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Internal Structure and Early Thermal Evolution of Mars from Mars Global Surveyor Topography and Gravity

Zuber, Maria T. and Solomon, Sean C. and Phillips, Roger J. and Smith, David E. and Tyler, G. Leonard and Aharonson, Oded and Balmino, Georges and Banderdt, W. Bruce and Head, James W. and Johnson, Catherine L. and Lemoine, Frank G. and McGovern, Patrick J. and Neumann, Gregory A. and Rowlands, David D. and Zhong, Shijie (2000) Internal Structure and Early Thermal Evolution of Mars from Mars Global Surveyor Topography and Gravity. Science, 287 (5459). pp. 1788-1793. ISSN 0036-8075. doi:10.1126/science.287.5459.1788.

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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.

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URLURL TypeDescription DOIArticle
Aharonson, Oded0000-0001-9930-2495
Head, James W.0000-0003-2013-560X
Additional Information:© 2000 American Association for the Advancement of Science. 20 January 2000; accepted 18 February 2000. We thank the MGS spacecraft and mission operations teams at the Jet Propulsion Laboratory and Lockheed-Martin Astronautics for their contributions to this effort. We also acknowledge R. Follas, J. Abshire, and the MOLA Instrument Team for laser performance information; M. Torrence and J. Schott for assistance in altimetry processing; R. Simpson, P. Priest, S. Asmar, and J. Twicken for assistance in tracking data acquisition and processing; S. Fricke for help with orbit determination; M. Wieczorek for compilation of martian meteorite densities; M. Simons and F. Simons (no relation) for codes used in the lithosphere thickness inversions; and D. Stevenson and N. Sleep for helpful reviews. The MGS Radio Science and MOLA investigations are supported by the NASA Mars Exploration Program.
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Issue or Number:5459
Record Number:CaltechAUTHORS:20130419-102810974
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38034
Deposited On:23 Apr 2013 15:51
Last Modified:09 Nov 2021 23:33

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