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dc.contributor.authorFox-Powell, Mark G.
dc.contributor.authorOsinski, Gordon R.
dc.contributor.authorApplin, Daniel
dc.contributor.authorStromberg, Jessica M.
dc.contributor.authorGázquez, Fernando
dc.contributor.authorCloutis, Ed
dc.contributor.authorAllender, Elyse
dc.contributor.authorCousins, Claire R.
dc.identifier.citationFox-Powell , M G , Osinski , G R , Applin , D , Stromberg , J M , Gázquez , F , Cloutis , E , Allender , E & Cousins , C R 2019 , ' Natural analogue constraints on Europa's non-ice surface material ' , Geophysical Research Letters , vol. 46 , no. 11 , pp. 5759-5767 .
dc.identifier.otherPURE: 258819747
dc.identifier.otherPURE UUID: 34d1dfdb-85c8-40bf-add3-2b57c4b80455
dc.identifier.otherRIS: urn:45FCECB0D03BA0D54A138216667817ED
dc.identifier.otherScopus: 85067016543
dc.identifier.otherORCID: /0000-0002-3954-8079/work/60196587
dc.identifier.otherWOS: 000477616200015
dc.identifier.otherORCID: /0000-0002-0052-7895/work/64698160
dc.descriptionThis work was funded by The Leverhulme Trust (RPG-2016-153) and the Natural Sciences and Engineering Research Council of Canada. The Planetary Spectroscopy Facility, University of Winnipeg, is supported by the University of Winnipeg, the Canada Foundation for Innovation, the Manitoba Research Innovation Fund and the Canadian Space Agency.en
dc.description.abstractNon‐icy material on the surface of Jupiter's moon Europa is hypothesised to have originated from its subsurface ocean, and thus provide a record of ocean composition and habitability. The nature of this material is debated, but observations suggest that it comprises hydrated sulfate and chloride salts. Analogue spectroscopic studies have previously focused on single phase salts under controlled laboratory conditions. We investigated natural salts from perennially cold (<0 °C) hypersaline springs, and characterised their reflectance properties at 100 K, 253 K and 293 K. Despite similar major ion chemistry, these springs form mineralogically diverse deposits, which when measured at 100 K closely match reflectance spectra from Europa. In the most sulfate‐rich samples, we find spectral features predicted from laboratory salts are obscured. Our data are consistent with sulfate‐dominated europan non‐icy material, and further, show that the emplacement of endogenic sulfates on Europa's surface would not preclude a chloride‐dominated ocean.
dc.relation.ispartofGeophysical Research Lettersen
dc.rightsCopyright © 2019. American Geophysical Union. All Rights Reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at:
dc.subjectPlanetary analoguesen
dc.subjectNear-infrared reflectance spectroscopyen
dc.subjectGE Environmental Sciencesen
dc.titleNatural analogue constraints on Europa's non-ice surface materialen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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