Geochemical and limnological survey on crater lakes in Cameroon
喀麦隆火山口湖地球化学和湖泊学调查
基本信息
- 批准号:63041090
- 负责人:
- 金额:$ 6.14万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Overseas Scientific Survey.
- 财政年份:1988
- 资助国家:日本
- 起止时间:1988 至 1989
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Outburst of a large amount of CO_2 dissolved in Lake Nyos, Cameroon, killed more than 1700 people on 21 August 1986. The surveys made soon after the gas disaster indicate that the CO_2 is of magmatic origin and the lake is chemically stratified. We revisited the lake in December 1988. Our bottom sounding study revised the bathymetry by Hassert (1912). The conductivity-temperature-depth profiller (CTD) measurements and chemical analysis of the lake water revealed that temperature, total dissolved solids (TDS) and CO_2 content of water below 160 m increased considerably over the last 25 months. This supports the view that CO_2 is being supplied to the lake bottom in the form of warm, CO_2-charged, mineralized water. Fluxes of heat and CO_2 were estimated to be 0.36 MW and 515-560x10^6 mol/y, respectively. The CO_2 flux is consistent with that estimated from the He-T relationship. The CO_2 flux is large enough to saturate the lake's hypolimnion within 50 y. Using the CO_2-TDS-Si relationship and temperature dependence of amorphous silica solubility, chemical composition of the warm mineralized water was estimated. Existence of a CO_2-saturated fluid below the sedimentary cover is suggested. These are the important findings for disaster prevention.
1986年8月21日,喀麦隆尼奥斯湖溶解的大量二氧化碳爆发,造成1700多人死亡。气灾后不久进行的测量表明,CO_2为岩浆成因,湖泊呈化学分层。1988年12月,我们再次参观了这个湖。我们的海底测深研究修订了Hassert(1912)的测深法。湖水电导率-温度-深度剖面仪(CTD)测量和化学分析表明,近25个月来,160 m以下湖水的温度、总溶解固形物(TDS)和CO_2含量显著升高。这支持了这样一种观点,即CO_2正以温暖的、充满CO_2的矿化水的形式被供应到湖底。热通量和CO_2通量估计分别为0.36 MW和515-560x10^6 mol/y。CO_2通量与He-T关系的估算结果一致。CO_2通量大到足以在50 y内饱和湖泊的低磷离子。利用CO_2- tds - si关系和无定形二氧化硅溶解度的温度依赖性,估计了暖矿化水的化学成分。沉积盖层下存在co_2饱和流体。这些都是预防灾害的重要发现。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Sato,M.Kusakabe,J.Hirabayashi,T.Njine,Y.Sano,Y.Nojiri,H.Shinohara and F.Tchoua: "A bottom sounding study of Lake Nyos and Lake Bambuluwe,NW Cameroon." Submitted to Bulletin of Volcanology. (1990)
H.Sato、M.Kusakabe、J.Hirabayashi、T.Njine、Y.Sano、Y.Nojiri、H.Shinohara 和 F.Tchoua:“喀麦隆西北部 Nyos 湖和 Bambuluwe 湖的海底探测研究。”
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- 影响因子:0
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Y. Sano, M. Kusakabe, J. Hirabayashi, Y. Nojiri, H. Shinohara, T. Njine and G. Tanyileke: "Helium and carbon fluxes in Lake Nyos, Cameroon: constraint on next lethal gas burst" Submitted to Earth and Planetary Science Letters. (1990)
Y. Sano、M. Kusakabe、J. Hirabayashi、Y. Nojiri、H. Shinohara、T. Njine 和 G. Tanyileke:“喀麦隆尼奥斯湖中的氦气和碳通量:对下一次致命气体爆发的限制”提交给地球和
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KUSAKABE Minoru其他文献
Groundwater oxygen anomaly related to the 2016 Kumamoto earthquake in Southwest Japan
与2016年日本西南部熊本地震有关的地下水氧异常
- DOI:
10.2183/pjab.96.024 - 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
SANO Yuji;ONDA Satoki;KAGOSHIMA Takanori;MIYAJIMA Toshihiro;TAKAHATA Naoto;SHIBATA Tomo;NAKAGAWA Chika;ONOUE Tetsuji;KIM Nak Kyu;LEE Hyunwoo;KUSAKABE Minoru;PINTI Daniele L. - 通讯作者:
PINTI Daniele L.
音響データハイディングを用いた防災放送システムに関する研究プロジェクト
利用声音数据隐藏的防灾广播系统研究项目
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
SANO Yuji;ONDA Satoki;KAGOSHIMA Takanori;MIYAJIMA Toshihiro;TAKAHATA Naoto;SHIBATA Tomo;NAKAGAWA Chika;ONOUE Tetsuji;KIM Nak Kyu;LEE Hyunwoo;KUSAKABE Minoru;PINTI Daniele L.;小嶋徹也,池口恭司,先村律雄,木村清和,井上和真 - 通讯作者:
小嶋徹也,池口恭司,先村律雄,木村清和,井上和真
KUSAKABE Minoru的其他文献
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{{ truncateString('KUSAKABE Minoru', 18)}}的其他基金
Lake Nyos in dual agony-An assessment of the limnic eruption and dam collapse-
尼奥斯湖的双重痛苦-湖沼喷发和大坝倒塌的评估-
- 批准号:
16403012 - 财政年份:2004
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
A study of the early solar system through systematic analysis of Antarctic meteorites
通过对南极陨石的系统分析研究早期太阳系
- 批准号:
14340172 - 财政年份:2002
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Continuous monitoring of water chemistry of Lake Nyos using an automated CDT and satellite data
使用自动 CDT 和卫星数据连续监测尼奥斯湖的水化学
- 批准号:
13573013 - 财政年份:2001
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
ARE MAGMAS BENEATH THE CAMEROON VOLCANIC LINE ENRICHED IN CARBON DIOXIDE? -RELATIONSHIP WITH THE LAKE NYOS-TYPE GAS DISASTERS-
喀麦隆火山线下方的岩浆富含二氧化碳吗?
- 批准号:
10041121 - 财政年份:1998
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Magma degassing processes in view of hydrogen isotopic variations
鉴于氢同位素变化的岩浆脱气过程
- 批准号:
08454166 - 财政年份:1996
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Experimental Study of Magma Degassing Processes
岩浆脱气过程的实验研究
- 批准号:
06403003 - 财政年份:1994
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for General Scientific Research (A)
Geochemical study of CO_2 build-up in Lake Nyos, Cameroon
喀麦隆尼奥斯湖CO_2积累的地球化学研究
- 批准号:
04041074 - 财政年份:1992
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for international Scientific Research
Determination of volatiles in magma by micro-gas-analysis of melt inclutions in phenocrysts
斑晶中熔体包裹体的微量气体分析测定岩浆中的挥发物
- 批准号:
63470031 - 财政年份:1988
- 资助金额:
$ 6.14万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
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