On September 10, 1978, the Lishui ehondrite fell near Lishui County, Jiangsu Province (31°38'N, 118°59″E). The recovered mass was 498g in weight. Chemical analysis gave: SiO2 39.10, FeO 13.64, TiO2 0.11...On September 10, 1978, the Lishui ehondrite fell near Lishui County, Jiangsu Province (31°38'N, 118°59″E). The recovered mass was 498g in weight. Chemical analysis gave: SiO2 39.10, FeO 13.64, TiO2 0.112, Al2O3 1.952, CaO 1.691,MgO 25.46, K2O 0.106, Na2O 1.041, P2O5 0.255, MnO 0.325, Cr2O3 0.533, CO3 0.056, Fe 7.488, Ni 1.293, Pb0.008, Zn 0.062, FeS 6.405, HsO^+ 0.10, total 99.683. Fifteen minerals identified in the meteorite are chrysolite (Fa 24%), bronzite,hypersthene, kamaeite, taenite, treifite, plagioclase, chromite, whithockite, apatite,calcite, quartz, zircon, magnetite, and hematite. Modal analysis gave: the first 7 minerals totalling 97.89% (olivine 45.36%, pyroxene 27.98%). The texture of chondrite is very complicated. Chondrules may be classified as monasomatic and polysomatic.Ones there is a wide range of textural type in polysomatie chondrules. Chemico-petrological studies have shown that the meteorite belongs to L-greup ehondrites,and petrologically to type 5.展开更多
文摘On September 10, 1978, the Lishui ehondrite fell near Lishui County, Jiangsu Province (31°38'N, 118°59″E). The recovered mass was 498g in weight. Chemical analysis gave: SiO2 39.10, FeO 13.64, TiO2 0.112, Al2O3 1.952, CaO 1.691,MgO 25.46, K2O 0.106, Na2O 1.041, P2O5 0.255, MnO 0.325, Cr2O3 0.533, CO3 0.056, Fe 7.488, Ni 1.293, Pb0.008, Zn 0.062, FeS 6.405, HsO^+ 0.10, total 99.683. Fifteen minerals identified in the meteorite are chrysolite (Fa 24%), bronzite,hypersthene, kamaeite, taenite, treifite, plagioclase, chromite, whithockite, apatite,calcite, quartz, zircon, magnetite, and hematite. Modal analysis gave: the first 7 minerals totalling 97.89% (olivine 45.36%, pyroxene 27.98%). The texture of chondrite is very complicated. Chondrules may be classified as monasomatic and polysomatic.Ones there is a wide range of textural type in polysomatie chondrules. Chemico-petrological studies have shown that the meteorite belongs to L-greup ehondrites,and petrologically to type 5.
