dc.contributor.author
Adeli, Solmaz
dc.contributor.author
Hauber, Ernst
dc.contributor.author
Michael, Gregory G.
dc.contributor.author
Fawdon, Peter
dc.contributor.author
Smith, Isaac B.
dc.contributor.author
Jaumann, Ralf
dc.date.accessioned
2019-08-19T08:45:53Z
dc.date.available
2019-08-19T08:45:53Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/25323
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-4026
dc.description.abstract
The presence of snow and ice at midlatitudes of Mars cannot be explained by current climatic conditions, as surface ice is unstable. However, a large variety of debris‐covered glaciers have been observed at both midlatitudes. Here, we report the presence of local, small‐scale, and debris‐covered stagnant ice deposits on the floor of a valley system in Terra Cimmeria. These deposits, termed valley fill deposits (VFD), have a distribution that is restricted to the host valley floor and to the extent of the ejecta blanket associated with Tarq impact crater. The VFD are characterized by convex‐upward morphology, various crevasses, sublimation pits, an average area of a few square kilometers, and occasional ejecta streaks on their surface. Our model age estimation points to two possible time frames for the Tarq impact event; thus, we suggest two formation scenarios for VFD: (I) distribution of ice due to impact into shallow ice during the Middle Amazonian and (II) post‐impact deposition of VFD due to precipitation. In both scenarios, ice preservation is most likely due to a lag of dust and debris deposited in the valley's topographic lows. Scenario I is more consistent with our geomorphological observation of the VFD being overlain by ejecta streaks. Our results highlight the importance of local geological events and conditions in the distribution and preservation of buried ice deposits on Mars and suggest that more small‐scale and debris‐covered ice deposits may exist in the midlatitudes than previously thought. These deposits are of high importance for future human exploration missions to Mars.
en
dc.format.extent
17 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
debris‐covered ice deposit
en
dc.subject
impact into subsurface ice
en
dc.subject
midlatitudes
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie
dc.title
Geomorphological Evidence of Localized Stagnant Ice Deposits in Terra Cimmeria, Mars
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1029/2018JE005772
dcterms.bibliographicCitation.journaltitle
JGR: Planets
dcterms.bibliographicCitation.number
6
dcterms.bibliographicCitation.pagestart
1525
dcterms.bibliographicCitation.pageend
1541
dcterms.bibliographicCitation.volume
124
dcterms.bibliographicCitation.url
https://doi.org/10.1029/2018JE005772
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Planetologie und Fernerkundung
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2169-9100
refubium.resourceType.provider
WoS-Alert