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Evidence for Multiple Diagenetic Episodes in Ancient Fluvial‐Lacustrine Sedimentary Rocks in Gale Crater, Mars
Full text linkWe present the mineralogy of four rocks determined by the CheMin X‐ray diffraction instrument onboard the rover. The results exhibit evidence of multiple diagenetic events, including aqueous alteration by warm groundwaters and a fluctuation of lake levels and evaporative events.C. N. Achilles, E. B. Rampe, R. T. Downs, T. F. Bristow, D. W. Ming, R. V. Morris, D. T. Vaniman, D. F. Blake, A. S. Yen, A. C. McAdam, B. Sutter, C. M. Fedo, S. Gwizd, L. M. Thompson, R. Gellert, S. M. Morrison, A. H. Treiman, J. A. Crisp, T. S. J. Gabriel, S. J. Chipera, R.M. Hazen, P. I. Craig, M. T. Thorpe, D. J. Des Marais, J. P. Grotzinger, V. M. Tu, N. Castle, G. W. Downs, T. S. Peretyazhko, R. C. Walroth, P. Sarrazin, and J. M. Morookia
Sixth Intl Planetary Dunes Workshop 2020 (LPI Contrib. No. 2188)
No full textCovers aeolian processes that form and maintain dune fields on Earth and other planetary bodies within the solar system.Convener Timothy TitusPARTIAL CONTENTS: Protodunes on Mars / S. Diniega, J. Nield, G. Wiggs, and M. Baddock -- Seasonal Dark Dune Spots and Dark Dune Spot Flows in the Southern Latitudes of Mars / C. L. Dinwiddie and T. N. Titus -- Intracrater Sediment Trapping and Transport in Arabia Terra / T. C Dorn and M. D. Day -- A Unified Model of Ripples and Dunes in Water and Planetary Environments / O. Duran Vinent, B. Andreotti, P. Claudin, and C. Winter -- Adding New, Smaller Dune Fields to the Mars Global Digital Dune Database Inventory / L. K. Fenton -- Pattern Evolution in Transverse Aeolian Ridges (TARs) in Scandia Cavi, Mars / L. K. Fenton, S. Silvestro, and G. Kocurek -- Small Ventifacts at Great Sand Dunes, Colorado, A New Source for Mars Analogues / S. G. Fryberger and A. D. Valdez -- Spatial and Temporal Development of the Dune Instability at White Sands Dune Field, New Mexico, USA / C. Gadal, C. Narteau, R. C. Ewing, A. Gunn, D. Jerolmack, B. Andreotti, and P. Claudin -- Planetary Geoscience Map Gateway: Implementation of the Mars Global Digital Dune Database / A. L. Gullikson, M. A. Hunter, T. N. Titus, and C. Okubo -- Dust Devils on Titan / B. Jackson, R. D. Lorenz, J. W. Barnes, and M. Szurgot -- The Mineralogy and Thermophysical Properties of Dunes on Mars: Implications for the Age and Origin of Martian Sand / A. R. Khuller and S. Diniega -- Aeolian Sediments and Forms Along the Opportunity Rover Traverse / J. Kozakiewicz, L. Nowak, G. Nowinski, M. Sobucki, and N. Frodyma -- Slopes of Dune Slip Faces on the Earth and Mars / M. A. Kreslavsky and A. I. Ermakov -- Sand Distribution and Possible Surface Albedo Influences in the Shangri-La Sand Sea of Titan / B. D. Lake, J. Radebaugh, E. H. Christiansen, D. Rose, J. W. Barnes, and E. P. Turtle -- Namib Analogs to Titan Dunes: High Resolution Satellite Topography / R. D. Lorenz, C. A. Sawyer, D. S. Adams, N. L. Mehta, and E. P. Turtle -- Prospects for Abrasion on Titan / S. M. MacKenzie, K. Runyon, R. D. Lorenz, X. Yu, and J. Radebaugh -- Yardang Shapes Reveal Substrate Lithology and Material Properties in the Argentinian Puna / D. McDougall, J. Radebaugh, L. Kerber, J. Sevy, J. Rabinovitch, and E. H. Christiansen
Apollo-Earth Day Connection Earthrise
No full textEarthrise as imaged by the Lunar Reconnaissance Orbiter. Quote by Jim Lovell
Probing the hydrothermal system of the Chicxulub Impact Crater
No full textThe ~180-km-diameter Chicxulub peak-ring crater and ~240-km multiring basin, produced by the impact that terminated the Cretaceous, is the largest remaining intact impact basin on Earth. International Ocean Discovery Program (IODP) and International Continental Scientific Drilling Program (ICDP) Expedition 364 drilled to a depth of 1335 m below the sea floor into the peak ring, providing a unique opportunity to study the thermal and chemical modification of Earth's crust caused by the impact. The recovered core shows the crater hosted a spatially extensive hydrothermal system that chemically and mineralogically modified ~1.4 × 105 km3 of Earth's crust, a volume more than nine times that of the Yellowstone Caldera system. Initially, high temperatures of 300° to 400°C and an independent geomagnetic polarity clock indicate the hydrothermal system was long lived, in excess of 106 years.The Chicxulub impact event generated a long-duration hydrothermal system suitable for microbial life.David A. Kring, Sonia M. Tikoo, Martin Schmieder, Ulrich Riller, Mario Rebolledo-Vieyra, Sarah L. Simpson, Gordon R. Osinski, Jérôme Gattacceca, Axel Wittmann, Christina M. Verhagen, Charles S. Cockell, Marco J. L. Coolen, Fred J. Longstaffe, Sean P. S. Gulick, Joanna V. Morgan, Timothy J. Bralower, Elise Chenot, Gail L. Christeson, Philippe Claeys, Ludovic Ferrière, Catalina Gebhardt, Kazuhisa Goto, Sophie L. Green, Heather Jones, Johanna Lofi, Christopher M. Lowery, Rubén Ocampo-Torres, Ligia Perez-Cruz, Annemarie E. Pickersgill, Michael H. Poelchau, Auriol S. P. Rae,, Cornelia Rasmussen,, Honami Sato, Jan Smit, Naotaka Tomioka, Jaime Urrutia-Fucugauchi, Michael T. Whalen, Long Xiao, Kosei E. Yamaguch
