| Abstract: | The combined solubilities of Fe, Zn and Pb sulphides were determined at elevated P and T in chloride solutions buffered in pH by a silicate assemblage of quartz monzonite composition plus added muscovite, and buffered in fS2 and fO2 by the assemblage pyrite-pyrrhotite-magnetite. Higher T and higher chloride concentration favour higher metal solubilities, but the P effect is opposite. At 500oC, 0.5 kbar and 1 M total chloride, Fe, Zn, Pb solubilities were 8500, 4300 and 8700 ppm, respectively, whereas at 1 kbar they were 4200, 2400 and 2600 ppm, and at 2 kbar, 1700, 800 and 1200 ppm. The P effect is of considerable importance to problems of ore-mineral transport; the metal could be carried over long distances on a decreasing P gradient so long as the T decreases were sufficient; this condition could be approximated by a near-adiabatic transport cooling path. Such a condition is probably common for hydrothermal processes involving fairly deep-seated sources of heat and mineral components.-L.C.H. |
| Genre: | Article |
| ProdID: | 70014634 |
| Citation Author: | Hemley, J. J.; Cygan, G. L.; D'Angelo, W. M. |
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| Citation End Page: | 379 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Effect of pressure on ore mineral solubilities under hydrothermal conditions.; 1986; Article; Journal; Geology; Hemley, J. J.; Cygan, G. L.; D‘Angelo, W. M. |
| Citation Start Page: | 377 |
| Citation Volume: | 14 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Effect of pressure on ore mineral solubilities under hydrothermal conditions.; 1986; Article; Journal; Geology; Hemley, J. J.; Cygan, G. L.; D‘Angelo, W. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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