Metal and associated phases in Krymka and Chainpur - Nebular formational processes

The opaque minerals of unequilibrated ordinary chondrites preserve numerous chemical and textural properties acquired during processes that occurred in the primitive solar nebula. Attention is presently given to the highly unequilibrated LL3 chondrites Krymka and Chainpur, together with the unequilibrated ordinary chondrite Bishunpur. Most metal-poor chondrules in these chondrites appear to have formed from precursors that had required significant amounts of FeO as a result of reaction with the nebular gas down to low temperatures. Low Ni concentrations in chondrule kamacite may largely be due to dilution by Fe which was reduced from the silicates during chondrule formation.