Identification and pairing reassessment of unequilibrated ordinary chondrites from four Antarctic dense collection areas

• Published in: Meteoritics & Planetary Science
• Main Authors: Righter, Kevin, Schutt, John, Lunning, Nicole, Harvey, Ralph, Karner, James
• Other Authors: National Aeronautics and Space Administration
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2021
• Subjects: Antarctic; Antarc*
• Online Access: http://dx.doi.org/10.1111/maps.13707; https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13707; https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13707; https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/maps.13707

Abstract New analyses of Cr 2 O 3 contents of olivines from type II chondrules in unequilibrated chondrites (UOC) from four dense collections are reported here. This survey of petrologic type 3 UOCs was undertaken to identify primitive chondrites that may have been overlooked, and to address possible pairing errors. We have identified 23 primitive UOCs (≤3.10) (only five identified previously, for a total of 28 overall), and also recommend other revisions to prior classifications and pairings.