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[PPS06-04] Refractory Siderophile Elements Depleted in AOA Metal
Keywords:Amoeboid olivine aggregates, Refractory siderophile elements, LA-ICP-MS, SIMS
The siderophile elements Cr, Mn, Fe, Co, Ni, Cu, Ga, Ge, Pd, W, Re, Os, Ir, Pt in AOA metals and chondrule metals from a polished thin section of Acfer 094 were measured by LA-ICP-MS at Tokyo University. The oxygen isotopes of forsterites in AOA were measured by SIMS at Hokkaido University.
The refractory siderophile elements were depleted in the AOA metal more than two orders of magnitude lower than the metal in chondrules. The complementarity of the refractory siderophile elements between CAI and AOA metal indicates the formation from the same district for both 16O-rich materials.
 Campbell A. J. et al. (1999) LPS XXX #1609.  Campbell et al. (2003) GCA 67, 3119-3134.  Campbell et al. (2001) GCA 65, 163-180.  Campbell and Humayun M. (2004) GCA 68, 3409-3422.  Campbell et al. (2002) GCA 66, 647-660.  Campbell et al. (2005) Meteoritics & Planet. Sci. 40, 1131-1148.