Post-Imbrian global lunar tectonism - Evidence for an initially totally molten moon

Mathematics – Logic

Scientific paper

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Lunar Crust, Lunar Evolution, Lunar Geology, Tectonics, Geological Faults, Models, Selenology, Stresses, Thermoelasticity

Scientific paper

An evaluation of lunar crust stress sources shows that, although only compressional thermoelastic stresses have been significant during the last 3.5 billion years of lunar history, the thermoelastic stresses calculated for lunar models with accretional heating profiles at the beginning of that history, indicated by a molten zone only a few hundred km deep and a cool deep interior, are less than 1 kbar in the crust. This implies that no significant global thrust faulting has occurred during the period in question. By contrast, compressional thermoelastic stresses generated in an initially-molten moon reach 3.5 kbar in the outer few km of the present crust. This is in the range of values invoked in thrust faulting in the outer 4 km of the crust, which have been detected by photoselenological investigations. An initially totally molten moon is implied by this stress model.

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