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Depths of the Relief Compensation and the Anomalous Structure of Crust and Mantle of Marsстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 28 ноября 2012 г.
- Авторы: Chuikova N.A., Nasonova L.P., Maximova T.G.
- Журнал: Electronic arXiv http://arxiv.org/abs/1202.2246
- Номер: 1202.2246
- Год издания: 2012
- DOI: 10.3103/S0027134911010085
- Аннотация: This study determined the contribution of Martian topography and the density jump at the Mohorovicic discontinuity (M) to the gravity in a quadratic approximation. It also resolved the problem of determining the possible depths of compensation for topography harmonics of various degrees and orders. It shows that all the topography compensation is within the depth range from 0 to 1400 km. Different topographic irregularities are most likely to be compensated at depths that correspond to the upper crust ( d = (4.5+- 3.7) km), crust–mantle transition layer ( d = (78 +- 24) km), lithospheric boundary ( d = (200 +- 34) km), upper-middle mantle transition layer ( d = (400 +- 70) km), or middle-lower mantle transition layer ( d = (1120 +- 180) km). This paper presents the lateral distributions of compensation masses for these depths and the respective maps. According to calculations, stresses in the Martian crust and mantle may be as high as 108 Pa. This paper shows that the topographic anomalies of the Tharsis volcanic plateau and the symmetric formation in the eastern hemisphere could have originated and be dynamically maintained by two plumes of melted mantle substance enriched with fluids; these plumes may have their origin at the boundary of the lower mantle.
- Добавил в систему: Насонова Людмила Павловна