Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....2396l&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #2396
Physics
Scientific paper
Core formation is one of the major events in early planetary differentiation. For terrestrial planets, an efficient way to form the core is through gravitational segregation in a magma ocean. The hypothesis of core formation in a deep magma ocean has been tested by experimental results on the partitioning of siderophile/chalcophile elements under high pressures and high temperatures. While abundant data have been reported for refractory elements, those on volatile elements are relatively sparse. Here, we review the existing data on the partitioning of volatile elements between core-forming alloys and mantle silicates under the pressure and temperature conditions that are pertinent to the formation and evolution of the Earth and planetary cores. We will also report new experimental data on the partitioning of a number of volatile elements (including Cu, Zn, Ga, Ge, Ag, and Pb) between liquid Fe-Ni-S alloy and liquid silicate, up to 20 GPa and 2273 K. The implications for the origin and evolution of terrestrial cores will be discussed.
Agee Carl B.
Horn Ingo
Li Jiying
McDonough William F.
Rudnick Roberta
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