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dc.contributor.authorJaret, Steven J.
dc.contributor.authorRasbury, E. Troy
dc.contributor.authorReiners, Peter
dc.contributor.authorSpray, John G.
dc.contributor.authorThompson, Lucy M.
dc.contributor.authorHemming, Sidney R.
dc.contributor.authorThompson, Michelle S.
dc.date.accessioned2024-04-18T15:45:56Z
dc.date.available2024-04-18T15:45:56Z
dc.date.issued2023-02-07
dc.identifier.citationSteven J. Jaret, E. Troy Rasbury, Peter Reiners, John G. Spray, Lucy M. Thompson, Sidney R. Hemming, Michelle S. Thompson; Extreme isotopic heterogeneity in impact melt rocks: Implications for Martian meteorites. Geology 2023;; 51 (3): 295–299. doi: https://doi.org/10.1130/G50564.1en_US
dc.identifier.issn0091-7613
dc.identifier.doi10.1130/g50564.1
dc.identifier.urihttp://hdl.handle.net/10150/672265
dc.description.abstractLead isotope ratios have been determined in multiple feldspar grains from hand samples of impact melt rock at the Manicouagan and Sudbury impact structures in Canada. The results reveal an extreme range of isotope values. This indicates that melt sheets are not homogeneous with respect to Pb at the millimeter scale. Such heterogeneity is significantly larger than that seen in non-impact-generated igneous rocks. Individual Pb isotope ratios of feldspars from Martian shergottites show a large range in 206Pb/204Pb values within one sample, more similar to the terrestrial impact melt sheets than to nonimpact igneous rocks. We suggest crystallization from impact melt sheets rather than volcanic sources as a petrogenetic model for some of the Martian shergottites.en_US
dc.language.isoenen_US
dc.publisherGeological Society of Americaen_US
dc.rights© 2023 Geological Society of America.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.subjectGeologyen_US
dc.titleExtreme isotopic heterogeneity in impact melt rocks: Implications for Martian meteoritesen_US
dc.typeArticleen_US
dc.identifier.eissn1943-2682
dc.contributor.departmentDepartment of Geosciences, University of Arizonaen_US
dc.identifier.journalGeologyen_US
dc.description.note12 month embargo; first published 07 February 2023en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleGeology
dc.source.volume51
dc.source.issue3
dc.source.beginpage295
dc.source.endpage299
refterms.dateFOA2024-02-07T00:00:00Z


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