Tharsis as a consequence of Mars' dichotomy and layered mantle
نویسندگان
چکیده
منابع مشابه
Degree-1 mantle convection and the crustal dichotomy on Mars
The surface of Mars consists of an old, heavily cratered and elevated southern hemisphere and younger, resurfaced and depressed northern hemisphere, a feature often termed the crustal dichotomy. The global crustal structure [Zuber et al., 2000] revealed by topography and gravity data from the Mars Global Surveyor spacecraft, and the possible late formation of the boundary zone between the hemis...
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[1] A dynamic link between the early evolution of Tharsis and the crustal dichotomy on Mars was recently proposed by Zhong (2009). We address in detail the fundamental aspects of the proposed model using 3‐D spherical shell modeling of convection. We investigate the conditions under which a spherical harmonic degree 1 flow is produced in the mantle of Mars in layered viscosity models with diffe...
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The topography on Mars is dominated by the crustal dichotomy between the northern and southern hemispheres and the Tharsis rise on the equator[1]. No explanation has been offered so far as to why the dichotomy should be in its current orientation rather than another. The geoid is currently dominated by Tharsis [2] and rotational stability suggests that a Tharsis-sized load would induce polar wa...
متن کاملThe Opening of the Valles Marineris Canyons on Mars: Stress Focusing along the Buried Dichotomy Boundary beneath Tharsis
Introduction: Valles Marineris is the largest tectonic canyon in the solar system, with a length of ~2500 km, depths of up to 10 km, and widths in excess of 100 km. The location of this canyon on Tharsis, and its orientation radial to the center of the rise suggests Tharsis control of Valles Marineris tectonism. Tharsis loading dominated the tectonic history of Mars, accounting for the radial g...
متن کاملConstraints on the Evolution of the Tharsis Region of Mars
Introduction: The western hemisphere of Mars is dominated by topography associated with the Tharsis volcanic province. A range of models for the formation and/or evolution of this region have been proposed and include (1) dynamic support of topography by a large mantle plume [1,2], (2) regional uplift due to underplating of crustal material derived from the northern hemisphere [3], (3) uplift d...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2004
ISSN: 0094-8276
DOI: 10.1029/2003gl019306