Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2012-02-10
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
(10 pages, 5 figures, conference or other essential info)
Scientific paper
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 10^8 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.
Chuikova N. A.
Maximova T. G.
Nasonova L. P.
No associations
LandOfFree
Depths of the Relief Compensation and the Anomalous Structure of Crust and Mantle of Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Depths of the Relief Compensation and the Anomalous Structure of Crust and Mantle of Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Depths of the Relief Compensation and the Anomalous Structure of Crust and Mantle of Mars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-275734