| Abstract: | The experimental metal solubilities for rock-buffered hydrothermal systems provide important insights into the acquisition, transport, and deposition of metals in real hydrothermal systems that produced base metal ore deposits. Water-rock reactions that determine pH, together with total chloride and changes in temperature and fluid pressure, play significant roles in controlling the solubility of metals and determining where metals are fixed to form ore deposits. Deposition of metals in hydrothermal systems occurs where changes such as cooling, pH increase due to rock alteration, boiling, or fluid mixing cause the aqueous metal concentration to exceed saturation. Metal zoning results from deposition occurring at successive saturation surfaces. Zoning is not a reflection simply of relative solubility but of the manner of intersection of transport concentration paths with those surfaces. Saturation surfaces will tend to migrate outward and inward in prograde and retrograde time, respectively, controlled by either temperature or chemical variables. -from Authors |
| Genre: | Article |
| ProdID: | 70016607 |
| Citation Author: | Hemley, J. J.; Hunt, J. P. |
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| Citation End Page: | 43 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 21 |
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| Citation Search Results Text: | Hydrothermal ore-forming processes in the light of studies in rock- buffered systems: II. Some general geologic applications; 1992; Article; Journal; Economic Geology; Hemley, J. J.; Hunt, J. P. |
| Citation Start Page: | 23 |
| Citation Volume: | 87 |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Hydrothermal ore-forming processes in the light of studies in rock- buffered systems: II. Some general geologic applications; 1992; Article; Journal; Economic Geology; Hemley, J. J.; Hunt, J. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1992 00:00 -0600 |
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