1
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Tice MM, Hurowitz JA, Allwood AC, Jones MWM, Orenstein BJ, Davidoff S, Wright AP, Pedersen DA, Henneke J, Tosca NJ, Moore KR, Clark BC, McLennan SM, Flannery DT, Steele A, Brown AJ, Zorzano MP, Hickman-Lewis K, Liu Y, VanBommel SJ, Schmidt ME, Kizovski TV, Treiman AH, O’Neil L, Fairén AG, Shuster DL, Gupta S. Alteration history of Séítah formation rocks inferred by PIXL x-ray fluorescence, x-ray diffraction, and multispectral imaging on Mars. SCIENCE ADVANCES 2022; 8:eabp9084. [PMID: 36417516 PMCID: PMC9683721 DOI: 10.1126/sciadv.abp9084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Collocated crystal sizes and mineral identities are critical for interpreting textural relationships in rocks and testing geological hypotheses, but it has been previously impossible to unambiguously constrain these properties using in situ instruments on Mars rovers. Here, we demonstrate that diffracted and fluoresced x-rays detected by the PIXL instrument (an x-ray fluorescence microscope on the Perseverance rover) provide information about the presence or absence of coherent crystalline domains in various minerals. X-ray analysis and multispectral imaging of rocks from the Séítah formation on the floor of Jezero crater shows that they were emplaced as coarsely crystalline igneous phases. Olivine grains were then partially dissolved and filled by finely crystalline or amorphous secondary silicate, carbonate, sulfate, and chloride/oxychlorine minerals. These results support the hypothesis that Séítah formation rocks represent olivine cumulates altered by fluids far from chemical equilibrium at low water-rock ratios.
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Affiliation(s)
- Michael M. Tice
- Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843, USA
| | - Joel A. Hurowitz
- Department of Geosciences, Stony Brook University, Stony Brook, NY 11794-2100, USA
| | - Abigail C. Allwood
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
| | - Michael W. M. Jones
- School of Chemistry and Physics and Central Analytical Research Facility, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Brendan J. Orenstein
- School of Earth and Atmospheric Sciences, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Scott Davidoff
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
| | - Austin P. Wright
- School of Computational Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - David A.K. Pedersen
- Technical University of Denmark, DTU Space, Department of Measurement and Instrumentation, Kongbens Lyngby, 2800, Denmark
| | - Jesper Henneke
- Technical University of Denmark, DTU Space, Department of Measurement and Instrumentation, Kongbens Lyngby, 2800, Denmark
| | - Nicholas J. Tosca
- Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK
| | - Kelsey R. Moore
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
| | | | - Scott M. McLennan
- Department of Geosciences, Stony Brook University, Stony Brook, NY 11794-2100, USA
| | - David T. Flannery
- School of Earth and Atmospheric Sciences, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Andrew Steele
- Earth and Planetary Laboratory, Carnegie Institution for Science, Washington, DC 20015, USA
| | | | - Maria-Paz Zorzano
- Centro de Astrobiologia, Instituto National de Tecnica Aerospacial, Madrid, Spain
| | | | - Yang Liu
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
| | - Scott J. VanBommel
- McDonnell Center for the Space Sciences, Department of Earth and Planetary Sciences, Washington University of St. Louis, St. Louis, MO 63130, USA
| | - Mariek E. Schmidt
- Department of Earth Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Tanya V. Kizovski
- Department of Earth Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
| | | | - Lauren O’Neil
- Department of Earth and Space Sciences, University of Washington, Seattle, WA 98052, USA
| | - Alberto G. Fairén
- Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, Madrid, Spain
- Department of Astronomy, Cornell University, Ithaca, NY 14850, USA
| | - David L. Shuster
- Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, USA
| | - Sanjeev Gupta
- Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK
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2
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Nikitczuk MP, Bebout GE, Geiger CA, Ota T, Kunihiro T, Mustard JF, Halldórsson SA, Nakamura E. Nitrogen Incorporation in Potassic and Micro- and Meso-Porous Minerals: Potential Biogeochemical Records and Targets for Mars Sampling. ASTROBIOLOGY 2022; 22:1293-1309. [PMID: 36074082 PMCID: PMC9618379 DOI: 10.1089/ast.2021.0158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
We measured the N concentrations and isotopic compositions of 44 samples of terrestrial potassic and micro- and meso-porous minerals and a small number of whole-rocks to determine the extent to which N is incorporated and stored during weathering and low-temperature hydrothermal alteration in Mars surface/near-surface environments. The selection of these minerals and other materials was partly guided by the study of altered volcanic glass from Antarctica and Iceland, in which the incorporation of N as NH4+ in phyllosilicates is indicated by correlated concentrations of N and the LILEs (i.e., K, Ba, Rb, Cs), with scatter likely related to the presence of exchanged, occluded/trapped, or encapsulated organic/inorganic N occurring within structural cavities (e.g., in zeolites). The phyllosilicates, zeolites, and sulfates analyzed in this study contain between 0 and 99,120 ppm N and have δ15Nair values of -34‰ to +65‰. Most of these minerals, and the few siliceous hydrothermal deposits that were analyzed, have δ15N consistent with the incorporation of biologically processed N during low-temperature hydrothermal or weathering processes. Secondary ion mass spectrometry on altered hyaloclastites demonstrates the residency of N in smectites and zeolites, and silica. We suggest that geological materials known on Earth to incorporate and store N and known to be abundant at, or near, the surface of Mars should be considered targets for upcoming Mars sample return with the intent to identify any signs of ancient or modern life.
