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• W2121755657 endingPage "340" @default.
• W2121755657 startingPage "327" @default.
• W2121755657 abstract "The partitioning of 15 major to trace metals between monosulfide solid solution (MSS), sulfide liquid (SL) and mafic silicate melt (SM) was determined in piston-cylinder experiments performed at 1175–1300 °C, 1.5–3.0 GPa and oxygen fugacities ranging from 3.1 log units below to 1.0 log units above the quartz–fayalite–magnetite fO2 buffer, which conditions are representative of partial melting in the upper mantle in different tectonic settings. The silicate melt was produced by partial melting of a natural, amphibole-rich mantle source rock, resulting in hydrous (∼5 wt% H2O) basanitic melts similar to low-degree partial melts of metasomatized mantle, whereas the major element composition of the starting sulfide (∼52 wt% Fe; 39 wt% S; 7 wt% Ni; 2 wt% Cu) was similar to the average composition of sulfides in this environment. SL/SM partition coefficients are high (≥100) for Au, Ni, Cu, Ag, Bi, intermediate (1–100) for Co, Pb, Sn, Sb (±As, Mo), and low (≤1) for the remaining elements. MSS/SM partition coefficients are generally lower than SL/SM partition coefficients and are high (≥100) for Ni, Cu, Au, intermediate (1–100) for Co, Ag (±Bi, Mo), and low (≤1) for the remaining elements. Most sulfide–silicate melt partition coefficients vary as a function of fO2, with Mo, Bi, As (±W) varying by a factor >10 over the investigated fO2 range, Sb, Ag, Sn (±V) varying by a factor of 3–10, and Pb, Cu, Ni, Co, Au, Zn, Mn varying by a factor of 3–10. The partitioning data were used to model the behavior of Cu, Au, Ag, and Bi during partial melting of upper mantle and during fractional crystallization of primitive MORB and arc magmas. Sulfide phase relationships and comparison of the modeling results with reported Cu, Au, Ag, and Bi concentrations from MORB and arc magmas suggest that: (i) MSS is the dominant sulfide in the source region of arc magmas, and thus that Au/Cu ratios in the silicate melt and residual sulfides may decrease with increasing degree of partial melting, (ii) both MSS and sulfide liquid are precipitated during fractional crystallization of MORB, and (iii) fractional crystallization of arc magmas is strongly dominated by MSS." @default.
• W2121755657 created "2016-06-24" @default.
• W2121755657 creator A5008947832 @default.
• W2121755657 creator A5066572736 @default.
• W2121755657 date "2012-11-01" @default.
• W2121755657 modified "2023-10-15" @default.
• W2121755657 title "Partitioning of V, Mn, Co, Ni, Cu, Zn, As, Mo, Ag, Sn, Sb, W, Au, Pb, and Bi between sulfide phases and hydrous basanite melt at upper mantle conditions" @default.
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• W2121755657 doi "https://doi.org/10.1016/j.epsl.2012.08.008" @default.
• W2121755657 hasPublicationYear "2012" @default.
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