Dergaon Meteorite: A Preliminary Geochemical Investigation.

Abstract

A preliminary investigation of Dergaon meteorite has been undertaken
for selective chemical composition of Fe, AI, Si, Cu, Mn
and P and abundance of opaque and non-opaque mineral constituents
in it Preliminary petrographic investigations suggested that the
Dergaon meteorite belongs to the chondritic class, having primary
silicate minerals like olivine, pyroxene, minor plagioclase feldspar
and glassy groundmass containing small droplets of iron and troilite.
Opaque minerals mostly comprise of troilite, kamacite, taenite,
schreibersite, chalcopyrite with minor cohenite, sphalerite, graphite
and pyrite. Chemical analysis revealed that the meteorite is composed
mainly of silicates (57.69%), iron (32.8%) and phosphorus
(1.04%). Volumetric estimate by modal analysis roughly conforms
the chemical data.