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Volumn 288, Issue 5467, 2000, Pages 839-841

Large-scale thermal events in the solar nebula: Evidence from Fe,Ni metal grains in primitive meteorites

Author keywords

[No Author keywords available]

Indexed keywords

IRON; NICKEL;

EID: 0034607815     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.288.5467.839     Document Type: Article
Times cited : (71)

References (31)
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    • (1988) Meteorites and the Early Solar System , pp. 680-696
    • Grossman, J.N.1
  • 2
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    • R. E. Hewins, R. H. Jones, E. R. D. Scott, Eds. Cambridge Univ. Press, Cambridge
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    • (1996) Chondrules and the Protoplanetary Disk , pp. 187-196
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  • 3
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    • -1, are the most abundant type of chondrules by far and are considered the most representative of the chondrule-forming process.
    • (1997) Meteorit. Planet. Sci , vol.32 , pp. 138
    • Weinbruch, S.1
  • 9
    • 0342649765 scopus 로고    scopus 로고
    • note
    • -5 bar. With decreasing gas temperature, the condensing metal is inferred to have decreasing Ni (30 to 5 wt %) and Co (0.8 to 0.2 wt %) concentrations (with a solar Co/Ni ratio) and increasing Cr (0 to 0.9 wt %) and Fe (70 to 95 wt %) concentrations. However, metal grains in most types of chondrites have subsequently experienced substantial secondary processing (e.g., melting, thermal metamorphism, and/or oxidation), which caused redistribution of Fe, Ni, Co, and Cr that partially or totally erased these chemical signatures of condensation.
  • 15
    • 0343955838 scopus 로고    scopus 로고
    • note
    • An origin of the zoned Fe,Ni metal grains in CH chondrites by reduction of silicates during chondrule formation can be ruled out because (i) at igneous temperatures (>1600 K) during chondrule formation, solid-state diffusion of Fe, Ni, Co, and Cr is so rapid that zoned Fe,Ni metal grains, which typically are 100 μm in radius, would become homogenized on a time scale of tens of minutes, comparable to the cooling time scale of most chondrules, and (ii) zoned Fe,Ni metal grains have never been observed inside chondrules.
  • 17
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    • note
    • -7 bar, only a small fraction of the partial pressure of Fe in the nebula gas. Although desorption of Fe atoms from the growing grains does take place, it happens at a relatively low rate compared with the rate of bombardment (Z) and does not substantially slow down the growth of the metal grain.
  • 20
    • 0003877758 scopus 로고
    • CRC Press, Boca Raton, FL, ed.
    • The diffusion coefficients of Ni, Co, and Cr in γ-Fe are essentially identical, with Ni being slightly faster [D. R. Lide, Ed., Handbook of Chemistry of Physics (CRC Press, Boca Raton, FL, ed. 79, 1981)].
    • (1981) Handbook of Chemistry of Physics , vol.79
    • Lide, D.R.1
  • 24
    • 0002192086 scopus 로고    scopus 로고
    • R. E. Hewins, R. H. Jones, E. R. D. Scott, Eds. Cambridge Univ. Press, Cambridge
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    • (1996) Chondrules and the Protoplanetary Disk , pp. 265-276
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    • D. C. Black and M. S. Matthews, Eds. Univ. of Arizona Press, Tucson, AZ
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    • (1985) Protostars and Planets II , pp. 981-1072
    • Lin, D.C.1    Papaloizou, J.2
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    • 0024250414 scopus 로고
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    • note
    • This collaboration between meteoriticists and astrophysicists was spurred by the 1999 Gordon Research Conference (Origins of Solar Systems), which brought together researchers from both disciplines in a highly inspiring scientific environment. Our work was supported by NASA grants 5-4212 (K. Keil, P.I.) and NAGW 3451 (J. A. Wood, P.I.) and NASA's Origins of Solar Systems program (J. Cuzzi, P.I.). A.M. is grateful for support from the Danish Natural Science Research Council S.J.D. was supported by a National Research Council Research Associateship. We appreciate illuminating discussions with R. Bell, H. Klahr, A. Showman, A. Luntz, F. Besenbacher, T. Fagan, E. Scott, and J. Taylor.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.