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A Hydrothermally Altered, Mn-incrusted Marine Sediment as an Analogue for Martian Deposits?

Gross, C. and Bishop, J.L. and Maturilli, Alessandro and D'Amore, Mario and Helbert, Jörn (2015) A Hydrothermally Altered, Mn-incrusted Marine Sediment as an Analogue for Martian Deposits? AGU 2015, 14-18 December 2015, San Francisco.

Full text not available from this repository.

Abstract

The investigated sample was dredged in the Kahouanne basin during the research cruise SO-154 (RV Sonne) in the Lesser Antilles Island Arc between the islands of Guadeloupe and Montserrat (Halbach et al., 2002). The Kahouanne basin represents the southern extension of the large Kallinago intra-arc basin and has a length of approximately 40 km and a width of 15 km. The western margin of the basin is dominated by the Shoe-Rock-Spur fault zone. Previous research cruises found indications for low-temperature hydrothermal fluid-flow along the fault zone (Polyak et al., 1992). The sample 18CD is a sediment with grain- sizes of 0.25-0.63 mm, cemented by a Nontronite-Manganese matrix, partly displaying layer-like texture. The groundmass is composed of feldspar, pyroxenes, glass- and rhyodacitic fragments, as well as pelagic carbonates in clasts of different size. Often, ignimbritic textures are visible, pointing to volcanic ejection products. A detailed analysis was carried out on the sample 18CD, starting with the preparation of thin-sections, followed by XRD, XRF, ICP-OES, AAS, SEM (EDX-ZAF). In addition, we analyzed the sample with bi-directional reflectance and emission measurements conducted in the Planetary Emissivity Laboratory (PEL) at the German Aerospace Center (DLR), as well as visible/near-infrared reflectance using an ASD spectrometer at the SETI Institute. The results of the spectroscopic measurements show striking similarities to Martian nontronites, detected by orbiting instruments. Furthermore, the in-depth analyses of the hydrothermally altered sediment reveals reasonable processes and products for past and present Mars.

Item URL in elib:https://elib.dlr.de/101707/
Document Type:Conference or Workshop Item (Poster)
Title:A Hydrothermally Altered, Mn-incrusted Marine Sediment as an Analogue for Martian Deposits?
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gross, C.Freie Universität Berlin, Geological Sciences, Planetary Sciences & Remote Sensing, Berlin, GermanyUNSPECIFIED
Bishop, J.L.Carl Sagan Center, SETI Institute and NASA-Ames Research Center, Mountain View, CAUNSPECIFIED
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.deUNSPECIFIED
D'Amore, MarioMario.DAmore (at) dlr.dehttps://orcid.org/0000-0001-9325-6889
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:16 December 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Mars, PEL
Event Title:AGU 2015
Event Location:San Francisco
Event Type:international Conference
Event Dates:14-18 December 2015
Organizer:AGU
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 BepiColombo (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: Maturilli, Alessandro
Deposited On:06 Jan 2016 14:07
Last Modified:01 Dec 2018 19:51

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