Survival of impact-induced thermal anomalies in the Martian mantle

Details Survival of impact-induced thermal anomalies in the Martian mantle Survival of impact-induced thermal anomalies in the Martian mantle

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgre..107.5082r&link_type=abstract

Journal of Geophysical Research (Planets), Volume 107, Issue E10, pp. 12-1, CiteID 5082, DOI 10.1029/2000JE001474

Physics

10

Planetology: Solar System Objects: Mars, Planetary Sciences: Interiors (8147), Planetary Sciences: Origin And Evolution, Planetary Sciences: Gravitational Fields (1227)

Scientific paper

A number of geophysical arguments point out the possibility that global mantle convection could have been extremely sluggish or even absent during a large part of Martian history. This implies that early mantle thermal anomalies produced during planetary formation might not have been quickly erased by vigorous convection. One likely mechanism of early thermal inhomogeneity is large impacts at the end of heavy bombardment. We suggest that Tharsis province might be related to such an impact-induced thermal anomaly rather than a convective plume. The shape of the present-day geoid for our preferred model is in good agreement with the geoid measured by Mars Global Surveyor (MGS).

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