| Abstract: | Concentrations of Cr,Co,Ni,Cu,Ga,Ge,As,Sb,W,Re,Ir,Pt and Au of two ungrouped iron meteorites,Grove Mountains(GRV)98003 from Antarcti- ca and Ujimqin,were measured using instrumental neutron activation analysis.Ac- cording to the bulk chemistry,GRV 98003 is classified as a member of IAB group, and Ujimqin as a unique one of IAB iron meteorite complex.The elemental abun- dance pattern and correlation between elements(e.g.Ni-Au,Co-Au,As-Au,W- Au,Cu-Au,Sb-Au)of GRV 98003 are similar with those of NAW 468(IAB),but significantly depleted in refractory siderophile elements(Re,It)and moderate vola- tile elements(Ga,Ge)relative to the latter.In addition,we reclassify Nantan(Ⅱ- ICD)as a member of IAB main group(MG)and Yongning(IA)as a unique iron meteorite related with IAB iron meteorite complex. |
