Geothermometer calculations for geothermal assessment
By: M.J. Reed and Robert H. Mariner
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Abstract
Geothermal exploration programs have relied on the calculation of geothermometers from hot spring chemistry as an early estimation of geothermal reservoir temperatures. Calibration of the geothermometers has evolved from experimental determinations of mineral solubility as a function of temperature to calibration from analyses of water chemistry from known depths and temperatures in thermal wells. Most of the geothermometers were calibrated from analyses of sodium-chloride type waters, and the application of some geothermometers should be restricted to waters of the chemical types that were used in their calibration. Chemical analyses must be determined to be reliable before they are used to calculate geothermometers. The USGS Geothermal Resource Assessment will rely on the silica geothermometer developed by Giggenbach that approximates the transition between chalcedony at 20??C and quartz at 200??C. Above 200??C, the assessment will rely on the quartz geothermometer. In addition, the assessment will also rely on the potassium-magnesium geothermometer.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Geothermometer calculations for geothermal assessment |
| Volume | 31 |
| Year Published | 2007 |
| Language | English |
| Publisher | Geothermal Resources Council |
| Description | 4 p. |
| Larger Work Title | Transactions - Geothermal Resources Council |
| First page | 89 |
| Last page | 92 |
| Conference Title | Geothermal Resources Council - Annual Meeting of the Geothermal Resources Council 2007 |
| Conference Location | Reno, NV |
| Conference Date | September 20-October 7, 2007 |
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