Abstract-Sychevka is a relatively unweathered 65-kg iron meteorite that was found in Russia in 1988. The microstructure, mineralogy and bulk composition ofSychevka as revealed by optical microscopy, electron microprobe and instrumental neutron activation analysis indicate that this meteorite is a group-IIIAB medium octahedrite. Sychevka consists of (in vol%): kamacite (82.5), plessite (16), schreibersite (1.5), and rare grains of chromite and troilite.
Abstract— Dengli is a highly weathered 243.5‐g chondrite that was found in 1976 in the Karakoom desert, Turkmenia. The meteorite contains olivine, high‐Ca and low‐Ca twinned pyroxenes, plagioclase, merrillite, cryptocrystalline material, and opaque minerals: metallic Fe, Ni, troilite, chromite. Based on the texture and the compositions of olivine (Fa19.6, n = 52, C.V. = 19.3) and low‐Ca pyroxene (Fs18.2, n = 27, C.V. = 17.0), Dengli is classified as an H3.8 breccia.
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