Internal structure and early thermal evolution of Mars from Mars Global Surveyor topography and gravity.

Topography and gravity measured by the Mars Global Surveyor have enabled determination of the global crust and upper mantle structure of Mars. The planet displays two distinct crustal zones that do not correlate globally with the geologic dichotomy: a region of crust that thins progressively from south to north and encompasses much of the southern highlands and Tharsis province and a region of approximately uniform crustal thickness that includes the northern lowlands and Arabia Terra. The strength of the lithosphere beneath the ancient southern highlands suggests that the northern hemisphere was a locus of high heat flow early in martian history. The thickness of the elastic lithosphere increases with time of loading in the northern plains and Tharsis. The northern lowlands contain structures interpreted as large buried channels that are consistent with northward transport of water and sediment to the lowlands before the end of northern hemisphere resurfacing.

[1]  Robert Blair Vocci.  Geology , 1882, Nature.

[2]  David E. Smith,et al.  The global topography of Mars and implications for surface evolution. , 1999, Science.

[3]  W. F. Brace,et al.  Limits on lithospheric stress imposed by laboratory experiments , 1980 .

[4]  Ness,et al.  Magnetic lineations in the ancient crust of mars , 1999, Science.

[5]  G. Mcgill.  Buried topography of Utopia, Mars: Persistence of a giant impact depression , 1989 .

[6]  R. J. Willemann,et al.  Role of membrane stresses in the support of planetary topography , 1981 .

[7]  H. McSween.  SNC meteorites: Clues to Martian petrologic evolution? , 1985 .

[8]  Tilman Spohn,et al.  The interior structure of Mars: Implications from SNC meteorites , 1997 .

[9]  J. Morgan,et al.  Chicxulub: The third dimension of a multi-ring impact basin , 1999 .

[10]  David E. Smith,et al.  The Mars Observer laser altimeter investigation , 1992 .

[11]  R. Nerem,et al.  An inversion of gravity and topography for mantle and crustal structure on Mars , 1996 .

[12]  Michael H. Carr.  The Surface of Mars , 1981 .

[13]  J W Head,et al.  Possible ancient oceans on Mars: evidence from Mars Orbiter Laser Altimeter data. , 1999, Science.

[14]  R. Nerem,et al.  The isostatic state of Martian topography revisited , 1996 .

[15]  R. Phillips,et al.  Mars: crustal structure inferred from Bouguer gravity anomalies. , 1973 .

[16]  Sean C. Solomon,et al.  Heterogeneities in the thickness of the elastic lithosphere of Mars - Constraints on heat flow and internal dynamics , 1990 .

[17]  Sean C. Solomon,et al.  Localization of gravity and topography: constraints on the tectonics and mantle dynamics of Venus , 1997 .

[18]  J. Head,et al.  The deep structure of lunar basins: Implications for basin formation and modification , 1985 .

[19]  David C. Pieri,et al.  Coastal Geomorphology of the Martian northern plains , 1993 .

[20]  D. Forsyth.  Crustal thickness and the average depth and degree of melting in fractional melting models of passive flow beneath mid‐ocean ridges , 1993 .

[21]  The MOLA Topographic signature at the crustal dichotomy boundary zone on Mars , 1998 .

[22]  N. Sleep.  Martian plate tectonics , 1994 .

[23]  W. M. Kaula.  Theory of satellite geodesy , 1966 .

[24]  David E. Smith,et al.  Radio science investigations with Mars Observer , 1992 .

[25]  Donald W. Forsyth,et al.  Subsurface loading and estimates of the flexural rigidity of continental lithosphere , 1985 .

[26]  Y. Caristan.  The transition from high temperature creep to fracture in Maryland diabase , 1982 .

[27]  Steven W. Squyres,et al.  The martian hemispheric dichotomy may be due to a giant impact , 1984, Nature.

[28]  M. McNutt.  Lithospheric flexure and thermal anomalies , 1984 .

[29]  Ness,et al.  Global distribution of crustal magnetization discovered by the mars global surveyor MAG/ER experiment , 1999, Science.

[30]  David E. Smith,et al.  The Shape and Internal Structure of the Moon from the Clementine Mission , 1994, Science.

[31]  Roger J. Phillips,et al.  Potential anomalies on a sphere: Applications to the thickness of the lunar crust , 1998 .

[32]  Remo Guidieri.  Res , 1995, RES: Anthropology and Aesthetics.

[33]  Bruce G. Bills,et al.  Mars topography harmonics and geophysical implications , 1978 .

[34]  Tilman Spohn,et al.  Thermal history of Mars and the sulfur content of its core , 1990 .

[35]  Olivier Grasset,et al.  Thermal convection in a volumetrically heated, infinite Prandtl number fluid with strongly temperature‐dependent viscosity: Implications for planetary thermal evolution , 1998 .

[36]  G. Balmino,et al.  The gravity field of Mars: results from Mars Global Surveyor. , 1999, Science.

[37]  J W Head,et al.  Topography of the northern hemisphere of Mars from the Mars Orbiter Laser Altimeter. , 1998, Science.

[38]  C. Goetze.  The mechanisms of creep in olivine , 1978, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[39]  A. Albee,et al.  Mars global surveyor mission: overview and status. , 1998, Science.

[40]  Richard A. Schultz,et al.  Large impact basins and the mega-impact origin for the crustal dichotomy on Mars , 1988 .

[41]  David E. Smith,et al.  The Shape of Mars and the Topographic Signature of the Hemispheric Dichotomy , 1996, Science.