Show simple item record

dc.contributor.authorMoser, D.
dc.contributor.authorDavis, W.
dc.contributor.authorReddy, Steven
dc.contributor.authorFlemming, R.
dc.contributor.authorHart, R.
dc.date.accessioned2017-01-30T10:43:19Z
dc.date.available2017-01-30T10:43:19Z
dc.date.created2009-01-06T18:01:33Z
dc.date.issued2009
dc.identifier.citationMoser, Desmond and Davis, William and Reddy, Steven and Flemming, Roberta and Hart, R. 2009. Zircon U-Pb strain chronometry reveals deep impact-triggered flow. Earth and Planetary Science Letters 277 (1-2): pp. 73-79.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/5030
dc.identifier.doi10.1016/j.epsl.2008.09.036
dc.description.abstract

Large (>100km) meteorite impact cratering events play important roles in surface and biosphere evolution, however, their potential for widespread ductile modification of the lithosphere has been difficult to assess, due partly to our inability to isotopically age-correlate deep mineral fabrics with surface records. We have integrated benchmark U-Pb zircon dating methods (ID-TIMS, SHRIMP) with new microstructural techniques (EBSD, XRD) to demonstrate that crystal-plastic deformation can cause rapid out-diffusion of radiogenic Pb and accompanying trace element alteration in crystalline zircon. We have used this phenomenon to directly date fabric in Archean zircons and xenoliths of the lower crust of South Africa at 2023 15 million years, coeval with the 2020 3 million year old Vredefort cratering event at surface, with extent > or =20,000 km2. Our findings indicate that regional exogenic fabrics, similar to high-temperature tectonic fabrics, exist in ancient crust. Moreover, our results establish that crystal-plastic deformation in the lithosphere can now be directly dated and linked to planetary evolution by zircon U-Pb strain chronometry.

dc.publisherElsevier
dc.subjectgeochronology
dc.subjectU-Pb dating
dc.subjectEBSD
dc.subjectzircon
dc.subjecttectonics
dc.subjectplanetary
dc.subjectdeformation
dc.subjectimpact
dc.titleZircon U-Pb strain chronometry reveals deep impact-triggered flow
dc.typeJournal Article
dcterms.source.volume277
dcterms.source.number1-2
dcterms.source.startPage73
dcterms.source.endPage79
dcterms.source.issn0012821X
dcterms.source.titleEarth and Planetary Science Letters
curtin.note

Copyright © 2009 Elsevier B.V. All rights reserved

curtin.accessStatusOpen access
curtin.facultyDepartment of Applied Geology
curtin.facultyScience and Engineering


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record