Density, magnetic susceptibility, and the characterization of ordinary chondrite falls and showers

摘要: Bulk and grain densities of 132 ordinary chondrites from the Vatican Observatory collection were measured compared with their magnetic susceptibility (for most part using previously values; ten new measures taken for this study). Grain density combined provide a reliable method classifying un weathered chondrites. Unlike traditional chemical tests, is fast, nondestructive, characterizes whole rock, making it especially appropriate surveying large collections. The system less viable finds; extensive weathering metallic iron in an H chondrite can cause to plot among L chondrites, while heavily LL group. This has revealed outlier stones that may be misclassified meteorites or mislabeled samples; every case where meteorite does not fit its putative classification, also found disagreement manner consistent either severe misidentification. An analysis five showers shows that, excluding outliers, these samples tend cluster tightly within groups versus susceptibility.