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Geologic evolution of the eastern Eridania basin: Implications for aqueous processes in the southern highlands of Mars

Adeli, Solmaz and Hauber, Ernst and Le Deit, Laetitia and Jaumann, Ralf (2015) Geologic evolution of the eastern Eridania basin: Implications for aqueous processes in the southern highlands of Mars. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS. Wiley. DOI: 10.1002/2015JE004898 ISSN 2169-9097

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Abstract

The Terra Sirenum region of Mars is thought to have hosted the Eridania paleolake during the Late Noachian/Early Hesperian, and it offers an insight into the regional aqueous history of Mars. We focus on four basins, including Atlantis, Simois, Caralis, and an unnamed basin. They are hypothesized to have hosted isolated lakes after the drainage of the Eridania Lake. We produced a geologic map and derived model absolute ages of our main mapped units. The map and model ages enable us to interpret the geologic history of the region. The basin floors are covered by light-toned materials containing Fe/Mg-phyllosilicates. Across most of the region, the Electris unit covers the highlands and is eroded into mesas. The deposition of this unit corresponds to air fall and/or fluvial mechanisms that transported the material into the basins and accumulated it on the plateaus and basin floors and rims. The deposits on the basin floors were later degraded into light-toned knobs that are rich in Fe/Mg-phyllosilicates. On the rim of the Simois and the unnamed basins, a sequence of Al-phyllosilicates on top of Fe/Mg-phyllosilicates has been observed. These Al-phyllosilicate-rich materials may have been formed by pedogenic leaching. The presence of chloride in the area suggests that a playa environment prevailed during the last stage of water presence or after desiccation of the lakes. In the Early Amazonian, the last aqueous activity cemented the postlacustrine air fall deposits in the basins and shows that liquid water was present in Terra Sirenum long after the Noachian.

Item URL in elib:https://elib.dlr.de/100463/
Document Type:Article
Additional Information:Bisher nur online erschienen.
Title:Geologic evolution of the eastern Eridania basin: Implications for aqueous processes in the southern highlands of Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Adeli, Solmazsolmaz.adeli (at) dlr.deUNSPECIFIED
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
Le Deit, Laetitialaetitia.ledeit (at) univ-nantes.frUNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :10.1002/2015JE004898
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:Eridania paleolake; Atlantis Chaos basin; phyllosilicates; chloride salts; aqueous activity; pedogenesis
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Adeli, Solmaz
Deposited On:03 Dec 2015 17:21
Last Modified:08 Mar 2018 18:35

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