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

Citation
Mt. Zuber et al., Internal structure and early thermal evolution of Mars from Mars Global Surveyor topography and gravity, SCIENCE, 287(5459), 2000, pp. 1788-1793
Citations number
55
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary,Multidisciplinary,Multidisciplinary
Journal title
SCIENCE
ISSN journal
0036-8075 → ACNP
Volume
287
Issue
5459
Year of publication
2000
Pages
1788 - 1793
Database
ISI
SICI code
0036-8075(20000310)287:5459<1788:ISAETE>2.0.ZU;2-T
Abstract
Topography and gravity measured by the Mars Global Surveyor have enabled de termination of the global crust and upper mantle structure of Mars. The pla net displays two distinct crustal zones that do not correlate globally with the geologic dichotomy: a region of crust that thins progressively from so uth to north and encompasses much of the southern highlands and Tharsis pro vince and a region of approximately uniform crustal thickness that includes the northern lowlands and Arabia Terra. The strength of the lithosphere be neath the ancient southern highlands suggests that the northern hemisphere was a locus of high heat flow early in martian history. The thickness of th e 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.