GEOLOGY OF PHOBOS-GRUNTLANDING SITES:

A VIEW FROM THE MEXHRSC IMAGES.

Vernadsky Institute, Moscow

C. Lorenz, A. Basilevsky

K. Willner

Technical University, Berlin

J. Oberst, M. Waehlisch

German aerospace centerInstitute of Planetary research

Free University Berlin

G. Neukum

© ESA/DLR/FU Berlin (G. Neukum)

MEX H8974_0000 3.9 m/pixel

MEX H7915_0009 4.4 m/pixel

MEX H5851_0000 3.7 m/pixel

Viking Orbiter F242A21 15 m/pixel

5

180

W

210

W

240

W24

0 W

210

W

180

W

0 0

30 N

30 N

5 km

1 km

Fresh craters

Degraded craters

Rimless craters Ghost craters

possible ancient impact depressions

Grooves

N1

N2

N1

N2

N3N3

N2

Terrain 3

D ~ 100 m

Schematic cross section of crater

A

A

A A

H1 ~ 10 – 15 m

H ~ 25 m

HH1

H1 ~ 40 – 50 m

H ~ 60 m

D ~ 300 m

Schematic cross section of the crater

A A

H1

Boulder or central peak?

Avalanche (direction of movement)

H

A

A

CONCLUSIONS

1) Three types of terrains were detected on selected area of Phobos surface;

2) The regolith and underlying material on terrains N1 and N2 could have layered structure;

3) Approved landing site is situated within the terrain N3 while reserved landing site could be located within border between the terrains N2 and N3.

4) The terrains are regional relief units, therefore the properties of regolith samples, those will be gathered by Phobos-Grunt, could be extrapolated to the significant part of Phobos surface.

COMING SOON

Synthesis of complete detailed geomorphological map of selected area and color images

THANK YOU FOR ATTENTION !