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Non-mare silicic volcanism on the lunar farside at Compton–Belkovich

Jolliff, Bradley L. and Wiseman, Sandra, A. and Lawrence, Samuel J. and Tran, Thanh N. and Robinson, Mark S. and Sato, Hiroyuki and Hawke, B. Ray and Scholten, Frank and Oberst, Jürgen and Hiesinger, Harald and Bogert, Carolyn H. van der and Greenhagen, Benjamin T. and Glotch, Tomothy D. and Paige, David A. (2011) Non-mare silicic volcanism on the lunar farside at Compton–Belkovich. Nature Geoscience, 4, pp. 566-571. DOI: 10.1038/ngeo1212.

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Official URL: http://www.nature.com/ngeo/journal/v4/n8/full/ngeo1212.html

Abstract

Non-basaltic volcanism is rare on the Moon. The best known examples occur on the lunar nearside in the compositionally evolved Procellarum KREEP terrane. However, there is an isolated thorium-rich area—the Compton–Belkovich thorium anomaly—on the lunar farside for which the origin is enigmatic. Here we use images from the Lunar Reconnaissance Orbiter Cameras, digital terrain models and spectral data from the Diviner lunar radiometer to assess the morphology and composition of this region. We identify a central feature, 25 by 35 km across, that is characterized by elevated topography and relatively high reflectance. The topography includes a series of domes that range from less than 1 km to more than 6 km across, some with steeply sloping sides. We interpret these as volcanic domes formed from viscous lava. We also observe arcuate to irregular circular depressions, which we suggest result from collapse associated with volcanism. We find that the volcanic feature is also enriched in silica or alkali-feldspar, indicative of compositionally evolved, rhyolitic volcanic materials. We suggest that the Compton–Belkovich thorium anomaly represents a rare occurrence of non-basaltic volcanism on the lunar farside. We conclude that compositionally evolved volcanism did occur far removed from the Procellarum KREEP terrane.

Document Type:Article
Title:Non-mare silicic volcanism on the lunar farside at Compton–Belkovich
Authors:
AuthorsInstitution or Email of Authors
Jolliff, Bradley L.Department of Earth and Planetary Sciences and the McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St Louis, Missouri 63130, USA
Wiseman, Sandra, A.Department of Geological Sciences, Brown University, Providence, Rhode Island 02912, USA
Lawrence, Samuel J.School of Earth and Space Exploration, Box 871404, Arizona State University, Tempe, Arizona 85287, USA
Tran, Thanh N.School of Earth and Space Exploration, Box 871404, Arizona State University, Tempe, Arizona 85287, USA
Robinson, Mark S.School of Earth and Space Exploration, Box 871404, Arizona State University, Tempe, Arizona 85287, USA
Sato, HiroyukiSchool of Earth and Space Exploration, Box 871404, Arizona State University, Tempe, Arizona 85287, USA
Hawke, B. RayHawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii 96822, USA
Scholten, Frankfrank.scholten@dlr.de
Oberst, Jürgenjuergen.oberst@dlr.de
Hiesinger, HaraldInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Muenster, Germany
Bogert, Carolyn H. van derInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Muenster, Germany
Greenhagen, Benjamin T.Jet Propulsion Laboratory, 4800 Oak Grove Drive, M/S 183-301, Pasadena, California 91109, USA
Glotch, Tomothy D.Department of Geosciences, Stony Brook University, Stony Brook, New York 11794, USA
Paige, David A.Department of Earth and Space Sciences, University of California, Los Angeles, California 90095, USA
Date:24 July 2011
Journal or Publication Title:Nature Geoscience
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:4
DOI:10.1038/ngeo1212
Page Range:pp. 566-571
Status:Published
Keywords:Non-basaltic volcanism, Moon, LRO LROC
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Exploration des Sonnensystems (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Dipl.-Ing. Frank Scholten
Deposited On:10 Jan 2012 10:21
Last Modified:04 Apr 2013 16:34

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