Per Petaev et al: Coarse-grained, olivine groundmass (CGL), pyroxene-plagioclase poiklitic patches (PP), fine-grained domains of an opaque-rich lithology (ORL)

Chondritic source, partial melting, crystallization of part of the partial melt, removal of the still-liquid portion of the partial melt. CGL represents the residue of partial melting, PP is a portion of the partial melt that crystallized in situ. ORL was formed during the final stages of partial melting by reaction between gaseous sulfur and residual olivine in the source region.