Loading...
Please wait, while we are loading the content...
Similar Documents
1convective modelling of gravity, topography and melt generation at the tharsis rise, mars.
| Content Provider | CiteSeerX |
|---|---|
| Author | Nimmo, Francis |
| Abstract | The observed long-wavelength gravity and topography at the Tharsis Rise, and the inferred heat flux and melt generation rate, are modelled using a convection code. The code is axisymmetric and isoviscous and incorporates a conductive lid and the effects of lithospheric rigidity on the observables. Models which fit the observations have high mantle viscosities (5-28×1022 Pa s) and 80 % or less internal heating. Although the melt generation results are sensitive to the (poorly known) mantle temperature, the other observables are not. The high viscosities are consistent with a dry, and probably cold, Martian mantle, and are also suggested by simple scaling arguments. The internal heating rates are consistent with values obtained from parameterized thermal evolution models. The volcanic Tharsis Rise is one of the most prominent topographic and gravitational features on Mars, and has been the subject of study for more than twenty years. Models attempting to explain the observed features have invoked either static (flexural or isostatic) or dynamic (convective) support of the topography. In this paper, |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Tharsis Rise Melt Generation Inferred Heat Flux Melt Generation Result Thermal Evolution Model Conductive Lid Internal Heating Rate High Mantle Viscosity Martian Mantle Observed Long-wavelength Gravity High Viscosity Mantle Temperature Observed Feature Gravitational Feature Melt Generation Rate Convection Code Lithospheric Rigidity Internal Heating Volcanic Tharsis Rise |
| Content Type | Text |
