Partitioning of molybdenum to 60 kbar along a warped Fe-FeS liquidus

Publication Type  Journal Article
Year of Publication  2008
Authors  Walker, D.; Li, J.
Journal Title  Chemical Geology
Volume  248
Issue  3-4
Pages  166-173
Journal Date  Feb 28
ISBN Number  0009-2541
Accession Number  ISI:000255084700004
Key Words  molybdenum partitioning; liquid metal; solid metal; sulfide liquid; pressure; solution properties; ni-s system; siderophile elements; rich portion; core; alloys; mo

Mo partitioning between crystalline and liquid metal alloy shows a continuous change with pressure from siderophile to chalcophile behavior at 1100 degrees C in the interval 0-60 kbar. Pressure is shown to be only a minor direct causative factor in this change. Unusual Fe-S liquid solution behavior causes Fe to dissolve instead of precipitate from solution with increasing pressure to 60 Bar at temperatures up to similar to 1375 degrees C. This pathology drives changes in D-Mo that overshadow any direct pressure effect on D-Mo. The ability to separate the pressure and compositional effects on D-Mo arises through the warpage in pressure of the Fe-S liquidus. (C) 2007 Elsevier B.V. All rights reserved.


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URL  <Go to ISI>://000255084700004
DOI  DOI 10.1016/j.chemgeo.2007.04.006