Characteristics of de Gerlache crater, site of girlands and slope exposed ice in a lunar polar depression

Kereszturi, Ákos and Tomka, Richárd and Galser, Phlipp and Pál, Bernadett and Steinmann, Vilmos and Warren, Tristam (2022) Characteristics of de Gerlache crater, site of girlands and slope exposed ice in a lunar polar depression. ICARUS, 388. ISSN 0019-1035

Characteristics of de Gerlache crater.pdf
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (11MB) | Preview


The 31 km diameter and 7.5 km deep de Gerlache crater, located 30 km from the southern pole of the Moon was surveyed. At its bottom a 15 km diameter younger crater can be also found beside many smaller overprinting craters. At moderately sloping terrains a few m high, 100–200 m wide, curving quasi-parallel, km long set of ridges could be identified, which seem to be widespread on the surface, and might cover the half or even more of the crater. We named these “girland like features” in this work, which seem to be produced by mass movements on slopes (however differ from most of the already identified slope features, which show downslope elongated lineaments or fallen/redeposited debris on the Moon). At all locations they are superposed by recently formed 10–50 m diameter craters, thus might be older than the equilibrium crater population shown age of about 100 Ma old. This is the first identification of these features at the polar terrains, where they might contribute both in the shielding or exposing of subsurface ice. In de Gerlache crater ice occurrences have previously been located on moderately steep slopes, indicating they might be exposed by mass movement processes, where active movements might have happened in the last some 10 Ma using crater statistics based age of the shallow regolith layer. Only half of them were located at areas with modelled surface temperatures below 110 K, where temperature might be not enough to keep most of the deposited H2O there on Ga time scale. However the real values are probably more diverse because of the limited spatial resolution of available temperature data. Target areas are indicated for possible future missions, where periodic solar illumination, and subsurface ice at 0.5 m depth could be also present.

Item Type: Article
Subjects: Q Science / természettudomány > QB Astronomy, Astrophysics / csillagászat, asztrofizika
Q Science / természettudomány > QE Geology / földtudományok
Depositing User: dr. Ákos Kereszturi
Date Deposited: 24 Mar 2023 13:36
Last Modified: 24 Mar 2023 13:36

Actions (login required)

Edit Item Edit Item