Mercury's Surface Composition and Character as Measured by Ground-Based Observations
Sprague, A. and Warell, J. and Cremonese, G. and Langevin, Y. and Helbert, J. and Wurz, P. and Veselovsky, I. and Orsini, S. and Milillo, A. (2006) Mercury's Surface Composition and Character as Measured by Ground-Based Observations. Space Science Reviews, 132 (2-4), pp. 399-431. Springer. DOI: 10.1007/s11214-007-9221-3. ISSN 1572-9672.
Full text not available from this repository.
Mercury’s surface is thought to be covered with highly space-weathered silicate material. The regolith is composed of material accumulated during the time of planetary formation, and subsequently from comets, meteorites, and the Sun. Ground-based observations indicate a heterogeneous surface composition with SiO<sub>2</sub> content ranging from 39 to 57 wt%. Visible and near-infrared spectra, multi-spectral imaging, and modeling indicate expanses of feldspathic, well-comminuted surface with some smooth regions that are likely to be magmatic in origin with many widely distributed crystalline impact ejecta rays and blocky deposits. Pyroxene spectral signatures have been recorded at four locations. Although highly space weathered, there is little evidence for the conversion of FeO to nanophase metallic iron particles (npFe0), or “iron blebs,” as at the Moon. Near- and mid-infrared spectroscopy indicate clino- and ortho-pyroxene are present at different locations. There is some evidence for no- or low-iron alkali basalts and feldspathoids. All evidence, including microwave studies, point to a low iron and low titanium surface. There may be a link between the surface and the exosphere that may be diagnostic of the true crustal composition of Mercury. A structural global dichotomy exists with a huge basin on the side not imaged by Mariner 10. This paper briefly describes the implications for this dichotomy on the magnetic field and the 3 : 2 spin : orbit coupling. All other points made above are detailed here with an account of the observations, the analysis of the observations, and theoretical modeling, where appropriate, that supports the stated conclusions.
|Additional Information:||bisher nur Online-Veröffentlichung|
|Title:||Mercury's Surface Composition and Character as Measured by Ground-Based Observations|
|Journal or Publication Title:||Space Science Reviews|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 399-431|
|Keywords:||Mercury, Planetary surface composition, Remote sensing, Ground-based observations, Spectroscopy|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben Vergleichende Planetologie (old)|
|Institutes and Institutions:||Institute of Planetary Research > Planetary Physics|
|Deposited By:||Stefanie Musiol|
|Deposited On:||14 Jan 2008|
|Last Modified:||15 Jan 2010 01:57|
Repository Staff Only: item control page