Density, porosity and magnetic susceptibility of the Kosice meteorite shower and homogeneity of its parent meteoroid

摘要

Bulk and grain densities, porosities, and magnetic susceptibilities of 67 individuals of KoSice H chondrite fall were measured. The mean bulk and grain densities were determined to be 3.43 g/cm~3 with standard deviation (s.d.) of 0.11 g/cm~3 and 3.79 g/cm~3 with s.d. 0.07 g/cm~3, respectively. Porosity is in the range from 4.2 to 16.1. The logarithm of the apparent magnetic susceptibility (in 10~(-9) m~3/kg) shows narrow distribution from 5.17 to 5.49 with mean value at 5.35 with s.d. 0.08. These results indicate that all studied Kosice meteorites are of the same composition down to ～g scale without the presence of foreign (non-H) clasts and are similar to other H chondrites. KoSice is thus a homogeneous meteorite fall derived from a homogeneous meteoroid.