A post-Galileo view of Io's interior

Abstract We present a self-consistent model for the interior of Io, taking the recent Galileo data into account. In this model, Io has a completely molten core, substantially molten mantle, and a very cold lithosphere. Heat from magmatic activity can mobilize volatile compounds such as SO 2 in the lithosphere, and the movement of such cryogenic fluids may be important in the formation of surface features including sapping scarps and paterae.

[1]  J. Anderson,et al.  Io's gravity field and interior structure , 2001 .

[2]  A. McEwen,et al.  Mountains on Io: High‐resolution Galileo observations, initial interpretations, and formation models , 2001 .

[3]  Alfred S. McEwen,et al.  Orogenic tectonism on Io , 2001 .

[4]  A. McEwen,et al.  The mountains of Io: Global and geological perspectives from Voyager and Galileo , 2001 .

[5]  G. Davies,et al.  Magma transport of heat on Io: A mechanism allowing a thick lithosphere , 1981 .

[6]  Mark S. Ghiorso,et al.  Chemical mass transfer in magmatic processes IV. A revised and internally consistent thermodynamic model for the interpolation and extrapolation of liquid-solid equilibria in magmatic systems at elevated temperatures and pressures , 1995 .

[7]  A. McEwen,et al.  Volcanic hot spots on Io: Correlation with low‐albedo calderas , 1985 .

[8]  Rosaly M. C. Lopes,et al.  Polar Passes by Io: Limits on the Internal Field and Sources of Field-Aligned Currents in the Polar cap , 2002 .

[9]  S. Collins,et al.  Discovery of Currently Active Extraterrestrial Volcanism , 1979, Science.

[10]  M. Carr,et al.  Stability of sulfur slopes on Io , 1980 .

[11]  J. Goguen,et al.  Io's heat flow from infrared radiometry: 1983–1993 , 1994 .

[12]  C. Sagan.  Sulphur flows on Io , 1979, Nature.

[13]  T. Spohn,et al.  Thermal-orbital histories of viscoelastic models of Io (J1) , 1990 .

[14]  M. Ross,et al.  Tidally forced viscous heating in a partially molten Io , 1984 .

[15]  W. Wamsteker,et al.  On the surface composition of Io , 1974 .

[16]  David Morrison,et al.  Satellites of Jupiter , 1982 .

[17]  D. Stevenson,et al.  Mechanics of Fluid-Rock Systems , 1991 .

[18]  Alfred S. McEwen,et al.  The lithosphere and surface of Io , 2004 .

[19]  N. Schneider,et al.  IO ON THE EVE OF THE GALILEO MISSION , 1996 .

[20]  W. Smythe,et al.  Silicate Cooling Model Fits to Galileo NIMS Data of Volcanism on Io , 2000 .

[21]  M. Ross,et al.  Internal structure of Io and the global distribution of its topography , 1990 .

[22]  R. Brett.  A lunar core of Fe-Ni-S. , 1973 .

[23]  A. McEwen,et al.  Two classes of volcanic plumes on Io , 1983 .

[24]  D. Stevenson,et al.  Episodic volcanism of tidally heated satellites with application to Io , 1986 .

[25]  A. McEwen,et al.  High‐temperature hot spots on Io as Seen by the Galileo solid state imaging (SSI) Experiment , 1997 .

[26]  G. Leone,et al.  Density structure of Io and the migration of magma through its lithosphere , 2001 .

[27]  T V Johnson,et al.  High-temperature silicate volcanism on Jupiter's moon Io. , 1998, Science.

[28]  C. Sagan,et al.  Volcanic resurfacing rates and implications for volatiles on Io , 1979, Nature.

[29]  Rosaly M. C. Lopes,et al.  Mapping of the Culann–Tohil region of Io from Galileo imaging data , 2004 .

[30]  A. McEwen,et al.  Morphology and time variability of Io's visible aurora , 2001 .

[31]  Alfred S. McEwen,et al.  Global Color Variations on Io , 1997 .

[32]  Alfred S. McEwen,et al.  Active Volcanism on Io: Global Distribution and Variations in Activity , 1999 .

[33]  A. McEwen,et al.  Galileo at Io: results from high-resolution imaging. , 2000, Science.

[34]  A. McEwen,et al.  Observations and initial modeling of lava‐SO2 interactions at Prometheus, Io , 2001 .

[35]  R. H. Brown,et al.  Io: Evidence for Silicate Volcanism in 1986 , 1988, Science.

[36]  A. McEwen,et al.  Mountains and Calderas on Io: Possible Implications for Lithosphere Structure and Magma Generation , 1998 .

[37]  D. Morrison.  Radiometry of satellites and of the rings of Saturn , 1977 .

[38]  A. McEwen,et al.  The final Galileo SSI observations of Io: orbits G28-I33 , 2004 .

[39]  Alfred S. McEwen,et al.  Thermal signature, eruption style, and eruption evolution at Pele and Pillan on Io , 2001 .

[40]  D. L. Anderson.  Theory of Earth , 2014 .

[41]  J. T. Ratcliff,et al.  Three-Dimensional Simulations of Mantle Convection in Io , 2001 .

