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Scrubbing masks magmatic degassing during repose at Cascade-Range and Aleutian-Arc volcanoes

Dates

Year
2003

Citation

Symonds, Robert B, Janik, C J, Evans, W C, Ritchie, B E, Counce, Dale, Poreda, R J, and Iven, Mark, 2003, Scrubbing masks magmatic degassing during repose at Cascade-Range and Aleutian-Arc volcanoes: United States Geological Survey.

Summary

Between 1992 and 1998, we sampled gas discharges from =173?C fumaroles and springs at 12 quiescent but potentially restless volcanoes in the Cascade Range and Aleutian Arc (CRAA) including Mount Shasta, Mount Hood, Mount St. Helens, Mount Rainier, Mount Baker, Augustine Volcano, Mount Griggs, Trident, Mount Mageik, Aniakchak Crater, Akutan, and Makushin. For each site, we collected and analyzed samples to characterize the chemical (H2O, CO2, H2S, N2, CH4, H2, HCl, HF, NH3, Ar, O2, He) and isotopic (a13C of CO2, 3He/4He, 40Ar/36Ar, a34S, a13C of CH4, a15N, and aD and a18O of water) compositions of the gas discharges, and to create baseline data for comparison during future unrest. The chemical and isotopic data show that these gases [...]

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  • USGS National Research Program

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Added to ScienceBase on Thu Apr 18 13:28:47 MDT 2013 by processing file <b>Hydrogeochemical and Biogeochemical Studies of Volcanic and Geothermal Systems.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/504216bae4b04b508bfd3391">https://www.sciencebase.gov/catalog/item/504216bae4b04b508bfd3391</a>

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Report Number http://sciencebase.gov/vocab/identifierScheme OFR - 2003-435

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