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Affiliation(s)
- Matthew P. Nikitczuk
- Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania, USA
| | - Gray E. Bebout
- Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania, USA
- Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University, Misasa, Japan
| | - Charles A. Geiger
- Universität Salzburg, Fachbereich Chemie und Physik der Materialien, Salzburg, Austria
| | - Tsutomu Ota
- Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University, Misasa, Japan
| | - Takuya Kunihiro
- Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University, Misasa, Japan
| | - John F. Mustard
- Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island, USA
| | - Sæmundur A. Halldórsson
- Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Reykjavík, Iceland
| | - Eizo Nakamura
- Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University, Misasa, Japan
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3
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Osterhout JT, Schopf JW, Kudryavtsev AB, Czaja AD, Williford KH. Deep-UV Raman Spectroscopy of Carbonaceous Precambrian Microfossils: Insights into the Search for Past Life on Mars. ASTROBIOLOGY 2022; 22:1239-1254. [PMID: 36194869 DOI: 10.1089/ast.2021.0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The current strategy for detecting evidence of ancient life on Mars-a primary goal of NASA's ongoing Mars 2020 mission-is based largely on knowledge of Precambrian life and of its preservation in Earth's early rock record. The fossil record of primitive microorganisms consists mainly of stromatolites and other microbially influenced sedimentary structures, which occasionally preserve microfossils or other geochemical traces of life. Raman spectroscopy is an invaluable tool for identifying such signs of life and is routinely performed on Precambrian microfossils to help establish their organic composition, degree of thermal maturity, and biogenicity. The Mars 2020 rover, Perseverance, is equipped with a deep-ultraviolet (UV) Raman spectrometer as part of the SHERLOC (Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals) instrument, which will be used in part to characterize the preservation of organic matter in the ancient sedimentary rocks of Jezero crater and therein search for possible biosignatures. To determine the deep-UV Raman spectra characteristic of ancient microbial fossils, this study analyzes individual microfossils from 14 Precambrian cherts using deep-UV (244 nm) Raman spectroscopy. Spectra obtained were measured and calibrated relative to a graphitic standard and categorized according to the morphology and depositional environment of the fossil analyzed and its Raman-indicated thermal maturity. All acquired spectra of the fossil kerogens include a considerably Raman-enhanced and prominent first-order Raman G-band (∼1600 cm-1), whereas its commonly associated D-band (∼1350 cm-1) is restricted to specimens of lower thermal maturity (below greenschist facies) that thus have the less altered biosignature indicative of relatively well-preserved organic matter. If comparably preserved, similar characteristics would be expected to be exhibited by microfossils or ancient organic matter in rock samples collected and cached on Mars in preparation for future sample return to Earth.
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Affiliation(s)
- Jeffrey T Osterhout
- Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USA
- Center for the Study of Evolution and the Origin of Life, University of California, Los Angeles, California, USA
| | - J William Schopf
- Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USA
- Center for the Study of Evolution and the Origin of Life, University of California, Los Angeles, California, USA
| | - Anatoliy B Kudryavtsev
- Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USA
- Center for the Study of Evolution and the Origin of Life, University of California, Los Angeles, California, USA
| | - Andrew D Czaja
- Department of Geology, University of Cincinnati, Cincinnati, Ohio, USA
| | - Kenneth H Williford
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
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4
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Bell JF, Maki JN, Mehall GL, Ravine MA, Caplinger MA, Bailey ZJ, Brylow S, Schaffner JA, Kinch KM, Madsen MB, Winhold A, Hayes AG, Corlies P, Tate C, Barrington M, Cisneros E, Jensen E, Paris K, Crawford K, Rojas C, Mehall L, Joseph J, Proton JB, Cluff N, Deen RG, Betts B, Cloutis E, Coates AJ, Colaprete A, Edgett KS, Ehlmann BL, Fagents S, Grotzinger JP, Hardgrove C, Herkenhoff KE, Horgan B, Jaumann R, Johnson JR, Lemmon M, Paar G, Caballo-Perucha M, Gupta S, Traxler C, Preusker F, Rice MS, Robinson MS, Schmitz N, Sullivan R, Wolff MJ. The Mars 2020 Perseverance Rover Mast Camera Zoom (Mastcam-Z) Multispectral, Stereoscopic Imaging Investigation. SPACE SCIENCE REVIEWS 2021; 217:24. [PMID: 33612866 PMCID: PMC7883548 DOI: 10.1007/s11214-020-00755-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/25/2020] [Indexed: 05/16/2023]
Abstract
