Zoned olivines in four Apollo 12 samples

@inproceedings{Gibb1971ZonedOI,
  title={Zoned olivines in four Apollo 12 samples},
  author={F. G. F. Gibb and J. Zussman},
  year={1971}
}
The distributions of Fe, Mg, Si, Ca, Mn, and Cr in selected olivine crystals from 12040, 12052, 12075 and 12076 have been determined by electron probe analysis. The results indicate that all crystals are continuously zoned, almost certainly as a result of fractional crystallization. 12040 contains two populations of olivine crystals, one of which could have been introduced by crystal settling. 12052, 12075 and 12076 have olivine and chrome spinel as the first crystalline phases and all three… CONTINUE READING