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Terrestrial Analogs 2021 (LPI Contrib. No. 2595)
No full textDiscussions of scientific investigations of planetary analog terrains and processes, exploration strategies, and orbit-to-ground comparisons. Abstracts were solicited for topics including various planetary processes (volcanic, impact, aeolian, subaqueous, mass-wasting, glacial, tectonic, and others) as well as geophysical, geochemical, and astrobiological investigations. Discussions of field methods, sampling techniques, exploration strategies, technology applications, and ground-truthing were also solicited, as were topics related to data standardization and dissemination. In addition, the workshop aimed to address analog work that will benefit human and robotic exploration of other planetary surfaces.Conveners Lauren Edgar, Amber Gullikson, Melody Hartke, Elise Rumpf, Jim SkinnerPARTIAL CONTENTS: Fjord-Head Deltas in Finnmark, Norway: Analogs for Paleolake Fan-Deltas in Xanthe Terra, Mars / J. W. Luna, K. Crane, and G. D. Corner -- Mafic Aeolian Systems on Earth as Analogues for Mars / E. M. Lund and R. C. Ewing -- Investigating Transitional Subsurface Habitable Zones in Martian Paleolake Analog Environments / K. L. Lynch -- Waqf As Suwaan as a Titan Crater Analog: The Role of Fluvial Erosion / S. M. MacKenzie, R. D. Lorenz, E. P. Turtle, and C. D. Neish -- Enabling Planetary Exploration Strategy Research in Analogs with Playbook / J. J. Marquez -- Grain Size and Shape Analysis of Basaltic Aeolian and Fluvial Sediment in a Volcanic Catchment: Ϸórisjökull Glacier, Iceland / K. G. Mason, R. C. Ewing, M. Nachon, E. B. Rampe, B. Horgan, M. G. A. Lapotre, C. C. Bedford, P. Sinha, E. Champion, and P. Gray -- Virtual Reality Enabled Exploration of Planetary Geologic Analogs — Towards VR-Enabled Robotic Exploration of the Moon / M. A. Matiella Novak, K. D. Runyon, J. Strang, C. Hibbitts, and J. Heldmann -- Correlating Grain-Scale Properties and Synthetic Aperture Radar on Arid Alluvial Fans for Interpreting Planetary Surfaces / A. D. Maue, D. M. Burr, and M. J. Jarquin -- Investigation of a Mars-Analog Basaltic Subsurface Lava Tube Environment / A. C. McAdam, C. N. Achilles, D. M. Bower, C. B. Fishman, M. Millan, S. S. Johnson, M. Napoleoni, C. A. Knudson, M. Weng, J. E. Bleacher, R. D. Arevalo, M. Musilova, and K. E. Young -- Scientific Physical and Operations Characterization (SPOC): Studying Scientists in the Wild to Inform Human Planetary Exploration Operations / M. J. Miller, L. Stirling, R. Vitali, S. Murphy, K. J. Kim, C. W. Pittman, M. Miller, and T. Graff -- Cerro Gordo, an Analog of a Martian Composite Volcano / O. G. Monasterio, J. S. Oliveira, S. F. Romero, J. L. García Bueno, and M. Diaz Michelena -- Mars-Analogue Alluvial Fans in the Chilean Atacama Desert / A. M. Morgan, M. C. Palucis, R. M. E. Williams, D. E. H. Hobley, J. M. Moore, and R. A. Craddock -- What Makes a Great Terrestrial Planetary Analog? / P. J. Mouginis-Mark -- Terrestrial Hot Springs as Analogs for Hydrothermal Deposits on Mars / C. Munoz-Saez, B. Black, J. Gong, and A. Perez-Fodich
Complex Brines and Their Implications for Habitability
Full text linkWe conclude that complex brines must exist in the shallow subsurface of Mars and the Icy Worlds, and that liquid saline water should be present where ice has existed, the temperature is above ~160 K, and evaporation and sublimation have been inhibited.Edgard G. Rivera-Valentín, Justin Filiberto, Kennda L. Lynch, Irena Mamajanov, Timothy W. Lyons, Mitch Schulte, and Abel Ménde
Numerical modeling of the formation of Shackleton crater at the lunar south pole