Mastcam-Z is a multispectral, stereoscopic imaging investigation on the Mars 2020 mission's Perseverance rover. Mastcam-Z consists of a pair of focusable, 4:1 zoomable cameras that provide broadband red/green/blue and narrowband 400-1000 nm color imaging with fields of view from 25.6° × 19.2° (26 mm focal length at 283 μrad/pixel) to 6.2° × 4.6° (110 mm focal length at 67.4 μrad/pixel). The cameras can resolve (≥ 5 pixels) ∼0.7 mm features at 2 m and ∼3.3 cm features at 100 m distance. Mastcam-Z shares significant heritage with the Mastcam instruments on the Mars Science Laboratory Curiosity rover. Each Mastcam-Z camera consists of zoom, focus, and filter wheel mechanisms and a 1648 × 1214 pixel charge-coupled device detector and electronics. The two Mastcam-Z cameras are mounted with a 24.4 cm stereo baseline and 2.3° total toe-in on a camera plate ∼2 m above the surface on the rover's Remote Sensing Mast, which provides azimuth and elevation actuation. A separate digital electronics assembly inside the rover provides power, data processing and storage, and the interface to the rover computer. Primary and secondary Mastcam-Z calibration targets mounted on the rover top deck enable tactical reflectance calibration. Mastcam-Z multispectral, stereo, and panoramic images will be used to provide detailed morphology, topography, and geologic context along the rover's traverse; constrain mineralogic, photometric, and physical properties of surface materials; monitor and characterize atmospheric and astronomical phenomena; and document the rover's sample extraction and caching locations. Mastcam-Z images will also provide key engineering information to support sample selection and other rover driving and tool/instrument operations decisions.
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Affiliation(s)
| | | | | | - M. A. Ravine
- Malin Space Science Systems, Inc., San Diego, CA USA
| | | | | | - S. Brylow
- Malin Space Science Systems, Inc., San Diego, CA USA
| | | | | | | | | | | | | | - C. Tate
- Cornell Univ., Ithaca, NY USA
| | | | | | - E. Jensen
- Malin Space Science Systems, Inc., San Diego, CA USA
| | - K. Paris
- Arizona State Univ., Tempe, AZ USA
| | | | - C. Rojas
- Arizona State Univ., Tempe, AZ USA
| | | | | | | | - N. Cluff
- Arizona State Univ., Tempe, AZ USA
| | | | - B. Betts
- The Planetary Society, Pasadena, CA USA
| | | | - A. J. Coates
- Mullard Space Science Laboratory, Univ. College, London, UK
| | - A. Colaprete
- NASA/Ames Research Center, Moffett Field, CA USA
| | - K. S. Edgett
- Malin Space Science Systems, Inc., San Diego, CA USA
| | - B. L. Ehlmann
- JPL/Caltech, Pasadena, CA USA
- Caltech, Pasadena, CA USA
| | | | | | | | | | | | - R. Jaumann
- Inst. of Geological Sciences, Free University Berlin, Berlin, Germany
| | | | - M. Lemmon
- Space Science Inst., Boulder, CO USA
| | - G. Paar
- Joanneum Research, Graz, Austria
| | | | | | | | - F. Preusker
- DLR/German Aerospace Center, Berlin, Germany
| | - M. S. Rice
- Western Washington Univ., Bellingham, WA USA
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5
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Stack KM, Williams NR, Calef F, Sun VZ, Williford KH, Farley KA, Eide S, Flannery D, Hughes C, Jacob SR, Kah LC, Meyen F, Molina A, Nataf CQ, Rice M, Russell P, Scheller E, Seeger CH, Abbey WJ, Adler JB, Amundsen H, Anderson RB, Angel SM, Arana G, Atkins J, Barrington M, Berger T, Borden R, Boring B, Brown A, Carrier BL, Conrad P, Dypvik H, Fagents SA, Gallegos ZE, Garczynski B, Golder K, Gomez F, Goreva Y, Gupta S, Hamran SE, Hicks T, Hinterman ED, Horgan BN, Hurowitz J, Johnson JR, Lasue J, Kronyak RE, Liu Y, Madariaga JM, Mangold N, McClean J, Miklusicak N, Nunes D, Rojas C, Runyon K, Schmitz N, Scudder N, Shaver E, SooHoo J, Spaulding R, Stanish E, Tamppari LK, Tice MM, Turenne N, Willis PA, Yingst RA. Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team. SPACE SCIENCE REVIEWS 2020; 216:127. [PMID: 33568875 DOI: 10.1007/s11214-020-00762-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 11/09/2020] [Indexed: 05/29/2023]
Abstract
The Mars 2020 Perseverance rover landing site is located within Jezero crater, a ∼ 50 km diameter impact crater interpreted to be a Noachian-aged lake basin inside the western edge of the Isidis impact structure. Jezero hosts remnants of a fluvial delta, inlet and outlet valleys, and infill deposits containing diverse carbonate, mafic, and hydrated minerals. Prior to the launch of the Mars 2020 mission, members of the Science Team collaborated to produce a photogeologic map of the Perseverance landing site in Jezero crater. Mapping was performed at a 1:5000 digital map scale using a 25 cm/pixel High Resolution Imaging Science Experiment (HiRISE) orthoimage mosaic base map and a 1 m/pixel HiRISE stereo digital terrain model. Mapped bedrock and surficial units were distinguished by differences in relative brightness, tone, topography, surface texture, and apparent roughness. Mapped bedrock units are generally consistent with those identified in previously published mapping efforts, but this study's map includes the distribution of surficial deposits and sub-units of the Jezero delta at a higher level of detail than previous studies. This study considers four possible unit correlations to explain the relative age relationships of major units within the map area. Unit correlations include previously published interpretations as well as those that consider more complex interfingering relationships and alternative relative age relationships. The photogeologic map presented here is the foundation for scientific hypothesis development and strategic planning for Perseverance's exploration of Jezero crater.
