Extreme isotopic heterogeneity in impact melt rocks: Implications for Martian meteorites
dc.contributor.author | Jaret, Steven J. | |
dc.contributor.author | Rasbury, E. Troy | |
dc.contributor.author | Reiners, Peter | |
dc.contributor.author | Spray, John G. | |
dc.contributor.author | Thompson, Lucy M. | |
dc.contributor.author | Hemming, Sidney R. | |
dc.contributor.author | Thompson, Michelle S. | |
dc.date.accessioned | 2024-04-18T15:45:56Z | |
dc.date.available | 2024-04-18T15:45:56Z | |
dc.date.issued | 2023-02-07 | |
dc.identifier.citation | Steven 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/G50564.1 | en_US |
dc.identifier.issn | 0091-7613 | |
dc.identifier.doi | 10.1130/g50564.1 | |
dc.identifier.uri | http://hdl.handle.net/10150/672265 | |
dc.description.abstract | Lead 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.iso | en | en_US |
dc.publisher | Geological Society of America | en_US |
dc.rights | © 2023 Geological Society of America. | en_US |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en_US |
dc.subject | Geology | en_US |
dc.title | Extreme isotopic heterogeneity in impact melt rocks: Implications for Martian meteorites | en_US |
dc.type | Article | en_US |
dc.identifier.eissn | 1943-2682 | |
dc.contributor.department | Department of Geosciences, University of Arizona | en_US |
dc.identifier.journal | Geology | en_US |
dc.description.note | 12 month embargo; first published 07 February 2023 | en_US |
dc.description.collectioninformation | This 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.version | Final accepted manuscript | en_US |
dc.source.journaltitle | Geology | |
dc.source.volume | 51 | |
dc.source.issue | 3 | |
dc.source.beginpage | 295 | |
dc.source.endpage | 299 | |
refterms.dateFOA | 2024-02-07T00:00:00Z |