No full textThe lunar south pole, on the rim of Shackleton crater, is the target for the next human landing on the Moon. We use numerical modeling to investigate the formation of that crater and the distribution of ejecta around the south pole. We find that a 1.5 km diameter asteroid with a chondrite-like composition, vertically impacting a gabbroic anorthositic target at 15 km/s, forms a crater morphologically similar to Shackleton. If the impact had a shallower 45-degree trajectory, the asteroid may have had a diameter of 1.75 km and velocity of 15 km/s or a diameter of 1.5 km and velocity of 20 km/s. Impact melt is generated during the impact, with most of the melt volume ponding on the crater floor. We introduce a water-bearing layer at various depths in the target and find that the burial depth of a volatile layer influences the final crater morphology and may explain the morphology of Shackleton
12th Planetary Crater Consortium Mtg 2021 (LPI Contrib. No. 2621)
No full textMeeting open to papers on any aspect of impact cratering on solar system bodies. Welcomed abstracts related to observational, theoretical, experimental, and numerical modeling studies of impact craters on planets, dwarf planets, moons, asteroids, comets, or other small solar system objects.Lunar and Planetary Institute Universities Space Research AssociationConvener, Michelle Kirchoff, Southwest Research Institute, Boulder, Colorado, Stuart Robbins, Southwest Research Institute, Boulder, ColoradoPARTIAL CONTENTS: Thermodynamic Modelling of Hydrothermal Alteration in the Vista Alegre Impact Structure (Brazil) to Distinguish Between Different Alteration Stages / J. Alsemgeest and F. M. Brouwer -- Mars Crater Modification in the Late Noachian II: Updated Criteria for Identifying Cold-Based Crater Wall Glaciation / B. D. Boatwright and J. W. Head -- The Pitted Ramparts of Large Multi-Layered Craters on Mars: Their Possible Formation Mechanisms and Their Implications / J. M. Boyce -- Are the Fireball Orbits Associated with the Perseid Meteor Shower an Indication of a Previous Low Angle Skip Impact by Comet 109P/Swift-Tuttle? / J. A. Burgener -- Uncovering Ganymede's Past: Crater Size Frequency Distributions on Nippur/Philus Sulci / L. M. Burkhard, E. S. Costello, and M. E. Cameron -- Were Impactoclastic features on Mars Mistaken for Feature Deposited by Water or Wind? / D. M. Burt -- Rocky Ejecta Blankets of the Lunar Mare / M. A. Chertok, P. G. Lucey, and E. S. Costello -- The Enigmatic Sachsendorf Bay Structure (Oderbruch, Northeast Germany): Evidence of a Pleistocene/Holocene Meteorite Impact Event / K. Ernstson, J. Poßekel, and J. Kurtz -- Aspects of Crater Rim Crests: Improving the Accuracy of Absolute Model Ages / T. A. Giguere, J. M. Boyce, J. J. Gillis-Davis, S. K. Rowland, and J. D. Stopar -- Possible Pleistocene Impact in Louisiana as an Analog for Craters in Martian Duststone Settings / M. Horn, P. V. Heinrich, D. Hood, A. Herr, A. Webb, P. James, S. Karunatillake, A. Ermakov, and J. Lorenzo -- Characterizing Moulton Crater and Its Immediate Surroundings / M. J. Jodhpurkar, L. R. Ostrach, and N. E. B. Zellner -- Two Dated Small Impacts on the South Polar Layered Deposits, Mars, and Implications for Near-Surface Properties / M. E. Landis, C. M. Dundas, P. O. Hayne, A. S. McEwen, I. J. Daubar, S. Byrne, S. S. Sutton, A. Britton, and K. E. Herkenhoff
Venera-D 2021