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Affiliation(s)
- Kathryn M Stack
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Nathan R Williams
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Fred Calef
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Vivian Z Sun
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Kenneth H Williford
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - David Flannery
- Queensland University of Technology, Brisbane, Queensland, Australia
| | - Cory Hughes
- Western Washington University, Bellingham, WA, USA
| | | | - Linda C Kah
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Antonio Molina
- Centro de Astrobiología, CAB (INTA, CSIC), Madrid, Spain
| | | | - Melissa Rice
- Queensland University of Technology, Brisbane, Queensland, Australia
| | | | - Eva Scheller
- California Institute of Technology, Pasadena, CA, USA
| | | | - William J Abbey
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Hans Amundsen
- Earth and Planetary Exploration Services, Berlin, Germany
| | | | | | - Gorka Arana
- University of the Basque Country (UPV/EHU), Leioa, Bizkaia, Spain
| | - James Atkins
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Tor Berger
- Forsvarets forskingsinstitutt, Kjeller, Norway
| | - Rose Borden
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Beau Boring
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Brandi L Carrier
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Pamela Conrad
- Carnegie Institution for Science, Washington, D.C., USA
| | | | | | | | | | - Keenan Golder
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Felipe Gomez
- Centro de Astrobiología, CAB (INTA, CSIC), Madrid, Spain
| | - Yulia Goreva
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - Taryn Hicks
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | | | - Joel Hurowitz
- State University of New York-Stony Brook, Stony Brook, NY, USA
| | | | - Jeremie Lasue
- Institut de Recherche en Astrophysique et Planetologie (IRAP), Université de Toulouse, Paul Sabatier, Toulouse, France
| | - Rachel E Kronyak
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Yang Liu
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Nicolas Mangold
- Laboratoire Planétologie et Géodynamique, UMR 6112, CNRS, Université de Nantes, Nantes, France
| | | | | | - Daniel Nunes
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Kirby Runyon
- Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA
| | - Nicole Schmitz
- Deutsches Zentrum Fuer Luft- und Raumfahrt E.V., Cologne, Germany
| | | | - Emily Shaver
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Jason SooHoo
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Evan Stanish
- University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Leslie K Tamppari
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - Peter A Willis
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
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6
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Stack KM, Williams NR, Calef F, Sun VZ, Williford KH, Farley KA, Eide S, Flannery D, Hughes C, Jacob SR, Kah LC, Meyen F, Molina A, Nataf CQ, Rice M, Russell P, Scheller E, Seeger CH, Abbey WJ, Adler JB, Amundsen H, Anderson RB, Angel SM, Arana G, Atkins J, Barrington M, Berger T, Borden R, Boring B, Brown A, Carrier BL, Conrad P, Dypvik H, Fagents SA, Gallegos ZE, Garczynski B, Golder K, Gomez F, Goreva Y, Gupta S, Hamran SE, Hicks T, Hinterman ED, Horgan BN, Hurowitz J, Johnson JR, Lasue J, Kronyak RE, Liu Y, Madariaga JM, Mangold N, McClean J, Miklusicak N, Nunes D, Rojas C, Runyon K, Schmitz N, Scudder N, Shaver E, SooHoo J, Spaulding R, Stanish E, Tamppari LK, Tice MM, Turenne N, Willis PA, Yingst RA. Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team. SPACE SCIENCE REVIEWS 2020; 216:127. [PMID: 33568875 PMCID: PMC7116714 DOI: 10.1007/s11214-020-00739-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/25/2020] [Indexed: 05/28/2023]
Abstract
The Mars 2020 Perseverance rover landing site is located within Jezero crater, a ∼ 50 km diameter impact crater interpreted to be a Noachian-aged lake basin inside the western edge of the Isidis impact structure. Jezero hosts remnants of a fluvial delta, inlet and outlet valleys, and infill deposits containing diverse carbonate, mafic, and hydrated minerals. Prior to the launch of the Mars 2020 mission, members of the Science Team collaborated to produce a photogeologic map of the Perseverance landing site in Jezero crater. Mapping was performed at a 1:5000 digital map scale using a 25 cm/pixel High Resolution Imaging Science Experiment (HiRISE) orthoimage mosaic base map and a 1 m/pixel HiRISE stereo digital terrain model. Mapped bedrock and surficial units were distinguished by differences in relative brightness, tone, topography, surface texture, and apparent roughness. Mapped bedrock units are generally consistent with those identified in previously published mapping efforts, but this study's map includes the distribution of surficial deposits and sub-units of the Jezero delta at a higher level of detail than previous studies. This study considers four possible unit correlations to explain the relative age relationships of major units within the map area. Unit correlations include previously published interpretations as well as those that consider more complex interfingering relationships and alternative relative age relationships. The photogeologic map presented here is the foundation for scientific hypothesis development and strategic planning for Perseverance's exploration of Jezero crater.
