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The mineral diversity of Jezero crater: Evidence for possible lacustrine carbonates on Mars
Anderson, Ryan B.; Horgan, Briony H. N.; Dromart, Gilles +2 more
Noachian-aged Jezero crater is the only known location on Mars where clear orbital detections of carbonates are found in close proximity to clear fluvio-lacustrine features indicating the past presence of a paleolake; however, it is unclear whether or not the carbonates in Jezero are related to the lacustrine activity. This distinction is critical…
Refining the age, emplacement and alteration scenarios of the olivine-rich unit in the Nili Fossae region, Mars
Mangold, N.; Quantin-Nataf, C.; Millot, C. +8 more
The Nili Fossae region of Mars exhibits from remote sensing spectral data the largest exposures of olivine-rich materials on the planet. However, it is not clearly constrained how and when these terrains formed. Some of the proposed scenarios favor a mode of formation closely related to Isidis impact basin: either under intense effusive volcanism …
Crust stratigraphy and heterogeneities of the first kilometers at the dichotomy boundary in western Elysium Planitia and implications for InSight lander
Pan, Lu; Quantin-Nataf, Cathy; Tauzin, Benoit +9 more
InSight landed on Mars on November 26, 2018, in western Elysium Planitia. The Mars crust beneath the lander is subject to complex geologic history next to the great topographic and crustal dichotomy of Mars. Understanding this part of the Martian crust in the subsurface would aid future investigations of the internal structure of the planet based …
Multiple mineral horizons in layered outcrops at Mawrth Vallis, Mars, signify changing geochemical environments on early Mars
Seelos, Frank P.; Murchie, Scott L.; Horgan, Briony +6 more
Refined calibrations of CRISM images are enabling identification of smaller deposits of unique aqueous materials on Mars that reveal changing environmental conditions at the region surrounding Mawrth Vallis. Through characterization of these clay-sulfate assemblages and their association with the layered, phyllosilicate units of this region, more …
Present-day gully activity in Sisyphi Cavi, Mars - Flow-like features and block movements
Massé, Marion; Conway, Susan J.; Hiesinger, Harald +5 more
The continuously increasing number of multi-temporal high-resolution images from the surface of Mars offers the possibility for detailed studies of present-day surface activity. In this study we investigated all gullies in the Sisyphi Cavi region (355° E, 71° S) of the south polar region of Mars. This region is influenced by the seasonal depositio…
Characterization of a local dust storm on Mars with REMS/MSL measurements and MARCI/MRO images
Hueso, Ricardo; Sánchez-Lavega, Agustín; Ordonez-Etxeberria, Iñaki +1 more
The REMS instrument on board the Curiosity rover has been collecting meteorological data from Gale crater on Mars since August 2012. A dust storm that developed north of Gale crater in sol 852 of the Mars Science Laboratory (MSL) mission spread above the location of the Curiosity rover during sols 853-855 (December 30, 2014 to January 1, 2015, are…
Closed depressions in Kotido crater, Arabia Terra, Mars. Possible evidence of evaporite dissolution-induced subsidence
García-Arnay, Ángel; Gutiérrez, Francisco; Baioni, Davide +3 more
The identification of karst sinkholes in Mars may provide evidence of dissolution processes caused by liquid water and information on paleoclimatic and paleohydrological conditions. This work presents a comprehensive cartographic inventory of 513 closed depressions developed on evaporite-bearing Equatorial Layered Deposits (ELDs) within Kotido cra…
Wind retrieval from temperature measurements from the Rover Environmental Monitoring Station/Mars Science Laboratory
Zorzano, María-Paz; Martín-Torres, Javier; Soria-Salinas, Álvaro +1 more
This work presents a novel method for the real-time retrieval of wind speed on the surface of Mars that uses temperature measurements from the Rover Environmental Monitoring Station (REMS) instrument onboard the Curiosity rover of the Mars Science Laboratory (MSL) mission. After final failure of the Wind Sensor (WS) in sol 1491, REMS has not been …
Investigation of target property effects on crater populations in long lava flows: A study in the Cerberus region, Mars, with implications for magma source identification
Burr, Devon M.; Kattenhorn, Simon A.; Golder, Keenan B.
Young volcanism on Mars is exemplified within the Cerberus region, which enables examination of relatively pristine lava flow surfaces. In this investigation, we derived model ages within the circum-Cerberus channelized lavas for sites proximal, medial, and distal to the lava flow sources, finding that these ages decrease with increasing distance …
Spatiotemporal evolution, mineralogical composition, and transport mechanisms of long-runout landslides in Valles Marineris, Mars
Ehlmann, Bethany L.; Yin, An; Watkins, Jessica A.
Long-runout landslides with transport distances of >50 km are ubiquitous in Valles Marineris (VM), yet the transport mechanisms remain poorly understood. Four decades of studies reveal significant variation in landslide morphology and emplacement age, but how these variations are related to landslide transport mechanisms is not clear. In this s…