Chemical and isotopic investigations of groundwater in potential geothermal areas in Hawaii

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ID: 298802
1977
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Abstract
The chemical and isotopic compositions of Hawaiian groundwater were studied to locate and evaluate potential geothermal areas. Analyses were made of forty-three samples from twenty-seven wells, two coastal springs, local precipitation, and steam. Three methods of chemical geothermometry were applied: (1) silica, (2) Na-K-Ca, and (3) stable isotope or deuterium-oxygen-18. Based on the silica and stable isotope methods, the most promising geothermal areas are the summit of Kilauea Volcano and the area near geothermal test hole 3 in the Puna district (east rift zone of Kilauea Volcano). There, temperatures calculated from dissolved silica range from about 160 degrees to 275 degrees C. Mixing with cooler groundwaters appears to be a significant feature of these geothermal reservoirs. Seawater intrusion, possibly due to thermal disruption of the equilibrium of the Ghyben-Herzberg lens in geothermal areas, tends to interfere with the geothermometry of the Na-K-Ca and stable isotope methods.
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openalex_W2146316387 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gary M. McMurtry, Pow-Foong Fan, Tyler B. Coplen
Journal american journal of science
Year 1977
DOI
10.2475/ajs.277.4.438
URL
https://ajs.scholasticahq.com/article/59901.pdf
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