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Affiliation(s)
- Kathryn M Stack
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Nathan R Williams
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Fred Calef
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Vivian Z Sun
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Kenneth H Williford
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - David Flannery
- Queensland University of Technology, Brisbane, Queensland, Australia
| | - Cory Hughes
- Western Washington University, Bellingham, WA, USA
| | | | - Linda C Kah
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Antonio Molina
- Centro de Astrobiología, CAB (INTA, CSIC), Madrid, Spain
| | | | - Melissa Rice
- Queensland University of Technology, Brisbane, Queensland, Australia
| | | | - Eva Scheller
- California Institute of Technology, Pasadena, CA, USA
| | | | - William J Abbey
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Hans Amundsen
- Earth and Planetary Exploration Services, Berlin, Germany
| | | | | | - Gorka Arana
- University of the Basque Country (UPV/EHU), Leioa, Bizkaia, Spain
| | - James Atkins
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Tor Berger
- Forsvarets forskingsinstitutt, Kjeller, Norway
| | - Rose Borden
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Beau Boring
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | - Brandi L Carrier
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Pamela Conrad
- Carnegie Institution for Science, Washington, D.C., USA
| | | | | | | | | | - Keenan Golder
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Felipe Gomez
- Centro de Astrobiología, CAB (INTA, CSIC), Madrid, Spain
| | - Yulia Goreva
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - Taryn Hicks
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | | | | | - Joel Hurowitz
- State University of New York-Stony Brook, Stony Brook, NY, USA
| | | | - Jeremie Lasue
- Institut de Recherche en Astrophysique et Planetologie (IRAP), Université de Toulouse, Paul Sabatier, Toulouse, France
| | - Rachel E Kronyak
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | - Yang Liu
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Nicolas Mangold
- Laboratoire Planétologie et Géodynamique, UMR 6112, CNRS, Université de Nantes, Nantes, France
| | | | | | - Daniel Nunes
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | - Kirby Runyon
- Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA
| | - Nicole Schmitz
- Deutsches Zentrum Fuer Luft- und Raumfahrt E.V., Cologne, Germany
| | | | - Emily Shaver
- University of Tennessee-Knoxville, Knoxville, TN, USA
| | - Jason SooHoo
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Evan Stanish
- University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Leslie K Tamppari
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
| | | | | | - Peter A Willis
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
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Ruff SW, Campbell KA, Van Kranendonk MJ, Rice MS, Farmer JD. The Case for Ancient Hot Springs in Gusev Crater, Mars. ASTROBIOLOGY 2020; 20:475-499. [PMID: 31621375 PMCID: PMC7133449 DOI: 10.1089/ast.2019.2044] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 09/11/2019] [Indexed: 05/19/2023]
Abstract
The origin and age of opaline silica deposits discovered by the Spirit rover adjacent to the Home Plate feature in the Columbia Hills of Gusev crater remains debated, in part because of their proximity to sulfur-rich soils. Processes related to fumarolic activity and to hot springs and/or geysers are the leading candidates. Both processes are known to produce opaline silica on Earth, but with differences in composition, morphology, texture, and stratigraphy. Here, we incorporate new and existing observations of the Home Plate region with observations from field and laboratory work to address the competing hypotheses. The results, which include new evidence for a hot spring vent mound, demonstrate that a volcanic hydrothermal system manifesting both hot spring/geyser and fumarolic activity best explains the opaline silica rocks and proximal S-rich materials, respectively. The opaline silica rocks most likely are sinter deposits derived from hot spring activity. Stratigraphic evidence indicates that their deposition occurred before the emplacement of the volcaniclastic deposits comprising Home Plate and nearby ridges. Because sinter deposits throughout geologic history on Earth preserve evidence for microbial life, they are a key target in the search for ancient life on Mars.
