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Reconstructing paleoenvironments in Robert Sharp Crater, Mars: Evidence for a fluvio-lacustrine system

Brossier, Jérémy F. and Le Deit, L. and Hauber, Ernst and Mangold, N. and Carter, J. and Jaumann, R. (2018) Reconstructing paleoenvironments in Robert Sharp Crater, Mars: Evidence for a fluvio-lacustrine system. 14th Japan Geosciences Union, 20-24 May 2018, Chiba, Japan.

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Abstract

Recent mineralogical studies suggest the presence of an iron chlorine hydroxide, namely akaganeite. This mineral is known to form under specific conditions, and it has been detected in the Robert Sharp Crater, located at Mars’ low-latitudes (133.59˚E, -4.12˚N) [1]. Its detection implies an acidic and oxidizing environment in this region. Indeed, akaganeite typically forms in highly saline and chlorinated aqueous environments on Earth. These akaganeite deposits might be the ultimate alteration phase of a drying lake within the Robert Sharp Crater. Hence, we carried out morphological and stratigraphical studies, as well as age determination by crater counting to constrain the geological and hydrological history of the region [2]. We found that the Robert Sharp Crater has known a varied geological history, including the formation of fretted terrains and an airfall filling during the Hesperian epoch. Furthermore, the presence of valleys and fan-shaped deposits, and the detection of various aqueous minerals, in the region suggest the possibility of a fluvio-lacustrine activity phase within the crater during the last period of the Martian chronology, also named Amazonian epoch. The presence of a putative paleolake should be short-time and estimated between 1.3 Ga and 500 Ma. Thus, by reconstructing the paleoenvironments in the Robert Sharp Crater, we demonstrate that Mars has known several episodes of aqueous activities well after the late Noachian/ early Hesperian period. References: [1] Carter, J. et al. (2015) Icarus, 253. [2] Brossier, J. F. et al. (in prep).

Item URL in elib:https://elib.dlr.de/120192/
Document Type:Conference or Workshop Item (Poster)
Title:Reconstructing paleoenvironments in Robert Sharp Crater, Mars: Evidence for a fluvio-lacustrine system
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brossier, Jérémy F.Jeremy.Brossier (at) dlr.dehttps://orcid.org/0000-0001-7423-2494
Le Deit, L.Université de Nantes, Laboratoire de Planétologie et GéodynamiqueUNSPECIFIED
Hauber, ErnstErnst.Hauber (at) dlr.dehttps://orcid.org/0000-0002-1375-304X
Mangold, N.LPGN, CNRS, Université Nantes, FranceUNSPECIFIED
Carter, J.Institut d’Astrophysique Spatiale, CNRS Université Paris- Sud, Orsay, FranceUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Date:May 2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Geological mapping, Mars geology, Robert Sharp crater
Event Title:14th Japan Geosciences Union
Event Location:Chiba, Japan
Event Type:international Conference
Event Dates:20-24 May 2018
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 - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Brossier, Jérémy F.
Deposited On:10 Sep 2018 14:46
Last Modified:31 Jul 2019 20:17

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