An inference on the process of gas outburst from Lake Nyos, Cameroon

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doi: 10.1016/0377-0273(89)90054-1
Authors:Kanari, Sei-Ichi
Author Affiliations:Primary:
Hokkaido Univ., Dep. Geophys., Sapporo, Japan
Other:
Univ. Iceland, Iceland
Volume Title:Lake Nyos event and natural CO<sub>2</sub> degassing; I
Volume Authors:Le Guern, François, editor; Sigvaldason, Gudmundur E.
Source:The Lake Nyos event and natural CO<2` degassing; I, edited by François Le Guern and Gudmundur E. Sigvaldason. Journal of Volcanology and Geothermal Research, 39(2-3), p.135-149. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-0273
Publication Date:1989
Note:In English. 11 refs.; illus. incl. 5 tables, geol. sketch maps
Summary:A large volume of lethal gas was released from this lake on 21 August 1986. Some 50 days later a hydro-physical and -chemical survey was carried out. Vertical density distributions of lake water showed remarkably stable stratification through the water column and chemical analyses showed high concentrations of dissolved CO2 and Fe which contribute to stable stratification. The volume of released gas was estimated at 0.68 km3 and T drops calculated for every 10 m layer thickness. The calculated T profile agreed well with the profile measured by conductivity - T - depth profiles. The maximum height of the gas cloud over the lake was calculated as 110 m and the flow velocity of draining gas from the outlet of the rim as 19 m/s. [R.E.S.]
Subjects:Carbon dioxide; Degassing; Depth; Ejecta; Gases; Processes; Temperature; Toxic materials; Volcanism; Volcanology; Africa; Cameroon; Lake Nyos; West Africa; Northwestern Cameroon
Abstract Numbers:90M/3505
Record ID:1990016891
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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