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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Contribution of methane to total gas pressure in deep waters at lakes Nyos and Monoun (Cameroon, West Africa)
Geochemical Journal, Volume 47, No. 3, Year 2013
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Description
A portable gas-analyser was used to perform on-site gas analysis at lakes Nyos and Monoun. Results were used to evaluate the effect of the dissolved CH4 on the gas saturation level. Although CH4 represents marginal proportion in term of the total gas concentration (∼2.2 mol % in Lake Monoun and ∼0.6 mol % in Lake Nyos) it contributes ∼37% and ∼19% to the total dissolved gas pressure and ∼23% and ∼13% to saturation level in lakes Monoun and Nyos respectively. The risk due to CH4 increase is evaluated and monitoring and surveillance measures proposed. Because methane is less more soluble than carbon dioxide, its increase may accelerate saturation of the lake waters with dissolved gas making gas eruptions more frequent. It is therefore recommended to regularly monitor the lakes in order to assess CH4 evolution for hazard mitigation purposes. If future monitoring surveys confirm current CH4increase, a device to extract deep rich-gas water must be experimented and put in place without delay. © 2013, GEOCHEMICAL SOCIETY OF JAPAN. All rights reserved.
Authors & Co-Authors
Issa,
Japan, Tokyo
Tokai University
Ohba, Takeshi
Japan, Tokyo
Tokai University
Chako-Tchamabé, Boris
Japan, Tokyo
Tokai University
Oginuma, Yu
Japan, Tokyo
Tokai University
Issa,
Cameroon, Yaounde
Institute for Geological and Mining Research Irgm
Fantong, Wilson Yetoh
Cameroon, Yaounde
Institute for Geological and Mining Research Irgm
Fouépé, Alain T.
Cameroon, Yaounde
Institute for Geological and Mining Research Irgm
Sigha, Nkamdjou
Cameroon, Yaounde
Institute for Geological and Mining Research Irgm
Tanyileke, Gregory Z.
Cameroon, Yaounde
Institute for Geological and Mining Research Irgm
Yoshida, Yutaka
Japan, Iwate Prefecture
Yoshida Consulting Engineer Office Morioka
Kusakabe, Minoru
Japan, Toyama
University of Toyama
Satake, Hiroshi
Japan, Toyama
University of Toyama
Hell, Joseph Victor
Japan, Toyama
University of Toyama
Tsunogai, Urumu
Japan, Nagoya
Nagoya University
Statistics
Citations: 14
Authors: 14
Affiliations: 5
Identifiers
Doi:
10.2343/geochemj.2.0250
ISSN:
00167002
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Qualitative
Study Locations
Multi-countries
Cameroon