On February 28, 1965, the Taonan chondrite fell near the northwest of Taonan County,Jilin Province (122°E, 45°47'N). The total recovered mass was about 3.75 kg in weight(2,550, 1,100 and 100 g). Tts chem...On February 28, 1965, the Taonan chondrite fell near the northwest of Taonan County,Jilin Province (122°E, 45°47'N). The total recovered mass was about 3.75 kg in weight(2,550, 1,100 and 100 g). Tts chemical composition shows that the Taonan chondrite belongs to L-group chondrites. Petrochemically, it should be designated to type 5. The major minerals present in the chondrite include:olivine (Fo=23±% ), orthopyroxene (Fs=20±%), plagioclase, zircon, quartz, kamacite, taenite, troilite, chromite native copper and cassiterite. Shock effect is obvious in olivine and orthopyroxene. Two stages of evolution have been involved in the crystallization of troilite.展开更多
文摘On February 28, 1965, the Taonan chondrite fell near the northwest of Taonan County,Jilin Province (122°E, 45°47'N). The total recovered mass was about 3.75 kg in weight(2,550, 1,100 and 100 g). Tts chemical composition shows that the Taonan chondrite belongs to L-group chondrites. Petrochemically, it should be designated to type 5. The major minerals present in the chondrite include:olivine (Fo=23±% ), orthopyroxene (Fs=20±%), plagioclase, zircon, quartz, kamacite, taenite, troilite, chromite native copper and cassiterite. Shock effect is obvious in olivine and orthopyroxene. Two stages of evolution have been involved in the crystallization of troilite.
