Provenance and Dissemination of Impact-melted Matter During Large Impacts

Details Provenance and Dissemination of Impact-melted Matter During Large Impacts Provenance and Dissemination of Impact-melted Matter During Large Impacts

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1381w&link_type=abstract

Lunar and Planetary Science, volume 27, page 1381

Computer Science

2

Basins: Impact, Impact Melt, Meteorites: Hed, Moon, Pristine Rocks: Lunar

Scientific paper

A model has been developed for inventorying the fate (in terms of melting +/- ejection +/- displacement from the transient crater) of materials during basin-forming impacts. Results indicate that in the largest lunar basins the material that melts plus avoids ejection from the transient crater is almost purely of mantle provenance; the overlying crust is preferentially swept away as ejecta. In very large- scale (high-melting/displacement) impacts, the molten component of the ejecta is of greater average depth provenance than the unmelted component. This effect probably explains why lunar impact melts tend to be less anorthositic than nearby unmelted fragmental breccias.

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