Features of olivine crystallization in ordinary chondrites (Saratov meteorite): geochemistry of trace and rare earth elements

The paper discusses the geochemistry of major (EPMA) and trace (SIMS) elements in olivine porphyritic, nonporphyritic chondrules, matrix equilibrated ordinary chondrite Saratov (L4). Olivine corresponds to forsterite is rather heterogeneous (Fo 73-77). No differences content chondrule meteorite were found. However, within chondrules varies considerably; high values found from barred chondrules. porphyritic have similar concentrations elements. High refractory (Zr, Y, Al) moderately volatile (Sr Ba) indicate melt formation due melting precursor minerals its rapid cooling protoplanetary disk, which consistent with experimental data. center differs rims by increased Yb/La ratio. relict grains magnesian cores Individual are distinguished their enrichment relative rest chondrule.