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dc.contributor.author
Mushkin, Amit
dc.contributor.author
Sletten, Ronal
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Trombotto, Dario Tomas
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Jigjidsurengiin, Batbaatar
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Amit, Rivka
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Halevy, Itay
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Morag, Navot
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Gillespie, Alan R.
dc.date.available
2023-11-28T18:32:47Z
dc.date.issued
2021
dc.identifier.citation
A terrestrial brine-seepage analog for Martian slope streaks near Salar de Pedernales in the Atacama Desert, Chile; The Geological Society of America: Connects 2021; Oregon; Estados Unidos; 2021; 1-1
dc.identifier.uri
http://hdl.handle.net/11336/218720
dc.description.abstract
Martian slope streaks are elongated down-slope, low-albedo surface features that currently form within sub-annual time scales in the high-albedo (“dusty”) regions of equatorial Mars. These km-scale streaks, which can persist up to several decades on the Martian surface, present one of the most enigmatic and dynamic suites of active surface features on present-day Mars. Two categories of explanations remain in debate regarding their nature: 1) “Dry” formation models, in which surface darkening is associated with mass wasting processes, such as dust avalanches; and 2) “Wet” formation models, in which surface darkening is associated with transient wetting of the surface by either seepage of sub-surface brines or deliquescence of atmospheric moisture. Here, we report recently discovered dark slope streaks that occur in the high Atacama Desert in Chile and display a close geomorphic resemblance to the Martian streaks. Field examination of the Atacama slope streaks revealed that they formed through down-slope seepage of groundwater brines sourced from the Salar de Pedernales located 500 m away. Chemical and mineralogical analyses demonstrate that salts deposited from the Pedernales brines combined with detrital input from soils/dust are responsible for surface darkening in the Atacama case. Field-based spectral measurements in the 0.4-2.5 micron wavelength range compare to those obtained from orbit for the Martian slope streaks. In addition, high-resolution topography derived from drone imagery revealed that the Atacama streaks are rougher than their surroundings at the decimeter-scale roughness of the entire hillslope they occur on. A similar distinction was previously established between Martian slope streaks and their surrounding slopes, although on Mars these roughness variations appear to occur at lower-range sub-centimeter scales. Our study of the unique Atacama slope streaks may support “wet” formation as a viable hypothesis for some of the Martian slope streaks.
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application/pdf
dc.language.iso
eng
dc.publisher
The Geological Society of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Martian slope streaks
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Atacama
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Desert
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Salar de pedernales
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Geociencias multidisciplinaria
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
A terrestrial brine-seepage analog for Martian slope streaks near Salar de Pedernales in the Atacama Desert, Chile
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info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/conferenceObject
dc.type
info:ar-repo/semantics/documento de conferencia
dc.date.updated
2022-11-04T15:37:09Z
dc.journal.volume
53
dc.journal.number
6
dc.journal.pagination
1-1
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Oregon
dc.description.fil
Fil: Mushkin, Amit. Geological Survey of Israel; Israel
dc.description.fil
Fil: Sletten, Ronal. University of Washington; Estados Unidos
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Fil: Trombotto, Dario Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
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Fil: Jigjidsurengiin, Batbaatar. University of Washington; Estados Unidos
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Fil: Amit, Rivka. Geological Survey of Israel; Israel
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Fil: Halevy, Itay. Weizmann Institute Of Science.; Israel
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Fil: Morag, Navot. Geological Survey of Israel; Israel
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Fil: Gillespie, Alan R.. University of Washington; Estados Unidos
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://gsa.confex.com/gsa/2021AM/webprogram/Paper369008.html
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/abs/2021AM-369008
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Autor
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Autor
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Autor
dc.coverage
Internacional
dc.type.subtype
Congreso
dc.description.nombreEvento
The Geological Society of America: Connects 2021
dc.date.evento
2021-10-10
dc.description.ciudadEvento
Oregon
dc.description.paisEvento
Estados Unidos
dc.type.publicacion
Journal
dc.description.institucionOrganizadora
The Geological Society of America
dc.source.revista
Geological Society of America Abstracts with Programs
dc.date.eventoHasta
2021-10-13
dc.type
Congreso
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