Tectonic framework of grooved terrain on ganymede |
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| Affiliation: | 1. Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, New Hampshire, USA;2. Solar System Exploration Research Virtual Institute, NASA Ames Research Center, Moffett Field, California, USA;3. NASA Goddard Space Flight Center, Greenbelt, Maryland, USA;1. Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China;2. CAS Center for Excellence in Comparative Planetology, China;3. University of Central Florida, Orlando, FL, USA;4. Beijing Institute of Space Mechanics and Electricity, Beijing, China;5. State Key Laboratory of Lunar and Planetary Science, Macau University of Science and Technology, Macau, China;6. China Academy of Space Technology, Beijing, China;7. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China;8. Xi''an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, Xi''an, China |
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| Abstract: | ![]()
An analysis of the tectonic features (grooves and prominent troughs) comprising grooved terrain on Ganymede shows a global tectonic framework. Domains of grooves, bordered by deep structural boundaries that controlled their extent and orientation, developed along preferred orientations. Some of these directions are much more prominent than others and appear to coincide with at least two great circles with pole locations at 152° long. 55° lat. and 65° long. and 50° lat. The great circle hypothesis is in good agreement with several statistical tests of the data set. Several mechanisms for the emplacement of grooved areas along great circles are discussed. A plausible mechanism is a pattern of equatorial-symmetric rising and descending convection cells. Because the studied areas represent only a small portion of Ganymede, interpretations of global tectonic patterns and models of formation must remain tentative. |
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