C.; Soderblom J.M.; Solomon S.C.; Wieczorek M.A.; Zuber M.T.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:2
起始页码: 646
结束页码: 665
语种: 英语
英文关键词: geoid-to-topography ratio ; gravity ; isostasy ; lunar mantle ; Moon ; topography
Scopus关键词: geoid ; isostasy ; lunar mantle ; Moon ; topography
英文摘要: The lunar highlands are isostatically compensated at large horizontal scales, but the specific compensation mechanism has been difficult to identify. With topographic data from the Lunar Orbiter Laser Altimeter and gravity data from the Gravity Recovery and Interior Laboratory, we investigate support of highland topography. Poor correlation between crustal density and elevation shows that Pratt compensation is not important in the highlands. Using spectrally weighted admittance, we compared observed values of geoid-to-topography ratio (GTR) with those predicted by isostatic models. Observed GTRs are 25.8+7.5 –5.7 m/km for the nearside highlands and 39.3+5.7 –6.2 m/km for the farside highlands. These values are not consistent with flexural compensation of long-wavelength topography or Airy isostasy defined under an assumption of equal mass in crustal columns. Instead, the observed GTR values are consistent with models of Airy compensation in which isostasy is defined under a requirement of equal pressures at equipotential surfaces at depth. The gravity and topography data thus reveal that long-wavelength topography on the Moon is most likely compensated by variations in crustal thickness, implying that highland topography formed early in lunar history before the development of a thick elastic lithosphere. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114629
Appears in Collections:气候减缓与适应

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作者单位: Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Lunar and Planetary Institute, Houston, TX, United States; Department of Geosciences, Baylor University, Waco, TX, United States; Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC, United States; Laboratoire Lagrange, Observatoire de la Côte d'Azur, Nice, France

Recommended Citation:
Sori M.M.,James P.B.,Johnson B.C.,et al. Isostatic Compensation of the Lunar Highlands[J]. Journal of Geophysical Research: Planets,2018-01-01,123(2)
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