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Affiliation(s)
- Steven W. Ruff
- School of Earth and Space Exploration, Arizona State University, Tempe, Arizona
- Address correspondence to: Steven W. Ruff, School of Earth and Space Exploration, Arizona State University, Mars Space Flight Facility, Moeur Building Room 131, Tempe, AZ 85287-6305
| | - Kathleen A. Campbell
- School of Environment and Te Ao Mārama—Centre for Fundamental Inquiry, The University of Auckland, Auckland, New Zealand
| | - Martin J. Van Kranendonk
- Australian Centre for Astrobiology, School of Biological, Earth and Environmental Sciences, University of New South Wales Sydney, Sydney, Australia
| | - Melissa S. Rice
- Department of Geology, Western Washington University, Bellingham, Washington
| | - Jack D. Farmer
- School of Earth and Space Exploration, Arizona State University, Tempe, Arizona
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Ruff SW, Farmer JD. Silica deposits on Mars with features resembling hot spring biosignatures at El Tatio in Chile. Nat Commun 2016; 7:13554. [PMID: 27853166 PMCID: PMC5473637 DOI: 10.1038/ncomms13554] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 10/13/2016] [Indexed: 11/09/2022] Open
Abstract
The Mars rover Spirit encountered outcrops and regolith composed of opaline silica (amorphous SiO2·nH2O) in an ancient volcanic hydrothermal setting in Gusev crater. An origin via either fumarole-related acid-sulfate leaching or precipitation from hot spring fluids was suggested previously. However, the potential significance of the characteristic nodular and mm-scale digitate opaline silica structures was not recognized. Here we report remarkably similar features within active hot spring/geyser discharge channels at El Tatio in northern Chile, where halite-encrusted silica yields infrared spectra that are the best match yet to spectra from Spirit. Furthermore, we show that the nodular and digitate silica structures at El Tatio that most closely resemble those on Mars include complex sedimentary structures produced by a combination of biotic and abiotic processes. Although fully abiotic processes are not ruled out for the Martian silica structures, they satisfy an a priori definition of potential biosignatures.
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Affiliation(s)
- Steven W Ruff
- School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287-6305, USA
| | - Jack D Farmer
- School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287-6305, USA
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Kinch KM, Bell JF, Goetz W, Johnson JR, Joseph J, Madsen MB, Sohl-Dickstein J. Dust deposition on the decks of the Mars Exploration Rovers: 10 years of dust dynamics on the Panoramic Camera calibration targets. EARTH AND SPACE SCIENCE (HOBOKEN, N.J.) 2015; 2:144-172. [PMID: 27981072 PMCID: PMC5125412 DOI: 10.1002/2014ea000073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/09/2015] [Accepted: 03/26/2015] [Indexed: 05/13/2023]
Abstract
The Panoramic Cameras on NASA's Mars Exploration Rovers have each returned more than 17,000 images of their calibration targets. In order to make optimal use of this data set for reflectance calibration, a correction must be made for the presence of air fall dust. Here we present an improved dust correction procedure based on a two-layer scattering model, and we present a dust reflectance spectrum derived from long-term trends in the data set. The dust on the calibration targets appears brighter than dusty areas of the Martian surface. We derive detailed histories of dust deposition and removal revealing two distinct environments: At the Spirit landing site, half the year is dominated by dust deposition, the other half by dust removal, usually in brief, sharp events. At the Opportunity landing site the Martian year has a semiannual dust cycle with dust removal happening gradually throughout two removal seasons each year. The highest observed optical depth of settled dust on the calibration target is 1.5 on Spirit and 1.1 on Opportunity (at 601 nm). We derive a general prediction for dust deposition rates of 0.004 ± 0.001 in units of surface optical depth deposited per sol (Martian solar day) per unit atmospheric optical depth. We expect this procedure to lead to improved reflectance-calibration of the Panoramic Camera data set. In addition, it is easily adapted to similar data sets from other missions in order to deliver improved reflectance calibration as well as data on dust reflectance properties and deposition and removal history.
