Quantitative analytical method for methane hydrates in marine sediments

海洋沉积物中甲烷水合物的定量分析方法

• 批准号: 15550060
• 负责人: MINAMI Hirotsugu
• 金额: $ 2.43万
• 依托单位: Kitami Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550060/
• 关键词: Methane Hydrates; Marine Sediments; Sakhalin; Pore Water; オホーツク海

The CHAOS (hydro-Carbon Hydrate Accumulations in the Okhotsk Sea) cooperative project organized by Kitami Institute of Technology (KIT, Japan), All Russia Research Institute for Geology and Mineral Resources of the Ocean (Russia), V.I.Il'ichev Pacific Oceanological Institute FEB RAS (Russia), Limnological Institute SB RAS (Russia), Leibniz Institute of Marine Sciences at Kiel University (Germany), Renard center of Marine Geology, Ghent University (Belgium) and Korea Polar Research Institute (Korea)with the aim of the natural gas hydrate study at the Okhotsk Sea was conducted in 2003. The core sampling areas were located offshore Sakhalin Island. The gas hydrate-bearing and gas hydrate-free marine sediments were retrieved from the bottom of the Okhotsk Sea at water depths between 830 and 960 m by using gravity and hydro-corers.The pore water samples were obtained by a squeezer designed and constructed at KIT. Determination of ions such as sulfate, sodium etc. in the pore water was carried out by ion chromatography (sulfate and chloride), inductively coupled plasma atomic emission spectrometry (sodium and magnesium) and flame atomic absorption spectrometry (potassium and calcium).It was found that the sulfate concentration decreased rapidly with depth to ca. 1 mM at about 0.4 mbsf for the gas hydrate-bearing sediments whereas the depth was about 3 mbsf for the sediments without gas hydrate. Since sulfate concentration decreases due to chemical reactions with upwelling methane, sulfate content profile below sea floor can provide information about upwelling methane flux and methane hydrates formation activity.

混沌（鄂霍次克海碳氢化合物的积累）合作项目，北见工业大学举办（日本，KIT）、全俄海洋地质和矿产资源研究所（俄罗斯）、V.I.Il'ichev太平洋海洋学研究所FEB RAS（俄罗斯）、湖沼学研究所SB RAS（俄罗斯）、基尔大学莱布尼茨海洋科学研究所（德国）、雷纳德海洋地质中心、根特大学（比利时）和韩国极地研究所（韩国）于2003年在鄂霍次克海进行了天然气水合物研究。岩芯取样区位于库页岛近海。利用重力取样器和水力取样器在鄂霍次克海830 ~ 960 m水深的海底采集了含天然气水合物和不含天然气水合物的海洋沉积物样品，孔隙水样品由KIT设计和建造的挤压器采集。采用离子色谱法（硫酸根和氯离子）、电感耦合等离子体原子发射光谱法（钠和镁离子）和火焰原子吸收光谱法（钾和钙离子）对孔隙水中的硫酸根、钠等离子进行了测定。对于含气体水合物的沉积物，在约0.4mbsf下的深度为约1 mM，而对于不含气体水合物的沉积物，深度为约3 mbsf。由于硫酸盐浓度由于与上涌甲烷的化学反应而降低，因此海底以下的硫酸盐含量剖面可以提供关于上涌甲烷通量和甲烷水合物形成活动的信息。

项目成果

Minami, H.: "Simultaneous Direct Determination of Aluminum, Calcium and Iron in Silicon Carbide and Silicon Nitride Powders by Slurry-Sampling Graphite Furnace AAS"Analytical Sciences. 20. 455-459 (2004)

Minami, H.：“通过浆料取样石墨炉原子吸收光谱法同时直接测定碳化硅和氮化硅粉末中的铝、钙和铁”分析科学。

The CHAOS Project for the Natural Gas Hydrate Sampling Operation and Chemical Core Analysis at the Okhotsk Sea.

鄂霍次克海天然气水合物取样作业和化学岩心分析的 CHAOS 项目。

• 发表时间: 2004
• 期刊: Proceedings of the International Workshop on Modern Science and Technology
• 作者: H.Minami;H.Sakagami;A.Hachikubo;other 7 authors
• 通讯作者: other 7 authors

The CHAOS Project for the Natural Gas Hydrate Sampling Operation and Chemical Core Analysis at the Okhotsk Sea

鄂霍次克海天然气水合物取样及化学岩心分析CHAOS项目

• 发表时间: 2004
• 期刊: Proceedings of the International Workshop on Modern Science and Technology
• 作者: H.Minami;H.Sakagami;A.Hachikubo;他7名
• 通讯作者: 他7名

Hydrate-bearing structures in the Sea of Okhotsk

• DOI: 10.1029/2005eo020001
• 发表时间: 2005-01
• 期刊: Eos, Transactions American Geophysical Union
• 作者: H. Shoji;H. Minami;A. Hachikubo;H. Sakagami;K. Hyakutake;V. Soloviev;T. Matveeva;L. Mazurenko;V. Kaulio;Vyacheslav Gladysch;E. Logvina;A. Obzhirov;B. Baranov;O. Khlystov;N. Biebow;J. Poort;Y. Jin;Yeadong Kim

CP-MAS ^<13>C-NMR Study on the Crystallographic Structure of the Natural Gas Hydrate in the Bottom of the Okhotsk Sea and Lake Baikal

鄂霍次克海和贝加尔湖底部天然气水合物晶体结构的CP-MAS^13C-NMR研究

• 发表时间: 2003
• 期刊: Proceedings of the 10th International Symposium on Polar Sciences - Recent Approaches in Polar Earth Science
• 作者: M.Kida;H.Sakagami;H.Minami;他16名
• 通讯作者: 他16名