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| Titel |
Analysis of Ice-Related Intra-Crater Facies in Promethei Terra, Mars |
| VerfasserIn |
Csilla Orgel, Akos Kereszturi, Stephan van Gasselt |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086266
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| Publikation (Nr.) |
 EGU/EGU2014-1042.pdf |
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| Zusammenfassung |
| On Mars ice-related landforms have been identified at mid-latitudes between 30° and 50° in
both hemispheres including the areas of Tempe Terra, Deuteronilus-Protonilus Mensae,
Phlegra Montes and the rims of the southern-hemispheric impact basins Argyre and Hellas
[1-7].
Our study area – informally termed hourglass-shaped crater [8] – is located near Reull
Vallis on the eastern rim of the Hellas impact basin (39.0°S, 102.8°E). Impact-crater infill
was described as debris-covered piedmont-type glacier [8] based on analysis of High
Resolution Stereo Camera (HRSC) data, and implies a glacial origin with precipitation of ice
during higher obliquity phases. Recent, higher-resolution image data such as data of the High
Resolution Imaging Science Experiment (HiRISE) and the Context Imager (CTX) provide a
more detailed picture of the lateral distribution of different small-scale surface features
indicative of periglacial and/or glacial origin.
The aim of this study is to identify qualitative and quantitative characteristics of these
ice-related landforms and to separate sources of water ice and related processes. Initial age
determinations based on impact-crater size-frequency statistics indicate an age of 3.4 Gyr for
the impact-crater and an age of approximately 75 Myr for the infill [8]. In order to identify a
possible sequence of surface-feature evolution we calculated the age distribution of four
major surface units which span ages ages between 1-47 Myr. Along with detailed age
information and a separation of different processes at this confined type location of Mars
young-Amazonian landscape evolution and potential cyclic signals are being reconstructed to
constrain climate evolution.
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