Constraining the shock conditions experienced by Haughton crystalline basement rocks: a combined Raman spectroscopy and electron backscatter diffraction study of Anomaly Hill zircons

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dc.contributor.authorWalton, Erin L.
dc.contributor.authorJurak, Haley A. M.
dc.contributor.authorTimms, Nick E.
dc.contributor.authorOsinski, Gordon R.
dc.date.accessioned2022-10-27T18:28:28Z
dc.date.available2022-10-27T18:28:28Z
dc.date.issued2020
dc.descriptionPresented on September 21-23, 2020 at the "GeoConvention 2020" virtual event.
dc.description.abstractHaughton is a 23-km diameter impact structure on Devon Island, Canada [1, 2]. The target stratigraphy comprised ~1880 m of Lower Paleozoic sedimentary rocks, unconformably overlying the Precambrian Canadian Shield [2]. Near the centre of the structure, is a location characterized by negative gravimetric and positive magnetic anomalies, known as “Anomaly Hill” [3]. Highlyshocked, pumice-like lithic clasts are abundant at this locale, and include gneissic and carbonaterich clasts [4, 5]. In this study, we examined 20 zircon grains from a single crystalline clast collected at Anomaly Hill, to reveal microstructures at the micrometer to nanometer scale. Earlier work on Haughton zircons [6] did not incorporate EBSD, and so, is missing a wealth of information to facilitate the identification of key microstructures including FRIGN (former reidite in granular neoblasts) zircon, non-FRIGN granular textures, neoblasts versus sub-grain rotation formation of subdomains, and various dissociation textures, as described in [7, 8]. The goal of our study is to constrain the shock conditions experienced by crystalline basement rocks at Haughton using zircon, a mineral that is increasingly recognized as a sensitive shock indicator.
dc.identifier.citationJurak, H. A. M., Walton, E. L., Timms, N. E., Osinski, G. R. (2020) Constraining the shock conditions experienced by Haughton crystalline basement rocks: a combined Raman spectroscopy and electron backscatter diffraction study of Anomaly Hill zircons. 2020 Geoconvention.
dc.identifier.urihttps://hdl.handle.net/20.500.14078/2844
dc.language.isoen
dc.rightsAll Rights Reserved
dc.subjectimpact structures
dc.subjectcrystalline basement rocks
dc.subjectshock
dc.titleConstraining the shock conditions experienced by Haughton crystalline basement rocks: a combined Raman spectroscopy and electron backscatter diffraction study of Anomaly Hill zircons
dc.typePresentation
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