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| Format: | Artículo científico |
| Language: | en |
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Universitat de Barcelona
2003
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| Online Access: | https://www.redalyc.org/articulo.oa?id=50510401 |
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| _version_ | 1866585638532284416 |
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| author | C. Ayora |
| author_facet | C. Ayora |
| contents | Role of fluid mixing in deep dissolution of carbonates C. Ayora M. Corbella Ciencias de la Tierra MVT deposits Fluid mixing Hydrothermal karst Reactive transport Carbonate dissolution The presence of cavities filled with new minerals in carbonate rocks is a common feature in oil reservoirs andlead-zinc deposits. Since groundwater equilibrates rapidly with carbonates, the presence of dissolution cavitiesin deep carbonate host rocks is a paradox. Two alternative geochemical processes have been proposed to dissolvecarbonates at depth: hydrogen sulfide oxidation to sulfuric acid, and metal sulfide precipitation. With the aid ofgeochemical modeling we show that mixing two warm solutions saturated with carbonate results in a new solutionthat dissolves limestone. Variations in the proportion of the end-member fluids can also form a supersaturatedmixture and fill the cavity with a new generation of carbonate. Mixing is in general more effective in dissolvingcarbonates than the aforementioned processes. Moreover, mixing is consistent with the wide set oftextures and mineral proportions observed in cavity infillings. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510401 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.1 |
| format | Artículo científico |
| id | redalyc_50510401 |
| language | en |
| publishDate | 2003 |
| publisher | Universitat de Barcelona |
| spellingShingle | Role of fluid mixing in deep dissolution of carbonates C. Ayora Ciencias de la Tierra MVT deposits Fluid mixing Hydrothermal karst Reactive transport Carbonate dissolution Role of fluid mixing in deep dissolution of carbonates C. Ayora M. Corbella Ciencias de la Tierra MVT deposits Fluid mixing Hydrothermal karst Reactive transport Carbonate dissolution The presence of cavities filled with new minerals in carbonate rocks is a common feature in oil reservoirs andlead-zinc deposits. Since groundwater equilibrates rapidly with carbonates, the presence of dissolution cavitiesin deep carbonate host rocks is a paradox. Two alternative geochemical processes have been proposed to dissolvecarbonates at depth: hydrogen sulfide oxidation to sulfuric acid, and metal sulfide precipitation. With the aid ofgeochemical modeling we show that mixing two warm solutions saturated with carbonate results in a new solutionthat dissolves limestone. Variations in the proportion of the end-member fluids can also form a supersaturatedmixture and fill the cavity with a new generation of carbonate. Mixing is in general more effective in dissolvingcarbonates than the aforementioned processes. Moreover, mixing is consistent with the wide set oftextures and mineral proportions observed in cavity infillings. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510401 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.1 |
| title | Role of fluid mixing in deep dissolution of carbonates |
| topic | Ciencias de la Tierra MVT deposits Fluid mixing Hydrothermal karst Reactive transport Carbonate dissolution |
| url | https://www.redalyc.org/articulo.oa?id=50510401 |