Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars
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- S. M. McLennan
- Department of Geosciences, State University of New York, Stony Brook, NY 11794, USA.
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- R. B. Anderson
- U.S. Geological Survey, Astrogeology Science Center, Flagstaff, AZ 86001, USA.
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- J. F. Bell
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA.
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- J. C. Bridges
- Space Research Centre, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK.
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- F. Calef
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
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- J. L. Campbell
- Department of Physics, University of Guelph, Guelph, ON N1G 2W1, Canada.
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- B. C. Clark
- Space Science Institute, Boulder, CO 80301, USA.
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- S. Clegg
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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- P. Conrad
- NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
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- A. Cousin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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- D. J. Des Marais
- Department of Space Sciences, NASA Ames Research Center, Moffett Field, CA 94035, USA.
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- G. Dromart
- Laboratoire de Geologié de Lyon, Université de Lyon, 69364 Lyon, France.
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- M. D. Dyar
- Department of Astronomy, Mt. Holyoke College, South Hadley, MA 01075, USA.
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- L. A. Edgar
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA.
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- B. L. Ehlmann
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
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- C. Fabre
- UMR 7359 CNRS-Georesources, Campus des Aiguillettes, Faculté des Sciences, BP 70239, 54506 Vandoeuvre Les Nancy Cedex, France.
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- O. Forni
- IRAP, Université de Toulouse (UPS-OMP)/CNRS, 9 Avenue du Colonel Roche, BP 44346, 31028 Toulouse Cedex 4, France.
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- O. Gasnault
- IRAP, Université de Toulouse (UPS-OMP)/CNRS, 9 Avenue du Colonel Roche, BP 44346, 31028 Toulouse Cedex 4, France.
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- R. Gellert
- Department of Physics, University of Guelph, Guelph, ON N1G 2W1, Canada.
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- S. Gordon
- Institute of Meteoritics, University of New Mexico, Albuquerque, NM 87131, USA.
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- J. A. Grant
- Center for Earth and Planetary Sciences, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, USA.
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- J. P. Grotzinger
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- S. Gupta
- Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK.
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- K. E. Herkenhoff
- U.S. Geological Survey, Astrogeology Science Center, Flagstaff, AZ 86001, USA.
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- J. A. Hurowitz
- Department of Geosciences, State University of New York, Stony Brook, NY 11794, USA.
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- P. L. King
- Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia.
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- S. Le Mouélic
- Laboratoire de Planétologie et Géodynamique, LPGN/CNRS UMR 6112 and Université de Nantes, 4432 Nantes, France.
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- L. A. Leshin
- School of Science, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
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- R. Léveillé
- Canadian Space Agency, St.-Hubert, QC J3Y 8Y9, Canada.
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- K. W. Lewis
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- N. Mangold
- Laboratoire de Planétologie et Géodynamique, LPGN/CNRS UMR 6112 and Université de Nantes, 4432 Nantes, France.
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- S. Maurice
- Observatoire Midi-Pyrenees, 31400 Toulouse, France.
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- D. W. Ming
- NASA Johnson Space Center, Houston, TX 77058, USA.
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- R. V. Morris
- NASA Johnson Space Center, Houston, TX 77058, USA.
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- M. Nachon
- Laboratoire de Planétologie et Géodynamique, LPGN/CNRS UMR 6112 and Université de Nantes, 4432 Nantes, France.
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- H. E. Newsom
- Institute of Meteoritics, University of New Mexico, Albuquerque, NM 87131, USA.
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- A. M. Ollila
- Institute of Meteoritics, University of New Mexico, Albuquerque, NM 87131, USA.
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- G. M. Perrett
- Department of Physics, University of Guelph, Guelph, ON N1G 2W1, Canada.
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- M. S. Rice
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- M. E. Schmidt
- Department of Earth Sciences, Brock University, St. Catherines, ON L2S 3A1, Canada.
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- S. P. Schwenzer
- CEPSAR, Open University, Milton Keynes MK7 6AA, UK.
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- K. Stack
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- E. M. Stolper
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- D. Y. Sumner
- Department of Earth and Planetary Sciences, University of California, Davis, CA 95616, USA.
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- A. H. Treiman
- Lunar Planetary Science Institute, Houston, TX 77058, USA.
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- S. VanBommel
- Department of Physics, University of Guelph, Guelph, ON N1G 2W1, Canada.
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- D. T. Vaniman
- Planetary Science Institute, Tucson, AZ 85719, USA.
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- A. Vasavada
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
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- R. C. Wiens
- International Space and Response Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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- R. A. Yingst
- Planetary Science Institute, Tucson, AZ 85719, USA.
抄録
<jats:p>Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine–rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars.</jats:p>
収録刊行物
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- Science
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Science 343 (6169), 1244734-, 2014-01-24
American Association for the Advancement of Science (AAAS)