Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8910965 | Geochimica et Cosmochimica Acta | 2018 | 39 Pages |
Abstract
Together with previous evidence from the â¼35â¯Myr old Popigai impact spherules and the â¼1â¯Myr old Ivory Coast microtektites, our finding suggests that at least three of the five known Cenozoic distal impact ejecta were generated by the impacts of large stony asteroids of chondritic composition, and possibly of ordinary chondritic composition. The impactor signature found in Australasian microtektites documents mixing of target and impactor melts upon impact cratering. This requires target-impactor mixing in both the two competing models in literature for the formation of the Australasian tektites/microtektites: the impact cratering and low-altitude airburst plume models.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
L. Folco, B.P. Glass, M. D'Orazio, P. Rochette,