Experimental determination of the reaction chalcopyrite + sulfur = pyrite + bornite from 350 to 500° C
The fugacity of sulfur along the curve representing the univariant equilibrium assemblage, chalcopyrite + bornite + pyrite + vapor, has been determined by the electrum tarnish method (1). The conditions of the equilibrium may be expressed by the equation (TP) - /°s 2 (T, 1 atm) = -50,730 + 56.95T (cal.) (350 - 500° C) (T in °K). With gentle curvature, the line may be extended upward to the invariant point at 568° C, which represents the assemblage chalcopyrite + bornite -j- pyrite + liquid + vapor (8).
Citation Information
Publication Year | 1964 |
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Title | Experimental determination of the reaction chalcopyrite + sulfur = pyrite + bornite from 350 to 500° C |
DOI | 10.2113/gsecongeo.59.5.747 |
Authors | P. B. Barton, P. Toulmin |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Economic Geology |
Index ID | 70221126 |
Record Source | USGS Publications Warehouse |