Silicic volcanism on Mars evidenced by tridymite in high-SiO <sub>2</sub> sedimentary rock at Gale crater
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- Richard V. Morris
- NASA Johnson Space Center, Houston, TX 77058;
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- David T. Vaniman
- Planetary Science Institute, Tucson, AZ 85719;
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- David F. Blake
- NASA Ames Research Center, Moffitt Field, CA 94035;
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- Ralf Gellert
- Department of Physics, University of Guelph, Guelph, ON, Canada N1G 2W1;
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- Steve J. Chipera
- Chesapeake Energy, Oklahoma City, OK 73118;
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- Elizabeth B. Rampe
- Aerodyne Industries, Houston, TX 77058;
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- Douglas W. Ming
- NASA Johnson Space Center, Houston, TX 77058;
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- Shaunna M. Morrison
- Department of Geosciences, University of Arizona, Tucson, AZ 85721;
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- Robert T. Downs
- Department of Geosciences, University of Arizona, Tucson, AZ 85721;
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- Allan H. Treiman
- Lunar and Planetary Institute, Houston, TX 77058;
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- Albert S. Yen
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109;
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- John P. Grotzinger
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125;
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- Cherie N. Achilles
- Department of Geosciences, University of Arizona, Tucson, AZ 85721;
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- Thomas F. Bristow
- NASA Ames Research Center, Moffitt Field, CA 94035;
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- Joy A. Crisp
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109;
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- David J. Des Marais
- NASA Ames Research Center, Moffitt Field, CA 94035;
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- Jack D. Farmer
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287;
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- Kim V. Fendrich
- Department of Geosciences, University of Arizona, Tucson, AZ 85721;
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- Jens Frydenvang
- Los Alamos National Laboratory, Los Alamos, NM 87545;
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- Trevor G. Graff
- Jacobs, Houston, TX 77058;
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- John-Michael Morookian
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109;
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- Edward M. Stolper
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125;
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- Susanne P. Schwenzer
- Lunar and Planetary Institute, Houston, TX 77058;
書誌事項
- 公開日
- 2016-06-13
- 権利情報
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- http://www.pnas.org/preview_site/misc/userlicense.xhtml
- DOI
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- 10.1073/pnas.1607098113
- 公開者
- Proceedings of the National Academy of Sciences
この論文をさがす
説明
<jats:title>Significance</jats:title> <jats:p> Tridymite, a SiO <jats:sub>2</jats:sub> mineral that crystallizes at low pressures and high temperatures (>870 °C) from high-SiO <jats:sub>2</jats:sub> materials, was detected at high concentrations in a sedimentary mudstone in Gale crater, Mars. Mineralogy and abundance were determined by X-ray diffraction using the Chemistry and Mineralogy instrument on the Mars Science Laboratory rover <jats:italic>Curiosity</jats:italic> . Terrestrial tridymite is commonly associated with silicic volcanism where high temperatures and high-silica magmas prevail, so this occurrence is the first in situ mineralogical evidence for martian silicic volcanism. Multistep processes, including high-temperature alteration of silica-rich residues of acid sulfate leaching, are alternate formation pathways for martian tridymite but are less likely. The unexpected discovery of tridymite is further evidence of the complexity of igneous petrogenesis on Mars, with igneous evolution to high-SiO <jats:sub>2</jats:sub> compositions. </jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 113 (26), 7071-7076, 2016-06-13
Proceedings of the National Academy of Sciences