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Images of surface volatiles in Mercury’s polar craters acquired by the MESSENGER spacecraft

2014; Geological Society of America; Volume: 42; Issue: 12 Linguagem: Inglês

10.1130/g35916.1

1943-2682

N. L. Chabot, C. M. Ernst, B. W. Denevi, Hari Nair, A. N. Deutsch, D. T. Blewett, S. L. Murchie, G. A. Neumann, E. Mazarico, D. A. Paige, J. K. Harmon, J. W. Head, Sean C. Solomon,

Isotope Analysis in Ecology

Research Article| December 01, 2014 Images of surface volatiles in Mercury's polar craters acquired by the MESSENGER spacecraft Nancy L. Chabot; Nancy L. Chabot * 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA *E-mail: Nancy.Chabot@jhuapl.edu. Search for other works by this author on: GSW Google Scholar Carolyn M. Ernst; Carolyn M. Ernst 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Brett W. Denevi; Brett W. Denevi 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Hari Nair; Hari Nair 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Ariel N. Deutsch; Ariel N. Deutsch 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar David T. Blewett; David T. Blewett 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Scott L. Murchie; Scott L. Murchie 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Gregory A. Neumann; Gregory A. Neumann 2Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland 20771, USA Search for other works by this author on: GSW Google Scholar Erwan Mazarico; Erwan Mazarico 2Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland 20771, USA Search for other works by this author on: GSW Google Scholar David A. Paige; David A. Paige 3Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar John K. Harmon; John K. Harmon 4National Astronomy and Ionosphere Center, Arecibo Observatory, Arecibo, Puerto Rico 00612, USA Search for other works by this author on: GSW Google Scholar James W. Head; James W. Head 5Department of Geological Sciences, Brown University, Providence, Rhode Island 02912, USA Search for other works by this author on: GSW Google Scholar Sean C. Solomon Sean C. Solomon 6Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA7Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D.C. 20015, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Nancy L. Chabot * 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Carolyn M. Ernst 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Brett W. Denevi 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Hari Nair 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Ariel N. Deutsch 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA David T. Blewett 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Scott L. Murchie 1The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA Gregory A. Neumann 2Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland 20771, USA Erwan Mazarico 2Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland 20771, USA David A. Paige 3Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095, USA John K. Harmon 4National Astronomy and Ionosphere Center, Arecibo Observatory, Arecibo, Puerto Rico 00612, USA James W. Head 5Department of Geological Sciences, Brown University, Providence, Rhode Island 02912, USA Sean C. Solomon 6Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA7Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D.C. 20015, USA *E-mail: Nancy.Chabot@jhuapl.edu. Publisher: Geological Society of America Received: 23 May 2014 Revision Received: 29 Aug 2014 Accepted: 31 Aug 2014 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2014 Geological Society of America Geology (2014) 42 (12): 1051–1054. https://doi.org/10.1130/G35916.1 Article history Received: 23 May 2014 Revision Received: 29 Aug 2014 Accepted: 31 Aug 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Nancy L. Chabot, Carolyn M. Ernst, Brett W. Denevi, Hari Nair, Ariel N. Deutsch, David T. Blewett, Scott L. Murchie, Gregory A. Neumann, Erwan Mazarico, David A. Paige, John K. Harmon, James W. Head, Sean C. Solomon; Images of surface volatiles in Mercury's polar craters acquired by the MESSENGER spacecraft. Geology 2014;; 42 (12): 1051–1054. doi: https://doi.org/10.1130/G35916.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Images acquired by NASA's MESSENGER spacecraft have revealed the morphology of frozen volatiles in Mercury's permanently shadowed polar craters and provide insight into the mode of emplacement and evolution of the polar deposits. The images show extensive, spatially continuous regions with distinctive reflectance properties. A site within Prokofiev crater identified as containing widespread surface water ice exhibits a cratered texture that resembles the neighboring sunlit surface except for its uniformly higher reflectance, indicating that the surficial ice was emplaced after formation of the underlying craters. In areas where water ice is inferred to be present but covered by a thin layer of dark, organic-rich volatile material, regions with uniformly lower reflectance extend to the edges of the shadowed areas and terminate with sharp boundaries. The sharp boundaries indicate that the volatile deposits at Mercury's poles are geologically young, relative to the time scale for lateral mixing by impacts, and either are restored at the surface through an ongoing process or were delivered to the planet recently. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.