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Earth science

Silicon-enhanced core

What elements, besides iron, make up Earth's core? Discrepancies in the isotopic ratios found in rocks from Earth's mantle and in undisturbed meteoritic material indicate strongly that one answer is silicon.

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Figure 1: Divided Earth.


  1. Georg, R. B., Halliday, A. N., Schauble, E. A. & Reynolds, B. C. Nature 447, 1102–1106 (2007).

    ADS  CAS  Article  Google Scholar 

  2. Bigeleisen, J. & Mayer, M. G. J. Chem. Phys. 15, 261–267 (1947).

    ADS  CAS  Article  Google Scholar 

  3. Wade, J. & Wood, B. J. Earth Planet. Sci. Lett. 236, 78–95 (2005).

    ADS  CAS  Article  Google Scholar 

  4. Takafuji, N., Hirose, K., Mitome, M. & Bando, Y. Geophys. Res. Lett. 32, doi:10.1029/2005GL022773 (2005).

  5. Hart, S. R. & Zindler, A. Chem. Geol. 57, 247–267 (1986).

    ADS  CAS  Article  Google Scholar 

  6. Poitrasson, F., Levasseur, S. & Teutsch, N. Earth Planet. Sci. Lett. 234, 151–164 (2005).

    ADS  CAS  Article  Google Scholar 

  7. Polyakov, V. B. & Mineev, S. D. Geochim. Cosmochim. Acta 64, 849–865 (2000).

    ADS  CAS  Article  Google Scholar 

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Elliott, T. Silicon-enhanced core. Nature 447, 1060–1061 (2007).

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