An experimental study on the partition of zinc and lead between the silicate and sulfide liquids |
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| Authors: | H Shimazaki W H MacLean |
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| Institution: | (1) Geological Institute, Faculty of Science, University of Tokyo, Hongo, 113 Tokyo, Japan;(2) Department of Geological Sciences, McGill University, Station A, Box 6070, H3C 3G1 Montreal, Quebec, Canada |
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| Abstract: | On the basis of experimental works in the FeS-FeO-SiO2(-Fe3O4 or -Na2O) system with synthetic ZnS or PbS, the partition of zinc and lead between silicate and sulfide liquids is shown to be affected by the oxygen content of the sulfide liquids. The partition coefficients K, metal wt. % in sulfide liquid / metal wt. % in silicate liquid, for zinc and lead go through a minimum at relatively low oxygen contents of the sulfide liquids. KZn and KPb for natural sulfide liquids in equilibrium with basic magmas near the earth's surface are estimated at 0.1–0.5 and greater than 10, respectively. Although KZn and KPb change appreciably with oxygen content of the sulfide liquids, they never become sufficiently high to concentrate zinc and lead in economic amounts in magmatic sulfide ores. |
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