Show simple item record

dc.contributor.authorTimms, Nicholas Eric
dc.contributor.authorErickson, T.
dc.contributor.authorZanetti, M.
dc.contributor.authorPearce, M.
dc.contributor.authorCayron, C.
dc.contributor.authorCavosie, Aaron
dc.contributor.authorReddy, S.
dc.contributor.authorWittmann, A.
dc.contributor.authorCarpenter, P.
dc.date.accessioned2017-09-27T10:21:59Z
dc.date.available2017-09-27T10:21:59Z
dc.date.created2017-09-27T09:48:07Z
dc.date.issued2017
dc.identifier.citationTimms, N.E. and Erickson, T. and Zanetti, M. and Pearce, M. and Cayron, C. and Cavosie, A. and Reddy, S. et al. 2017. Cubic zirconia in >2370 °C impact melt records Earth's hottest crust. Earth and Planetary Science Letters. 477: pp. 52-58.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/57023
dc.identifier.doi10.1016/j.epsl.2017.08.012
dc.description.abstract

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.

dc.publisherElsevier BV
dc.titleCubic zirconia in >2370 °C impact melt records Earth's hottest crust
dc.typeJournal Article
dcterms.source.volume477
dcterms.source.startPage52
dcterms.source.endPage58
dcterms.source.issn0012-821X
dcterms.source.titleEarth and Planetary Science Letters
curtin.departmentDepartment of Applied Geology
curtin.accessStatusOpen access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record