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Abstract
On Mars, seasonal martian flow features known as recurring slope lineae (RSL) are prevalent on sun-facing slopes and are associated with salts. On Earth, subsurface interactions of gypsum with chlorides and oxychlorine salts wreak havoc: instigating sinkholes, cave collapse, debris flows, and upheave. Here, we illustrate (i) the disruptive potential of sulfate-chloride reactions in laboratory soil crust experiments, (ii) the formation of thin films of mixed ice-liquid water “slush” at −40° to −20°C on salty Mars analog grains, (iii) how mixtures of sulfates and chlorine salts affect their solubilities in low-temperature environments, and (iv) how these salt brines could be contributing to RSL formation on Mars. Our results demonstrate that interactions of sulfates and chlorine salts in fine-grained soils on Mars could absorb water, expand, deliquesce, cause subsidence, form crusts, disrupt surfaces, and ultimately produce landslides after dust loading on these unstable surfaces.

Related Keywords

Phoenix ,Arizona ,United States ,Paso Robles ,Mawrth Vallis ,Olympia Undae ,Phoenix Lander Wet Chemistry Laboratory ,Mars Science Laboratory ,Compact Reconnaissance Imaging Spectrometer ,Mars Reconnaissance Orbiter ,Noctis Labyrinthus ,Blunts Point ,Mars Odyssey ,Medusae Fossae ,Terra Sirenum ,பீனிக்ஸ் ,அரிசோனா ,ஒன்றுபட்டது மாநிலங்களில் ,பாசோ ரோபிள்ஸ் ,பீனிக்ஸ் லேண்டர் ஈரமான வேதியியல் ஆய்வகம் ,செவ்வாய் கிரகம் அறிவியல் ஆய்வகம் ,மழுங்கடிக்கிறது பாயஂட் ,செவ்வாய் கிரகம் ஒடிஸி ,

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