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

1Kevin Righter,2John Schutt,1Nicole Lunning,2Ralph Harvey,3James Karner
Meteoritics & Planetary Science (in Press) Link to Article [https://doi.org/10.1111/maps.13707]
1ARES, Mailcode XI2, NASA-JSC, Houston, Texas, 77058 USA
2Department of Earth, Environmental, and Planetary Science, Case Western Reserve University, 10900 Euclid Ave, Cleveland, Ohio, 44106 USA
3Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, 84113 USA
Published by arrangement with John Wiley & Sons

New analyses of Cr2O3 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.

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