lodranite

Lodranite is a rare type of chondritic meteorite. It is classified within the ungrouped primitive achondrite category, meaning it does not fit neatly into the standard chondrite or achondrite classifications. Lodranites are characterized by their coarse-grained texture and a mineral composition that suggests a significant degree of metamorphism or partial melting after the formation of the chondrules.

The parent body from which lodranites originated is thought to have been an asteroid that experienced heating. This heating event caused some of the original chondritic material to melt and recrystallize, erasing many of the primitive features typically found in ordinary chondrites. Despite this alteration, lodranites still retain some chondritic components, indicating they are not fully differentiated achondrites.

Minerals commonly found in lodranites include olivine, orthopyroxene, plagioclase feldspar, and metal. They often exhibit a cumulate-like texture, with large mineral grains. The oxygen isotopic composition of lodranites is distinct from other meteorite groups, further supporting their classification as a unique type.

The rarity of lodranites makes them scientifically valuable. Their study provides insights into the thermal history and processes that occurred in the early solar system on small planetary bodies. Understanding lodranites helps scientists refine models of asteroid evolution and the diverse conditions present during planet formation. Only a handful of lodranite meteorites have been found on Earth, making each discovery significant for the field of cosmochemistry.