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Dielectric properties of lava flows west of Ascraeus Mons, Mars

Geophysical Research Letters

By:
, , , , , , , ,
DOI: 10.1029/2009GL041234

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Abstract

The SHARAD instrument on the Mars Reconnaissance Orbiter detects subsurface interfaces beneath lava flow fields northwest of Ascraeus Mons. The interfaces occur in two locations; a northern flow that originates south of Alba Patera, and a southern flow that originates at the rift zone between Ascraeus and Pavonis Montes. The northern flow has permittivity values, estimated from the time delay of echoes from the basal interface, between 6.2 and 17.3, with an average of 12.2. The southern flow has permittivity values of 7.0 to 14.0, with an average of 9.8. The average permittivity values for the northern and southern flows imply densities of 3.7 and 3.4 g cm-3, respectively. Loss tangent values for both flows range from 0.01 to 0.03. The measured bulk permittivity and loss tangent values are consistent with those of terrestrial and lunar basalts, and represent the first measurement of these properties for dense rock on Mars. Copyright 2009 by the American Geophysical Union.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Dielectric properties of lava flows west of Ascraeus Mons, Mars
Series title:
Geophysical Research Letters
DOI:
10.1029/2009GL041234
Volume
36
Issue:
23
Year Published:
2009
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article