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Thickness of the crust of Mercury from geoid-to-topography ratios

Padovan, S. and Wieczorek, M.A. and Margot, J.-L. and Tosi, Nicola and Solomon, S. (2015) Thickness of the crust of Mercury from geoid-to-topography ratios. Geophysical Research Letters, 42 (4), pp. 1029-1038. Wiley. DOI: 10.1002/2014GL062487 ISSN 0094-8276

Full text not available from this repository.

Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2014GL062487/abstract

Abstract

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.

Item URL in elib:https://elib.dlr.de/101644/
Document Type:Article
Title:Thickness of the crust of Mercury from geoid-to-topography ratios
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Padovan, S.UNSPECIFIEDUNSPECIFIED
Wieczorek, M.A.Institut de Physique du Globe de Paris, FranceUNSPECIFIED
Margot, J.-L.UNSPECIFIEDUNSPECIFIED
Tosi, Nicolanicola.tosi (at) dlr.deUNSPECIFIED
Solomon, S.UNSPECIFIEDUNSPECIFIED
Date:28 February 2015
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:42
DOI :10.1002/2014GL062487
Page Range:pp. 1029-1038
Editors:
EditorsEmail
Diffenbaugh, NoahDepartment of Environmental Earth System Science and Woods Institute for the Environment Stanford University Jerry Yang & Akiko Yamazaki Environment & Energy Building 473 Via Ortega Stanford, CA 94305 (MC-4216)
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Mercury, crustal thickness, geoid, topography
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Institute of Planetary Research > Planetary Physics
Deposited By: Rückriemen, Tina
Deposited On:07 Jan 2016 09:40
Last Modified:01 Dec 2018 19:51

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