Microstructural Response of Zircon in High-Porosity Seeberger Sandstone Experimentally Shocked From 2.5 to 17.5 GPa
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This thesis studies the shock deformation of zircon in porous rocks. The significance of the findings are that during shock deformation porosity causes variations in shock pressure and temperature at a microstructural scale, forming shock metamorphic features at lower than expected pressures. This has implications for the study of shocked zircon in the field of impact cratering processes where zircon is hosted in porous sandstones.
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Detrital shocked zircon provides first radiometric age constraint (<1472 Ma) for the Santa Fe impact structure, New Mexico, USAMontalvo, P.; Cavosie, Aaron; Kirkland, C.; Evans, N.; McDonald, B.; Talavera, C.; Erickson, T.; Lugo-Centeno, C. (2019)The Santa Fe structure in northern New Mexico is one of the few confirmed impact craters in the western USA. The history of the impact structure is obscure as it is tectonized and eroded to the extent that an intact crater ...
Shock impedance amplified impact deformation of zircon in granitic rocks from the Chicxulub impact craterWittmann, A.; Cavosie, Aaron ; Timms, Nick ; Ferrière, L.; Rae, A.; Rasmussen, C.; Ross, C.; Stockli, D.; Schmieder, M.; Kring, D.A.; Zhao, J.; Xiao, L.; Morgan, J.V.; Gulick, S.P.S. (2021)Zircon is a precise chronometer and prominent recorder of impact deformation. However, many impact-induced features in zircon are poorly calibrated, sometimes due to contradicting experimental data, in other instances due ...
Preservation of detrital shocked minerals derived from the 1.85 Ga Sudbury impact structure in modern alluvium and Holocene glacial depositsThomson, O.; Cavosie, Aaron; Moser, D.; Barker, I.; Radovan, H.; French, B. (2014)Detrital shocked minerals can provide valua ble residual records of eroded impact structures. Recent studies have reported shocked minerals in modern alluvium in a subtropical climate from the deeply eroded 2.02 Ga Vredefort ...