Abstract:Meteorites rain landed in Juancheng county of Shandong province are olivine-bronzite chondrites. Metallic minerals in the meteorite are mainly kamacite and troilite, and accompanied by edmonsonite. Metallic mineralso were found in the interstitial olivine and bronzite-based intergranular silicate minerals and spherules around. Microscopic worm-like crystal stock composed of kamacite and troilite can be seen in meteorite. It is formed by separated function of solid solution of metallic minerals in the meteorite during the cooling period. As showed by distribution characteristics of metallic minerals, metal Fe-Ni and sulfide (FeS) are the products of different stages of nebular condensation. As showed by compositions and fabric characteristics of metallic minerals in meteorite, spherules structures in meteorites and grate structures characteristics, the chondrite is a product of rapid cooling of the nebula materials.
