EXPERIMENTAL PARTITIONING OF SIDEROPHILE ELEMENTS IN THE SYSTEMS IRON - NICKEL - SULFUR - PHOSPHORUS AND FORSTERITE - ANORTHITE - DIOPSIDE
AuthorMalvin, Daniel Joshua, 1959-
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PublisherThe University of Arizona.
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AbstractPartition coefficients in the Fe-Ni-S-P system measured utilizing "static" equilibration experiments cannot be reconciled with the results of "dynamic" experiments which mimic fractional crystallization. New tests of the "static" experiments demonstrate that they yield reliable equilibrium Ni, P and Ge partition coefficients. Partition coefficients in the Fe-Ni-S-P system are well matched by interpolation between the Fe-Ni-S and Fe-Ni-P subsystems. The crystal/liquid partitioning of Ga and Ge has been measured experimentally between forsterite, diopside, anorthite and spinel and melts in the forsterite-diopside-anorthite system. The coefficients for the exchange of Ga and Al and the exchange of Ge and Si between minerals and melts are within a factor of two of unity. Application of these results to the interpretation of natural basaltic samples demonstrates that Ga/Al and Ge/Si ratios can be used to discriminate between different mantle source regions.
Degree ProgramGraduate College