No full textThe purpose of this workshop is to discuss the formation and stability of Venus clouds over time and their role in potential habitability. This workshop will discuss what is understood about past and present habitability, the best measurements and methods needed to address these questions, and how future missions will contribute to understanding the cloud habitability system.Convener: Dmitry Gorinov, Space Research Institution (IKI), Jaime A. Cordova, University of Wisconsi
Topographic map of Triton from shape-from-shading information
No full textTopographic map of Triton from shape-from-shading information. Description in and citation when using data: Schenk et al., (2021) Triton: Topography and Geology of a Probable Ocean World with Comparison to Pluto and Charon, Remote Sensing, 13, 3476-3490
Global 3-color mosaic of Triton
No full textGlobal 3-color mosaic of Triton: Color filters used include orange, blue and ultraviole
36th Annual Summer Intern Conference (2021)
No full textPapers presented at the 2021 Summer Intern Program for Undergraduates held at the Lunar and Planetary InstituteSponsored by Lunar and Planetary Institute, NASA Johnson Space CenterDistribution of Hydrothermal Veins in Chicxulub Crater Impact Breccias / E. T. Blom and D. A. Kring -- Multivariate Analysis of Meteorite Signatures in Weather Radar Imagery / M. A. Broussard, M. Fries, and A. Farnsworth -- Modeling Metamorphism of the Venusian Basaltic Crust / N. Clark, J. Gorce, and J. Filiberto -- On the Origins of Pink Spinel / M. I. Frank and T. C. Prissel -- Geochemical Modeling of Perchlorate-Supported Ecosystems Under Martian Conditions / C. G. Goodale and K. L. Lynch -- Origin of Eclogitic Clasts in CR Chondrite Northwest Africa 801 / E. A. Heiny, J. S. Gorce, and J. Filiberto -- A New Global Search for Lunar Pyroclastics and a Regional Study of Lavoisier / K. R. Ivey, J. D. Stopar, and L. R. Gaddis -- Near-Infrared Spectroscopy of (3122) Florence and (357439) 2004 BL86 During Near-Earth Encounters / S. S. Larsen and D. Takir -- Crater Morphologies on Vesta and Ceres and their Implications for Crustal Strength / M. J. McEnroe and P. M. Schenk -- Constraining the Vertical Distribution of Water Vapor on Mars: Implications for the Martian Water Cycle / S. M. Mendenhall and G. M. Martínez -- Snowline Elevations and Discordance of Elevation and Reflectance on Venus's Maxwell Montes / A. Strezoski and A. H. Treiman -- Ring Faults on Sapas Mons (Venus) and Elliptical Magma Chambers / D. W. vonLembke, S. T. O'Hara, and P. J. McGovern
Reference mosaic for topographic maps of Triton
No full textReference mosaic for topographic maps of Triton. Description in and citation when using data: Schenk et al., (2021) Triton: Topography and Geology of a Probable Ocean World with Comparison to Pluto and Charon, Remote Sensing, 13, 3476-3490
Habitability of Martian Noachian Hydrothermal Systems as Constrained by a Terrestrial Analog on the Colorado Plateau
No full textVolcanic features and impact craters are ubiquitous features on Mars, and hydrothermal systems associated with the production of these features should have been abundant in Mars's early history. These hydrothermal systems represent potentially habitable environments and are therefore a high priority for continued investigations of the Martian crust. Here we present a Mars analog study where basaltic magma intruded water-bearing sediments to produce a high-temperature (as high as ∼700°C) hydrothermal system, which we use to constrain the potential habitability of similar systems on Mars via mineralogy and geochemistry including S, C, and O isotopic systematicsJake R. Crandall, Justin Filiberto, Nicholas Castle, Sally L. Potter-McIntyre, Susanne P. Schwenzer ,Karen Olsson-Francis, and Scott Per