Cubic zirconia in >2370 °C impact melt records Earth's hottest crust
Bolide impacts influence primordial evolution of planetary bodies because they can cause instantaneous melting and vaporization of both crust and impactors. Temperatures reached by impact-generated silicate melts are unknown because meteorite impacts are ephemeral, and established mineral and rock t...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/57023 |
| _version_ | 1848759996446146560 |
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| author | Timms, Nicholas Eric Erickson, T. Zanetti, M. Pearce, M. Cayron, C. Cavosie, Aaron Reddy, S. Wittmann, A. Carpenter, P. |
| author_facet | Timms, Nicholas Eric Erickson, T. Zanetti, M. Pearce, M. Cayron, C. Cavosie, Aaron Reddy, S. Wittmann, A. Carpenter, P. |
| author_sort | Timms, Nicholas Eric |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Bolide impacts influence primordial evolution of planetary bodies because they can cause instantaneous melting and vaporization of both crust and impactors. Temperatures reached by impact-generated silicate melts are unknown because meteorite impacts are ephemeral, and established mineral and rock thermometers have limited temperature ranges. Consequently, impact melt temperatures in global bombardment models of the early Earth and Moon are poorly constrained, and may not accurately predict the survival, stabilization, geochemical evolution and cooling of early crustal materials. Here we show geological evidence for the transformation of zircon to cubic zirconia plus silica in impact melt from the 28 km diameter Mistastin Lake crater, Canada, which requires super-heating in excess of 2370 °C. This new temperature determination is the highest recorded from any crustal rock. Our phase heritage approach extends the thermometry range for impact melts by several hundred degrees, more closely bridging the gap between nature and theory. Profusion of >2370 °C superheated impact melt during high intensity bombardment of Hadean Earth likely facilitated consumption of early-formed crustal rocks and minerals, widespread volatilization of various species, including hydrates, and formation of dry, rigid, refractory crust. |
| first_indexed | 2025-11-14T10:08:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-57023 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:08:45Z |
| publishDate | 2017 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-570232019-09-02T00:42:49Z Cubic zirconia in >2370 °C impact melt records Earth's hottest crust Timms, Nicholas Eric Erickson, T. Zanetti, M. Pearce, M. Cayron, C. Cavosie, Aaron Reddy, S. Wittmann, A. Carpenter, P. Bolide impacts influence primordial evolution of planetary bodies because they can cause instantaneous melting and vaporization of both crust and impactors. Temperatures reached by impact-generated silicate melts are unknown because meteorite impacts are ephemeral, and established mineral and rock thermometers have limited temperature ranges. Consequently, impact melt temperatures in global bombardment models of the early Earth and Moon are poorly constrained, and may not accurately predict the survival, stabilization, geochemical evolution and cooling of early crustal materials. Here we show geological evidence for the transformation of zircon to cubic zirconia plus silica in impact melt from the 28 km diameter Mistastin Lake crater, Canada, which requires super-heating in excess of 2370 °C. This new temperature determination is the highest recorded from any crustal rock. Our phase heritage approach extends the thermometry range for impact melts by several hundred degrees, more closely bridging the gap between nature and theory. Profusion of >2370 °C superheated impact melt during high intensity bombardment of Hadean Earth likely facilitated consumption of early-formed crustal rocks and minerals, widespread volatilization of various species, including hydrates, and formation of dry, rigid, refractory crust. 2017 Journal Article http://hdl.handle.net/20.500.11937/57023 10.1016/j.epsl.2017.08.012 Elsevier BV fulltext |
| spellingShingle | Timms, Nicholas Eric Erickson, T. Zanetti, M. Pearce, M. Cayron, C. Cavosie, Aaron Reddy, S. Wittmann, A. Carpenter, P. Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title | Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title_full | Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title_fullStr | Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title_full_unstemmed | Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title_short | Cubic zirconia in >2370 °C impact melt records Earth's hottest crust |
| title_sort | cubic zirconia in >2370 °c impact melt records earth's hottest crust |
| url | http://hdl.handle.net/20.500.11937/57023 |