Lunar mascons as consequences of giant impacts

Details Lunar mascons as consequences of giant impacts Lunar mascons as consequences of giant impacts

Aug 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974moon...10..307a&link_type=abstract

The Moon, vol. 10, July-Aug. 1974, p. 307-322.

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Lunar Evolution, Mascons, Meteorite Collisions, Thermal Conductivity, Gravity Anomalies, Lithosphere, Lunar Temperature, Porosity, Pressure Effects, Temperature Distribution, Time Dependence, Volcanology

Scientific paper

An investigation is conducted regarding the effect of a giant impact on the thermal evolution of the moon. A model is proposed for the formation of the lunar mascons. The model takes into account the evidence of late volcanism during a period from about 3.7 to about 3.2 b.y. ago. It is found that a giant impact produces extensive fracturing in the region surrounding the basin and reduces the average thermal conductivity of the upper 20 km of this region by a factor of about 2. The less conductive ejecta blanket and the fractured zone behave as a thermal insulator. The lithosphere beneath the basin thickens monotonically and it becomes strong enough to support the mascon.

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