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Affiliation(s)
- Kjartan M Kinch
- Niels Bohr Institute University of Copenhagen Copenhagen Denmark
| | - James F Bell
- School of Earth and Space Exploration Arizona State University Phoenix Arizona USA
| | - Walter Goetz
- Max Planck Institute for Solar System Research Göttingen Germany
| | - Jeffrey R Johnson
- Applied Physics Laboratory Johns Hopkins University Laurel Maryland USA
| | - Jonathan Joseph
- Department of Astronomy Cornell University Ithaca New York USA
| | - Morten Bo Madsen
- Niels Bohr Institute University of Copenhagen Copenhagen Denmark
| | - Jascha Sohl-Dickstein
- Neural Dynamics and Computation Laboratory Stanford University Stanford California USA
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An Alternative Approach to Mapping Thermophysical Units from Martian Thermal Inertia and Albedo Data Using a Combination of Unsupervised Classification Techniques. REMOTE SENSING 2014. [DOI: 10.3390/rs6065184] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zhou F, Arvidson RE, Bennett K, Trease B, Lindemann R, Bellutta P, Iagnemma K, Senatore C. Simulations of Mars Rover Traverses. J FIELD ROBOT 2013. [DOI: 10.1002/rob.21483] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Feng Zhou
- Department of Earth and Planetary Sciences; Washington University in St Louis; St Louis Missouri 63130
| | - Raymond E. Arvidson
- Department of Earth and Planetary Sciences; Washington University in St Louis; St Louis Missouri 63130
| | - Keith Bennett
- Department of Earth and Planetary Sciences; Washington University in St Louis; St Louis Missouri 63130
| | - Brian Trease
- California Institute of Technology/Jet Propulsion Laboratory; Pasadena California 91011
| | - Randel Lindemann
- California Institute of Technology/Jet Propulsion Laboratory; Pasadena California 91011
| | - Paolo Bellutta
- California Institute of Technology/Jet Propulsion Laboratory; Pasadena California 91011
| | - Karl Iagnemma
- Robotic Mobility Group; Massachusetts Institute of Technology; Cambridge Massachusetts 02139
| | - Carmine Senatore
- Robotic Mobility Group; Massachusetts Institute of Technology; Cambridge Massachusetts 02139
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Ruff SW, Farmer JD, Calvin WM, Herkenhoff KE, Johnson JR, Morris RV, Rice MS, Arvidson RE, Bell JF, Christensen PR, Squyres SW. Characteristics, distribution, origin, and significance of opaline silica observed by the Spirit rover in Gusev crater, Mars. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010je003767] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang A, Ling ZC. Ferric sulfates on Mars: A combined mission data analysis of salty soils at Gusev crater and laboratory experimental investigations. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010je003665] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Arvidson RE, Ashley JW, Bell JF, Chojnacki M, Cohen J, Economou TE, Farrand WH, Fergason R, Fleischer I, Geissler P, Gellert R, Golombek MP, Grotzinger JP, Guinness EA, Haberle RM, Herkenhoff KE, Herman JA, Iagnemma KD, Jolliff BL, Johnson JR, Klingelhöfer G, Knoll AH, Knudson AT, Li R, McLennan SM, Mittlefehldt DW, Morris RV, Parker TJ, Rice MS, Schröder C, Soderblom LA, Squyres SW, Sullivan RJ, Wolff MJ. Opportunity Mars Rover mission: Overview and selected results from Purgatory ripple to traverses to Endeavour crater. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010je003746] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Greeley R, Waller DA, Cabrol NA, Landis GA, Lemmon MT, Neakrase LDV, Pendleton Hoffer M, Thompson SD, Whelley PL. Gusev Crater, Mars: Observations of three dust devil seasons. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010je003608] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Arvidson RE, Bell JF, Bellutta P, Cabrol NA, Catalano JG, Cohen J, Crumpler LS, Des Marais DJ, Estlin TA, Farrand WH, Gellert R, Grant JA, Greenberger RN, Guinness EA, Herkenhoff KE, Herman JA, Iagnemma KD, Johnson JR, Klingelhöfer G, Li R, Lichtenberg KA, Maxwell SA, Ming DW, Morris RV, Rice MS, Ruff SW, Shaw A, Siebach KL, de Souza PA, Stroupe AW, Squyres SW, Sullivan RJ, Talley KP, Townsend JA, Wang A, Wright JR, Yen AS. Spirit Mars Rover Mission: Overview and selected results from the northern Home Plate Winter Haven to the side of Scamander crater. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010je003633] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Goetz W, Pike WT, Hviid SF, Madsen MB, Morris RV, Hecht MH, Staufer U, Leer K, Sykulska H, Hemmig E, Marshall J, Morookian JM, Parrat D, Vijendran S, Bos BJ, El Maarry MR, Keller HU, Kramm R, Markiewicz WJ, Drube L, Blaney D, Arvidson RE, Bell JF, Reynolds R, Smith PH, Woida P, Woida R, Tanner R. Microscopy analysis of soils at the Phoenix landing site, Mars: Classification of soil particles and description of their optical and magnetic properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009je003437] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Morris RV, Ruff SW, Gellert R, Ming DW, Arvidson RE, Clark BC, Golden DC, Siebach K, Klingelhöfer G, Schröder C, Fleischer I, Yen AS, Squyres SW. Identification of carbonate-rich outcrops on Mars by the Spirit rover. Science 2010; 329:421-4. [PMID: 20522738 DOI: 10.1126/science.1189667] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Decades of speculation about a warmer, wetter Mars climate in the planet's first billion years postulate a denser CO2-rich atmosphere than at present. Such an atmosphere should have led to the formation of outcrops rich in carbonate minerals, for which evidence has been sparse. Using the Mars Exploration Rover Spirit, we have now identified outcrops rich in magnesium-iron carbonate (16 to 34 weight percent) in the Columbia Hills of Gusev crater. Its composition approximates the average composition of the carbonate globules in martian meteorite ALH 84001. The Gusev carbonate probably precipitated from carbonate-bearing solutions under hydrothermal conditions at near-neutral pH in association with volcanic activity during the Noachian era.
