Journal ArticleDOI
Assessing the role of clay and salts on the origin of MARSIS basal bright reflections
TLDR
In this paper , it was shown that perchlorates and chlorides brines exhibit a strong dielectric response at much lower temperatures than other materials and therefore do not generate strong basal reflections at MARSIS frequencies and Martian temperatures.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2022-02-01. It has received 10 citations till now. The article focuses on the topics: Geology & Basal (medicine).read more
Citations
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Journal ArticleDOI
Using MARSIS signal attenuation to assess the presence of South Polar Layered Deposit subglacial brines
Sebastian Lauro,Elena Pettinelli,Graziella Caprarelli,Jamaledin Baniamerian,Elisabetta Mattei,Barbara Cosciotti,David E. Stillman,K. M. Primm,Francesco Soldovieri,Roberto Orosei +9 more
TL;DR: In this article , the authors presented a detailed analysis of attenuation, based on data acquired by MARSIS at 3, 4, and 5 MHz, and showed that attenuation is frequency dependent, and that its behavior is consistent throughout the entire region.
Journal ArticleDOI
The stability of a liquid-water body below the south polar cap of Mars
Isabel Egea-González,P. Lois,Alberto Jiménez-Díaz,Ali M. Bramson,Michael M. Sori,Juan-Ángel Tendero-Ventanas,Javier Navarro Ruiz +6 more
TL;DR: In this paper , a new depth to the bright reflector between 1.3 and 1.5 km was obtained by using a temperature dependent relative permittivity for the water ice and taking into account the dust content in the area.
Journal ArticleDOI
Geologic Context of the Bright MARSIS Reflectors in Ultimi Scopuli, South Polar Layered Deposits, Mars
TL;DR: In this paper , the authors mapped the surface of the South Polar Layered Deposits (SPLD) immediately above and surrounding the putative lakes (1:2M map scale) in order to provide geologic context for interpretation of the bright basal reflectors.
Journal ArticleDOI
Can Clay Mimic the High Reflectivity of Briny Water Below the Martian SPLD?
TL;DR: In this article , it was shown that even for a large water content in the clay sample, at 230 K and 4 MHz, the apparent permittivity is only 8.4, dropping to 4.1 at 200 K, ruling out clays as a possible source of the bright reflections detected by MARSIS at the base of the SPLD.
Journal ArticleDOI
Surface topographic impact of subglacial water beneath the south polar ice cap of Mars
TL;DR: In this article , the surface topography of the south polar layered deposits overlying the area of the putative lakes was analyzed using the Mars Orbiter Laser Altimeter data, and it was shown that comparable topographic anomalies form within 0.5-1.5 Myr with locally elevated geothermal heating.
References
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Journal ArticleDOI
Measurement of the Intrinsic Properties of Materials by Time-Domain Techniques
A. M. Nicolson,G. F. Ross +1 more
TL;DR: In this paper, a method is presented for determining the complex permittivity and permeability of linear materials in the frequency domain by a single time-domain measurement; typically, the frequency band extends from VHF through X band.
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Automatic measurement of complex dielectric constant and permeability at microwave frequencies
TL;DR: In this article, a system is employed that automatically measures the complex reflection and transmission coefficients that result when a sample of material is inserted in waveguide or a TEM transmission line.
Journal ArticleDOI
Global Mineralogical and Aqueous Mars History Derived from OMEGA/Mars Express Data
Jean-Pierre Bibring,Yves Langevin,John F. Mustard,François Poulet,R. E. Arvidson,Aline Gendrin,Brigitte Gondet,Nicolas Mangold,Patrick Pinet,François Forget,Michel Berthé,Cécile Gomez,D. Jouglet,A. Soufflot,Mathieu Vincendon,M. Combes,Pierre Drossart,Thérèse Encrenaz,Thierry Fouchet,Riccardo Merchiorri,GianCarlo Belluci,Francesca Altieri,Vittorio Formisano,Fabricio Capaccioni,P. Cerroni,Angioletta Coradini,Sergio Fonti,Oleg Korablev,V. Kottsov,Nikolai Ignatiev,V. I. Moroz,D.V. Titov,L. V. Zasova,Damien Loiseau,Patrick Pinet,Sylvain Douté,Bernard Schmitt,Christophe Sotin,Ernst Hauber,Harald Hoffmann,Ralf Jaumann,U. Keller,Raymond E. Arvidson,Tom Duxbury,François Forget,G. Neukum +45 more
TL;DR: Global mineralogical mapping of Mars by the Observatoire pour la Mineralogie, l'Eau, les Glaces et l'Activite (OMEGA) instrument on the European Space Agency's Mars Express spacecraft provides new information on Mars' geological and climatic history.
Journal ArticleDOI
Complex Permittivity of Water as a Function of Frequency and Temperature
Journal ArticleDOI
Subsurface water and clay mineral formation during the early history of Mars
Bethany L. Ehlmann,John F. Mustard,Scott L. Murchie,Jean-Pierre Bibring,Alain Meunier,Abigail A. Fraeman,Yves Langevin +6 more
TL;DR: Clay minerals, recently discovered to be widespread in Mars’s Noachian terrains, indicate long-duration interaction between water and rock over 3.7 billion years ago, and available data indicate substantial Martian clay formation by hydrothermal groundwater circulation and a Noachia rock record dominated by evidence of subsurface waters.