Soil Radon and Elemental Mercury Distribution and Relation to Magmatic Resurgence at Long Valley Caldera
- 9 August 1985
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 229 (4713) , 551-553
- https://doi.org/10.1126/science.229.4713.551
Abstract
The response of a large geothermal system to magmatic resurgence was analyzed by a survey of soil gas radon and elemental mercury at 600 sites in the silicic Long Valley Caldera, California. The broad geochemical anomaly over the caldera has superimposed on it a small zone of pronounced radon enrichment and mercury depletion coincident with the surface projection of a postulated dike of rising magma. Soil gas geochemistry studies can complement traditional geophysical and geodetical methods in the evaluation of potential volcanic eruption hazards.Keywords
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