Remarkable Diversity of Refractory Inclusions in the Miller Range 090019 CO3.1 Chondrite

Ross, D Kent ; Simon, J I ; Simon, S B

关键词: REFRACTORY MATERIALS;    CALCIUM;    ALUMINUM;    INCLUSIONS;    CHONDRITES;    SNC METEORITES;    X RAY SPECTRA;    SPINEL;    PYROXENES;    ANORTHOSITE;    SILICATES;    MARS SURFACE;    MINERALOGY;    SPECTROMETERS;    OLIVINE;    FELDSPARS;    AGGREGATES;   

RP-ID  :  JSC-E-DAA-TN65245

学科分类：天文学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

We have characterized the mineralogy, textures, bulk compositions, modal abundances and some mineral compositions in a suite of approximately 140 refractory inclusions from the MIL090019 carbonaceous chondrite. All of these 140 inclusions are found in a single thin section of this CO3.1 chondrite. These inclusions range from grossite- and hibonite-rich varieties, melilite-, spinel-, fassaite-diopside- and anorthite-rich types, and include a subset of aluminous AOAs (amoeboidal olivine aggregates). Grossite- and hibonite-bearing inclusions were discussed briefly in previous abstracts. X-ray mapping by energy dispersive spectrometry has permitted us to extract the bulk compositions of these inclusions from hyperspectral x-ray datasets. The bulk compositions of these inclusions represent the full range of recognized CAI (Calcium-Aluminum–rich Inclusions) types.