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      Anomalies of Density, Stresses, and the Gravitational Field in the Interior of Mars

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          Abstract

          We determined the possible compensation depths for relief harmonics of different degrees and orders. The relief is shown to be completely compensated within the depth range of 0 to 1400 km. The lateral distributions of compensation masses are determined at these depths and the maps are constructed. The possible nonisostatic vertical stresses in the crust and mantle of Mars are estimated to be 64 MPa in compression and 20 MPa in tension. The relief anomalies of the Tharsis volcanic plateau and symmetric feature in the eastern hemisphere could have arisen and been maintained dynamically due to two plumes in the mantle substance that are enriched with fluids. The plumes that originate at the core of Mars can arise and be maintained by the anomalies of the inner gravitational field achieving +800 mGal in the region of plume formation, - 1200 mGal above the lower mantle-core transition layer, and -1400 mGal at the crust.

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          Most cited references2

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          A global solution for the Mars static and seasonal gravity, Mars orientation, Phobos and Deimos masses, and Mars ephemeris

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            Gravity field of Mars: A 75th Degree and Order Model

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              Author and article information

              Journal
              31 July 2012
              Article
              10.3103/S0027134912020075
              1207.7221
              80c8d787-b93c-46a2-b5e9-9a95e0ea5fce

              http://arxiv.org/licenses/nonexclusive-distrib/1.0/

              History
              Custom metadata
              Mosc. Univ. Phys. Bull. 67, 218-225 (2012)
              9 pages, 5 figures
              astro-ph.EP

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