Unified Geologic Map of the Moon
No full textThis new work represents a seamless, globally consistent, 1:5,000,000-scale geologic map derived from the six digitally renovated geologic maps. The goal of this project was to create a digital resource for science research and analysis, future geologic mapping efforts, be it local-, regional-, or global-scale products, and as a resource for the educators and the public interested in lunar geology. Here we present the completed mapping project as unit contacts, geologic unit polygons, linear features, and unit and feature nomenclature annotation. The product overlies shaded-relief products derived from SELENE Kaguya terrain camera stereo (equatorial, ~60 m/pix) and LOLA altimetry (north and south polar, 100 m/pix).Version
Laboratory Studies in Support of Venus Exploration: Surface and Near-Surface
No full textLaboratory experiments are crucial adjuncts to NASA's spacecraft exploration program, because spacecraft observations and data commonly can only be understood by comparison with controlled studies of analog materials in the laboratory. This assertion is especially true for Venus, where the atmosphere composition and surface conditions are unlike any place else in the solar system and are difficult to model (with few terrestrial analogs). The Decadal Survey can help advance Venus science by continuing its past support for laboratory experimental and analytical studies
Toward More Realistic Simulation and Prediction of Dust Storms on Mars
No full textTo make progress in the next decade, we make four Recommendations in order of priority: #1. Properly accommodate a minimum payload of meteorological and aeolian sensors on future Mars surface missions; #2. Continue orbital monitoring of the evolving surface dust distribution; #3. Expand orbital measurements to include winds and full diurnal coverage; and #4. Continue orbital monitoring and add surface measurements of aerosols during dust storms.Written by: Claire E. Newman (Aeolis Res.) Tanguy Bertrand (NASA Ames) Joseph Battalio (Yale Univ.) Mackenzie Day (UCLA) Manuel de la Torre Juárez (JPL) Meredith K. Elrod (NASA GSFC) Francesca Esposito (INAF-OAC) Lori Fenton (SETI Inst.) Claus Gebhardt (UAEU) Steven J. Greybush (Penn. State) Scott D. Guzewich (NASA GSFC) Henrik Kahanpää (FMI) Melinda Kahre (NASA Ames) Özgür Karatekin (Royal Obs. Belg.) Brian Jackson (Boise State Univ.) Mathieu Lapotre (Stanford Univ.) Christopher Lee (Aeolis Res.) Stephen R. Lewis (Open Univ.) Ralph D. Lorenz (APL) Germán Martínez Martínez (LPI) Javier Martin-Torres (Aberdeen U.) Michael A. Mischna (JPL) Luca Montabone (SSI) Lynn Neakrase (New Mexico State) Alexey Pankine (SSI) Jorge Pla-Garcia (CAB/SwRI/SSI) Peter L. Read (Univ. of Oxford) Isaac B. Smith (PSI/York Univ.) Michael D. Smith (NASA GSFC) Alejandro Soto (SwRI) Aymeric Spiga (Sorbonne Univ.) Christy Swann (NRL SSC) Leslie Tamppari (JPL) Orkun Temel (Royal Obs. Belgium) Daniel Viudez Moreiras (CAB) Danika Wellington (Ariz. State) Paulina Wolkenberg (INAF) Gerhard Wurm (Duisburg-Essen) María-Paz Zorzano (CAB
Artemis 3 EVA Opportunities on Malapert and Leibnitz Beta Massifs
No full textIf Artemis III astronauts land on Malapert or Leibnitz β, the exploration and science rationales developed previously apply. If, however, they are limited to a 2 km walking EVA, the breadth of the science to be addressed will be considerably smaller. In the Constellation Lunar Surface Systems study, communication relay, solar power, and seismometer stations were to be deployed and a heat probe inserted into the regolith. The same can occur at an Artemis III landing site
Apollo-Earth Day Connection blue marble
No full textEarth image captured in 2002 with the Moderate Resolution Imagining Spectroradiometer (MODIS) onboard NASA's Terra satellite
Uranian Satellites - Global Mosaics and DEMs
No full textGlobal mosaics and Digital elevation Models of Uranian Satellite