Report on the 1997 activity of Shrub Mud Volcano, Wrangell-St.Elias National Park and Preserve, southcentral Alaska
Richter D, Symonds R, Rosenkrans D, Mcgimsey RG, Evans WC, Poreda RJ. 1998. Report on the 1997 activity of Shrub Mud Volcano, Wrangell-St.Elias National Park and Preserve, southcentral Alaska. U.S. Geological Survey (USGS) Open-File Report. 98-128
Shrub mud volcano, one of three in the Klawasi group in the Copper River Basin, Alaska, was reported to be erupting warm mud and co2-rich gas in the spring of 1997. Three on-site investigations of the renewed activity were made on 21 and 30 June and on 13 August 1997. The current activity is much more vigorous and the erupted products hotter than has been ovserved previousl at the Klawasi group of mud volcanoes. The mud and gas erupt from several circular depressions and fissure vents on the mud volcano. Activity ranges from quiet effusion of bubbling mud to violent discharges of mud and gas, which send mud up to 10 m above the vents. The gas discharges contain over 98% co2 and minor to trace amounts of meteroric gases… Isotopic data also confirm that He in these gases derives from magmatic and crustal sources. The co2 in the discharge gases is killing animals, birds and trees in the vicinity of the mud volcano and poses a life-threatening hazard to human visitors.
- Type
- Published Report
- Authors
- Richter, Donald; Symonds, Robert; Rosenkrans, Danny; Mcgimsey, R; Evans, W; Poreda, R
- Date of Issue
- 1998
- Units
- HIST , WRST
- Keywords
- 1997 activity, Analytical results, ehistory, Environmental Impacts, Gas sampling and analytical methods, Geologic setting and Historical activity, Geothermal/Volcanology, History, mud volcano, Southcentral Alaska, Visitor Use, Volcano, wildlife impacts