Shkurenko K. Mineralogy and origin of fine-grained material of the Krymka meteorite

Object of study - mineralogical and chemical characteristics of fine-grained chondrule rims of Krymka meteorite. The main aim of thesis is to identify mineral and chemical composition of dusty grains of protoplanetary nebula in different accretion periods of the Krymka meteorite parent body. The instruments used include scanning electron microscopy (SEM) with electron dispersive spectroscopy and electron microprobe. Structures of microchondrules sticking onto a chondrule surface and structures of penetration one microchondrule into another were founded for the first time. Such minerals as Ca-phosphate, corundum and Mg, Al-spinel in fine-grained rims were founded for the first time. The fine-grained material of the meteorite is divided on three groups witch indicating to three chemical zones of mineral dust.