Geochemistry of waters from springs, wells, and snowpack on and adjacent to Medicine Lake volcano, northern California
Geothermal Resources Council Transactions
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Abstract
Chemical analyses of waters from cold springs and wells of the Medicine Lake volcano and surrounding region indicate small chloride anomalies that may be due to water-rock interaction or limited mixing with high-temperature geothermal fluids. The Fall River Springs (FRS) with a combined discharge of approximately 37 m3/s, show a negative correlation between chloride (Cl) and temperature, implying that the Cl is not derived from a high-temperature geothermal fluid. The high discharge from the FRS indicates recharge over a large geographic region. Chemical and isotopic variations in the FRS show that they contain a mixture of three distinct waters. The isotopic composition of recharge on and adjacent to the volcano are estimated from the isotopic composition of snow and precipitation amounts adjusted for evapotranspiration. Enough recharge of the required isotopic composition (-100 parts per thousand ??D) is available from a combination of the Medicine Lake caldera, the Fall River basin and the Long Bell basin to support the slightly warmer components of the FRS (32 m3/s). The cold-dilute part of the FRS (approximately 5 m3/s) may recharge in the Bear Creek basin or at lower elevations in the Fall River basin.
Suggested Citation
Mariner, R.H., and Lowenstern, J.B., 1999, Geochemistry of waters from springs, wells, and snowpack on and adjacent to Medicine Lake volcano, northern California: Geothermal Resources Council Transactions, v. 23, p. 319-326.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Geochemistry of waters from springs, wells, and snowpack on and adjacent to Medicine Lake volcano, northern California |
| Series title | Geothermal Resources Council Transactions |
| Volume | 23 |
| Year Published | 1999 |
| Language | English |
| Publisher | Geothermal Resources Council |
| Publisher location | Davis, CA, United States |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geothermal Resources Council Transactions |
| First page | 319 |
| Last page | 326 |
| Conference Title | Global Geothermal Resources: Sustainable Energy for the Future |
| Conference Location | Reno, NV, USA |
| Conference Date | 17 October 1999 through 20 October 1999 |