[42]  D. Blaney,et al.  Volcanic Eruptions on Io: Heat Flow, Resurfacing, and Lava Composition , 1995 .

[43]  L. Soderblom,et al.  Erosional scarps on Io , 1979, Nature.

[44]  A. Dombard,et al.  Chaos on Io: A model for formation of mountain blocks by crustal heating, melting, and tilting , 2001 .

[45]  S. Sandford,et al.  New Narrow Infrared Absorption Features in the Spectrum of Io between 3600 and 3100 cm-1 (2.8-3.2 μm) , 1994 .

[46]  S. Kieffer,et al.  A close-up look at Io from Galileo's near-infrared mapping spectrometer. , 2000, Science.

[47]  V. Sinton.  Io: A volcanic flow model for the hot spot emission spectrum and a thermostatic mechanism , 1982 .

[48]  M. Bulmer,et al.  Origin of mountains on Io by thrust faulting and large-scale mass movements , 1998, Science.

[49]  Todd J. Jones,et al.  Active Volcanism on Io as Seen by Galileo SSI , 1998 .

[50]  A. McEwen,et al.  Imaging of volcanic activity on Jupiter's moon Io by Galileo during the Galileo Europa Mission and the Galileo Millennium Mission , 2001 .

[51]  Tilman Spohn,et al.  Thermal histories, compositions and internal structures of the moons of the solar system , 1986 .

[52]  L. Travis,et al.  Mapping of Io's thermal radiation by the Galileo photopolarimeter-radiometer (PPR) instrument , 2004 .

[53]  Jeffrey S. Kargel,et al.  Lava lakes on Io: observations of Io's volcanic activity from Galileo NIMS during the 2001 fly-bys , 2004 .

[54]  S. Sandford,et al.  The 2.5-5.0 micron spectra of Io: Evidence for H2S and H2O frozen in SO2 , 1990 .

[55]  G. Ballester,et al.  Discovery of gaseous S2 in Io's Pele plume. , 2000, Science.

[56]  M. Monnereau,et al.  Is Io's Mantle Really Molten? , 2001 .

[57]  A. Philpotts,et al.  Role of plagioclase crystal chains in the differentiation of partly crystallized basaltic magma , 1998, Nature.

[58]  A. McEwen,et al.  Io's thermal emission from the Galileo photopolarimeter-radiometer. , 2000, Science.

[59]  B. Schmitt,et al.  Possible identification of local deposits of Cl2SO2 on Io from NIMS/Galileo spectra , 2003 .

[60]  H. Masursky,et al.  Volcanic features of Io , 1979, Nature.

[61]  P. Gierasch,et al.  Infrared Observations of the Jovian System from Voyager 1 , 1979, Science.

[62]  A. McEwen,et al.  Paterae on Io: A new type of volcanic caldera? , 2001 .

[63]  A. McEwen,et al.  Revisiting the Hypothesis of a Mushy Global Magma Ocean in Io , 1999 .

[64]  Bradford A. Smith,et al.  The Jupiter System Through the Eyes of Voyager 1 , 1979, Science.

[65]  C. Phillips.  Voyager and Galileo SSI views of volcanic resurfacing on Io and the search for geologic activity on Europa , 2000 .

[66]  S. Kieffer,et al.  The role of SO2 in volcanism on Io , 1979, Nature.

[67]  S. Kieffer,et al.  Prometheus: Io's wandering plume. , 2000, Science.

[68]  P. Cassen,et al.  Melting of Io by Tidal Dissipation , 1979, Science.

[69]  D. B. Nash,et al.  VOLCANIC RESURFACING OF IO : POST-REPAIR HST IMAGING , 1997 .

[70]  D. Crown,et al.  Geology of Io , 1987 .

[71]  M. Ross,et al.  Tidal dissipation, surface heat flow, and figure of viscoelastic models of Io , 1988 .

[72]  A. McEwen,et al.  Surface changes on Io during the Galileo mission , 2003 .

[73]  M. Carr.  Silicate volcanism on Io , 1986 .

[74]  F. Nimmo.  Why does Venus lack a magnetic field , 2002 .

[75]  D. Stevenson,et al.  Subsidence of topography on Io , 1987 .

[76]  M. Mellon,et al.  Mass Wasting and Ground Collapse in Terrains of Volatile-Rich Deposits as a Solar System-Wide Geological Process: The Pre-Galileo View , 1996 .

[77]  O. Kuskov,et al.  Core Sizes and Internal Structure of Earth's and Jupiter's Satellites , 2001 .

[78]  R. Greeley,et al.  A komatiite analog to potential ultramafic materials on Io , 2000 .

[79]  A. McEwen,et al.  Magmatic Differentiation of Io , 1997 .

[80]  D. McKenzie.  The extraction of magma from the crust and mantle , 1985 .

[81]  W. Moore.  The Thermal State of Io , 2001 .

[82]  A. McEwen,et al.  Landform Degradation and Slope Processes on Io: The Galileo View , 2001 .

[83]  Rosaly M. C. Lopes,et al.  Geologic Mapping of the Chaac-Camaxtli Region of Io from Galileo Imaging Data , 2002 .