Excavation of the lunar mantle by basin-forming events on the Moon
MetadataShow full item record
© 2014 Elsevier B.V. Global maps of crustal thickness on the Moon, derived from gravity measurements obtained by NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission, have shown that the lunar crust is thinner than previously thought. Hyperspectral data obtained by the Kaguya mission have also documented areas rich in olivine that have been interpreted as material excavated from the mantle by some of the largest lunar impact events. Numerical simulations were performed with the iSALE-2D hydrocode to investigate the conditions under which mantle material may have been excavated during large impact events and where such material should be found. The results show that excavation of the mantle could have occurred during formation of the several largest impact basins on the nearside hemisphere as well as the Moscoviense basin on the farside hemisphere. Even though large areas in the central portions of these basins were later covered by mare basaltic lava flows, surficial lunar mantle deposits are predicted in areas external to these maria. Our results support the interpretation that the high olivine abundances detected by Kaguya spacecraft could indeed be derived from the lunar mantle.
Showing items related by title, author, creator and subject.
The compositions of the lunar crust and upper mantle: Spectral analysis of the inner rings of lunar impact basinsLemelin, M.; Lucey, P.; Miljkovic, Katarina; Gaddis, L.; Hare, T.; Ohtake, M. (2018)The innermost ring in impact basins exposes material originating from various depths, and can be used to study the composition of the lunar crust with depth. In this study, we conduct quantitative mineralogical analyses ...
Bellucci, J.; Nemchin, Alexander; Grange, M.; Robinson, K.; Collins, G.; Whitehouse, M.; Snape, J.; Norman, M.; Kring, D. (2019)© 2019 Elsevier B.V. A felsite clast in lunar breccia Apollo sample 14321, which has been interpreted as Imbrium ejecta, has petrographic and chemical features that are consistent with formation conditions commonly assigned ...
Miljkovic, Katarina; Lemelin, M.; Lucey, P. (2017)Numerical modeling of the peak-ring basin formation showed that the peak-ring forms from the material that is part of the central uplift outwardly thrust over the inwardly collapsing transient crater rim. Simulations of ...