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Seelos KD, Arvidson RE, Jolliff BL, Chemtob SM, Morris RV, Ming DW, Swayze GA. Silica in a Mars analog environment: Ka'u Desert, Kilauea Volcano, Hawaii. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009je003347] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chemtob SM, Jolliff BL, Rossman GR, Eiler JM, Arvidson RE. Silica coatings in the Ka'u Desert, Hawaii, a Mars analog terrain: A micromorphological, spectral, chemical, and isotopic study. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009je003473] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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The Mars Astrobiology Explorer-Cacher (MAX-C): a potential rover mission for 2018. Final report of the Mars Mid-Range Rover Science Analysis Group (MRR-SAG) October 14, 2009. ASTROBIOLOGY 2010; 10:127-163. [PMID: 20298148 DOI: 10.1089/ast.2010.0462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This report documents the work of the Mid-Range Rover Science Analysis Group (MRR-SAG), which was assigned to formulate a concept for a potential rover mission that could be launched to Mars in 2018. Based on programmatic and engineering considerations as of April 2009, our deliberations assumed that the potential mission would use the Mars Science Laboratory (MSL) sky-crane landing system and include a single solar-powered rover. The mission would also have a targeting accuracy of approximately 7 km (semimajor axis landing ellipse), a mobility range of at least 10 km, and a lifetime on the martian surface of at least 1 Earth year. An additional key consideration, given recently declining budgets and cost growth issues with MSL, is that the proposed rover must have lower cost and cost risk than those of MSL--this is an essential consideration for the Mars Exploration Program Analysis Group (MEPAG). The MRR-SAG was asked to formulate a mission concept that would address two general objectives: (1) conduct high priority in situ science and (2) make concrete steps toward the potential return of samples to Earth. The proposed means of achieving these two goals while balancing the trade-offs between them are described here in detail. We propose the name Mars Astrobiology Explorer-Cacher(MAX-C) to reflect the dual purpose of this potential 2018 rover mission.
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Murchie SL, Seelos FP, Hash CD, Humm DC, Malaret E, McGovern JA, Choo TH, Seelos KD, Buczkowski DL, Morgan MF, Barnouin-Jha OS, Nair H, Taylor HW, Patterson GW, Harvel CA, Mustard JF, Arvidson RE, McGuire P, Smith MD, Wolff MJ, Titus TN, Bibring JP, Poulet F. Compact Reconnaissance Imaging Spectrometer for Mars investigation and data set from the Mars Reconnaissance Orbiter's primary science phase. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009je003344] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Murchie SL, Mustard JF, Ehlmann BL, Milliken RE, Bishop JL, McKeown NK, Noe Dobrea EZ, Seelos FP, Buczkowski DL, Wiseman SM, Arvidson RE, Wray JJ, Swayze G, Clark RN, Des Marais DJ, McEwen AS, Bibring JP. A synthesis of Martian aqueous mineralogy after 1 Mars year of observations from the Mars Reconnaissance Orbiter. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009je003342] [Citation(s) in RCA: 356] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Morris RV, Klingelhöfer G, Schröder C, Fleischer I, Ming DW, Yen AS, Gellert R, Arvidson RE, Rodionov DS, Crumpler LS, Clark BC, Cohen BA, McCoy TJ, Mittlefehldt DW, Schmidt ME, de Souza PA, Squyres SW. Iron mineralogy and aqueous alteration from Husband Hill through Home Plate at Gusev Crater, Mars: Results from the Mössbauer instrument on the Spirit Mars Exploration Rover. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008je003201] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ming DW, Gellert R, Morris RV, Arvidson RE, Brückner J, Clark BC, Cohen BA, d'Uston C, Economou T, Fleischer I, Klingelhöfer G, McCoy TJ, Mittlefehldt DW, Schmidt ME, Schröder C, Squyres SW, Tréguier E, Yen AS, Zipfel J. Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008je003195] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang A, Bell JF, Li R, Johnson JR, Farrand WH, Cloutis EA, Arvidson RE, Crumpler L, Squyres SW, McLennan SM, Herkenhoff KE, Ruff SW, Knudson AT, Chen W, Greenberger R. Light-toned salty soils and coexisting Si-rich species discovered by the Mars Exploration Rover Spirit in Columbia Hills. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008je003126] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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