We review the crystallization of the iron meteorite chemical groups, the thermal history of the irons as revealed by the metallographic cooling rates, the ages of the iron meteorites and their relationships with other meteorite types, and the formation of the iron meteorite parent bodies. Within most iron meteorite groups, chemical trends are broadly consistent with fractional crystallization, ...

S FOR TH INTERNATIONAL WORKSHOP ON METEORITE IMPACT ON TH EARLY EARTH

Introduction: Since the first Antarctic meteorite concentrations were discovered more than 25 years ago, many theories regarding the role of iceflow in the production of meteorite concentrations have been put forward , and most agree on the basic principles [1-3]. These models suggest that as the East Antarctic icesheet flows toward the margins of the continent, meteorites randomly located with...

A number of recent quantitative mineralogical interpretations of S-type asteroids have identified compositions consistent with partially differentiated assemblages [e.g., 1-5]. However, partially differentiated meteorites (often designated as " primitive achon-drites ") constitute only a tiny fraction of the meteorite falls represented in terrestrial collections (~0.2% [6]). These two results w...

1. Introduction: Here we analyze the chronology and statistical distribution of lunar meteorites with emphasis on the spatial and temporal distribution of lunar mare basalts. The data are mostly from the Lunar Meteorite Compendium (http://www-curator.jsc.nasa.gov/ ant-met/lmc/contents.cfm cited hereafter as Compendium) compiled by Kevin Righter, NASA Johnson Space Center , and from the associat...