Meteorite ''Harvard University'', a Newly Discovered Lodranite-Like ''Mesosiderite''

摘要

A short description of a recently discovered meteorite of a very unusual type, with relations to pallasites and mesosiderites resp. It is a fragment of originally less than 40 g, without a trace of the fusion crust. Containing about 50% in kamacite (+ troilite) and 50% in silicates, it belongs to the mesosiderites senso lato. The silicates consist of olivine in large, partly rounded euhedral grains, bronzite, plagioclase, these three in about equal amounts, and a component of very low refractive index, stated with microsonde to be tridymite. This assemblage is very near to the extremely rare type ''lodranite''. The minor constituents: chromite, ilmenite and rutile in their properties correspond exactly with these minerals occurring in mesosiderites of the type Vaca Muerta. (ERA citation 03:051333)