| Abstract: | Abstract— In order to assess weathering effects, sixteen elements were determined by neutron activation in the surficial layer and the interior of the extensively weathered Bayard L5 chondrite. Na, As, Sb, La and Sm show enrichment in the surface; for these elements soil concentrations are greater than in the meteorite. Elements showing no significant differences between surface and interior are Sc, Cr, Fe, Co, Ni, Zn, Se, Eu, Yb, Ir and Au; with the exception of Eu and Yb, soil concentrations were lower than those in the chondrite. Concentrations of Fe, Ni and Co, and to some extent Na, are lower than the mean of the L-chondrite values probably due to oxidation and leaching from the chondrite. The data support an L classification for the Bayard chondrite. |
