Compressional strain history of Mercury

Details Compressional strain history of Mercury Compressional strain history of Mercury

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1107p&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 107.

Mathematics

Logic

2

Mercury Surface, Planetary Evolution, Compression Loads, Strain Distribution, Planetary Gravitation, Astronomical Models, Lithosphere

Scientific paper

Lobate scarps on Mercury, interpreted as compressional in origin, formed over a period of Mercury's geological history and provide a strong constraint on the thermal evolution of the planet. Here we investigate Mercury thermal histories that might reproduce the amount of inferred strain over a specified interval of time. The total amount of compressional strain recorded by the lobate scarps is estimated to lie in a range of about 0.04 to 0.10 percent, which corresponds to a decrease in planetary radius of 1 to 2 km. Many scarps are disrupted by large impacts, indicating scarp formation may have occurred during and towards the end of heavy bombardment, coincident with intercrater plains formation. But scarps transect the younger smooth plains, suggesting that scarp formation continued past smooth plains emplacement, and this is consistent with the relatively uniform distribution of scarps on the surface.

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