MIL 03443 , a dunite from asteroid 4 Vesta : Evidence for its classification and cumulate origin

  title={MIL 03443 , a dunite from asteroid 4 Vesta : Evidence for its classification and cumulate origin},
  author={Andrew W. Beck and David W. Mittlefehldt and M HarryY. and SWEEN and Douglas Rumble and Cin-Ty A. Lee and Robert J. Bodnar},
The absence of dunite (>90 vol% olivine) in the howardite, eucrite, and diogenite (HED) meteorite suite, when viewed with respect to spectroscopic and petrologic evidence for olivine on Vesta, is problematic. Herein, we present petrologic, geochemical, and isotopic evidence confirming that Miller Range (MIL) 03443, containing 91 vol% olivine, should be classified with the HED clan rather than with mesosiderites. Similarities in olivine and pyroxene FeO ⁄MnO ratios, mineral compositions, and… CONTINUE READING


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