Geochemistry and origin of metal, olivine clasts, and matrix in the Dong Ujimqin Qi mesosiderite
作者： Ping Kong , Wen Su , Xianhua Li , Bernhard Spettel , Herbert Palme
DOI: 10.1111/J.1945-5100.2008.TB00665.X
关键词: Mesosiderite 、 Olivine 、 Parent body 、 Stony-iron meteorite 、 Meteorite 、 Geology 、 Mineralogy 、 Silicate 、 Fractional crystallization (geology) 、 Chondrite 、 Geochemistry
摘要: The Dong Ujimqin Qi mesosiderite is the first recorded fall of a stony-iron meteorite in China. According to silicate textures and metal composition, this classified as member subgroup IB. Instrumental neutron activation analyses (INAA) metals show that matrix has lower concentrations Os, Ir, Re, Pt, but higher Ni Au than 7.5 cm nodule present meteorite. We attribute these compositional differences fractional crystallization molten metal. Studies olivine clasts FeO contents are uniform individual crystals variable for different clasts. Although rare earth elements (REEs) change within clasts, they all exhibit vee-shaped pattern relative CI chondrites. relatively high REEs shape REE patterns require liquid especially light REEs. As such was absent from region where basaltic gabbroic formed, must have formed part differentiated asteroid location other formed.
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sci-hub.se 参考文章(35)
C. E. Nehru, G. E. Harlow, M. Prinz, J. S. Delaney, R. L. Bedell, Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 LPSC. ,vol. 2, pp. 1055- 1071 ,(1980)
R. J. Floran, Silicate petrography, classification, and origin of the mesosiderites: Review and new observations. LPSC. ,vol. 1, pp. 1053- 1081 ,(1978)
Edward Stolper, Experimental petrology of eucritic meteorites Geochimica et Cosmochimica Acta. ,vol. 41, pp. 587- 611 ,(1977) , 10.1016/0016-7037(77)90300-3
Compositions of chondrites Philosophical transactions - Royal Society. Mathematical, physical and engineering sciences. ,vol. 325, pp. 535- 544 ,(1988) , 10.1098/RSTA.1988.0066
S.J.B. Reed, E.R.D. Scott, J.V.P. Long, Ion microprobe analysis of olivine in pallasite meteorites for nickel Earth and Planetary Science Letters. ,vol. 43, pp. 5- 12 ,(1979) , 10.1016/0012-821X(79)90150-X
D. W. Mittlefehldt, A. E. Rubin, A. M. Davis, Mesosiderite Clasts with the Most Extreme Positive Europium Anomalies Among Solar System Rocks Science. ,vol. 257, pp. 1096- 1099 ,(1992) , 10.1126/SCIENCE.257.5073.1096
J.T. Wasson, J.W. Richardson, Fractionation trends among IVA iron meteorites: contrasts with IIIAB trends Geochimica et Cosmochimica Acta. ,vol. 65, pp. 951- 970 ,(2001) , 10.1016/S0016-7037(00)00597-4
Henning Haack, Edward R.D. Scott, Kaare L. Rasmussen, Thermal and shock history of mesosiderites and their large parent asteroid Geochimica et Cosmochimica Acta. ,vol. 60, pp. 2609- 2619 ,(1996) , 10.1016/0016-7037(96)00110-X
Edward R. D. SCOTT, Henning HAACK, Stanley G. LOVE, Formation of mesosiderites by fragmentation and reaccretion of a large differentiated asteroid Meteoritics & Planetary Science. ,vol. 36, pp. 869- 881 ,(2001) , 10.1111/J.1945-5100.2001.TB01927.X
Alan E. Rubin, Eric A. Jerde, Compositional differences between basaltic and gabbroic clasts in mesosiderites Earth and Planetary Science Letters. ,vol. 87, pp. 485- 490 ,(1988) , 10.1016/0012-821X(88)90011-8