Impact and admittance modeling of the Isidis Planitia, Mars

摘要: Abstract In this study, the impact event that produced Martian Isidis basin (0–20°N and 70–100°E) was modeled using iSALE hydrocode, current lithospheric structure obtained comparing calculated admittance from topography gravity data, with top-load bottom-load flexure models. The best-fit model a thinned crust of 10 km, likely formed by cooling surficial melt pool after impact, an elastic thickness 36 km. We found crustal excavation thickening, temperatures >1500 K beneath area where free-air maxima is observed. geometry resulting modeling compatible radius basin. Derived thermal gradient heat flux are in agreement early-Noachian epoch for intense volcanic activity followed impact.