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- E. M. Stolper
- Caltech, Pasadena, CA 91125, USA.
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- M. B. Baker
- Caltech, Pasadena, CA 91125, USA.
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- M. E. Newcombe
- Caltech, Pasadena, CA 91125, USA.
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- M. E. Schmidt
- Brock University, St. Catharines, Ontario L2T 3V8, Canada.
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- A. H. Treiman
- Lunar and Planetary Institute, Houston, TX 77058, USA.
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- A. Cousin
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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- M. D. Dyar
- Mount Holyoke College, South Hadley, MA 01075, USA.
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- M. R. Fisk
- Oregon State University, Corvallis, OR 97331, USA.
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- R. Gellert
- University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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- P. L. King
- Research School of Earth Sciences, Australian National University, Acton, ACT 0200, Australia.
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- L. Leshin
- Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
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- S. Maurice
- Institut de Recherches en Astrophysique et Planétologie, 31028 Toulouse, France.
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- S. M. McLennan
- The State University of New York, Stony Brook, NY 11794, USA.
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- M. E. Minitti
- Applied Physics Laboratory, The Johns Hopkins University, Baltimore, MD 20723, USA.
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- G. Perrett
- University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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- S. Rowland
- University of Hawaii, Honolulu, HI 96822, USA.
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- V. Sautter
- Laboratoire de Minéralogie et Cosmochimie du Muséum, 75005 Paris, France.
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- R. C. Wiens
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
抄録
<jats:p>“Jake_M,” the first rock analyzed by the Alpha Particle X-ray Spectrometer instrument on the Curiosity rover, differs substantially in chemical composition from other known martian igneous rocks: It is alkaline (>15% normative nepheline) and relatively fractionated. Jake_M is compositionally similar to terrestrial mugearites, a rock type typically found at ocean islands and continental rifts. By analogy with these comparable terrestrial rocks, Jake_M could have been produced by extensive fractional crystallization of a primary alkaline or transitional magma at elevated pressure, with or without elevated water contents. The discovery of Jake_M suggests that alkaline magmas may be more abundant on Mars than on Earth and that Curiosity could encounter even more fractionated alkaline rocks (for example, phonolites and trachytes).</jats:p>
収録刊行物
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- Science
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Science 341 (6153), 1239463-, 2013-09-27
American Association for the Advancement of Science (AAAS)