| Title | Thermometric Study of Copahue Geothermal Field; Argentina |
|---|---|
| Authors | Graciela R. Mas, Leandro Bengochea, Luis C. Mas |
| Year | 2005 |
| Conference | World Geothermal Congress |
| Keywords | thermometry, Fluid inclusions, Copahue |
| Abstract | The objective of this work is to carry out the application of different geothermometers on samples of two wells of the Copahue Geothermal Field and to compare the results obtained with all of them and with the present day measurements and the stabilized temperatures. Hydrothermal alteration of the rock depends upon several factors such as temperature, pressure, lithology and subsurface structure of the rocks and a close correlation between the temperature and the type of secondary minerals is found in most geothermal systems of the world. The secondary minerals in Copahue can be divided in clay minerals: smectites, C/S, chlorites and illite; zeolitic minerals: stilbite, laumontite and wairakite; and Ca-Al silicate minerals: epidote, prehnite, actinolite and garnet; besides quartz and calcite. Fluid inclusions in quartz and calcite contain low salinity waters and have homogenization temperatures of up to 300?C in the deepest samples. |