Jul, 2009
Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle
AMERICAN MINERALOGIST
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- Volume
- 94
- Number
- 7
- First page
- 921
- Last page
- 925
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.2138/am.2009.3123
- Publisher
- MINERALOGICAL SOC AMER
Fe-Mg partitioning between perovskite and ferropericlase in the MgO-FeO-SiO2 system has been studied up to about 100 GPa at around 2000 K using a laser-heated diamond anvil cell (LHDAC). The compositions of both phases were determined by using analytical transmission electron microscopy (ATEM) on the recovered samples. Present results reveal that the Fe-Mg apparent partition coefficient between perovskite and ferropericlase [K-D(Pv/Fp) = ((XFeXMgFp)-X-Pv)/((XMgXFeFp)-X-Pv)] decreases with increasing pressure for a constant FeO of the system, and it decreases with increasing FeO content of ferropericlase. The gradual decrease of K-D(Pv/FP) with increasing pressure is consistent with the spin transition in ferropericlase Occurring in the broad pressure range from 50 to 100 GPa at around 2000 K.
- Link information
- ID information
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- DOI : 10.2138/am.2009.3123
- ISSN : 0003-004X
- eISSN : 1945-3027
- CiNii Articles ID : 80020485730
- Web of Science ID : WOS:000268149400007