Integrated study of environmental impact of gas hydrate

天然气水合物环境影响综合研究

• 批准号: 16201002
• 负责人: MATSUMOTO Ryo
• 金额: $ 29.45万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16201002/
• 关键词: Gas hydrare; Methane plume; Pockmarks; Bacterial mat; Eastern margin of Japan Sea; Umitaka spur; BSRs; Shimokita peninsula; メタンハイドレート; メタンハイドレート・バブル; 日本海; 黒色頁岩; オルドビス-シルル紀境界事変; 化学合成生物; BSR; チンハイ湖; 大量絶滅; 富山湾; メタンプリューム; 硫酸還元; 熱分解起源; 氷期-

The main objective of this program is to make an assessment of the environmental impact of marine gas hydrates through the geological, geophysical, and marine biological approaches and integration of newly obtained data sets. The following are the summary and results of the 3 years program.1. We conducted hydrate-research cruises in the gas hydrate field off Naoetsu by "T/V Umitaka-maru" of Tokyo University of Marine Science and Technology and "Natsushima" and "Kaiyo" of JAMSTEC.2. We identified strong methane seep sites off Naoetsu in Japan Sea. Plumes of methane bubbles stand about 600 meter high on the sea floor of about 900 meter below sea level. The plumes were observed to supply significant amount of methane to shallow waters. The bottom and intermediate waters are very low, -0.2℃, which allows gas bubbles to form gas hydrate in the water masses. This is the main reason why the plumes reach up to shallow waters.3. Submersible dives by "Hyper dolphin" found gas hydrate exposed on the sea floor for the first time around Japan islands. This finding suggests strong methane fluxes in the study area.4. Probably because of low temperatures, benthic communities are relatively simple and monotonous, but characterized by chemosynthetic communities and bacterial mats. Crabs ("Beni-zuwai-gani") are extremely abundant on and near the methane seep sites.5. Large pockmarks, approximately 500 m in diameter, develop on the Umitaka spur where methane seeps and gas hydrate were observed. The pockmarks are inactive, partly buried by mud, implying that extremely violent methane seeps occurred in the past.6. We also conducted gas hydrate cruise off Shimokita peninsula, northwestern Pacific by "Tansei-maru" of JAMSTEC. We could not identify methane seeps or plumes but strong and unusual BSRs seem to indicate development of subsurface gas hydrate and methane generation.

该计划的主要目标是通过地质、地球物理和海洋生物方法以及整合新获得的数据集来评估海洋天然气水合物的环境影响，以下是该计划三年的总结和结果。 1. 东京海洋大学的“T/V Umitaka-maru”号和JAMSTEC的“Natsushima”号和“Kaiyo”号在直江津附近的天然气水合物田进行了水合物研究巡航。2．在日本海直江津附近发现了强烈的甲烷渗漏点，在海平面以下约 900 米的海底发现了约 600 米高的甲烷气泡，这些甲烷气泡向浅水区和中层提供了大量的甲烷。水温很低，为-0.2℃，这使得气泡在水团中形成气体水合物，这是羽流到达浅水区的主要原因。 3． “超级海豚”首次在日本列岛附近的海底发现了天然气水合物，这一发现表明研究区域存在较强的甲烷通量。 4．化学合成群落和细菌垫（“Beni-zuwai-gani”）在甲烷渗漏点及其附近极为丰富。5。直径，在 Umitaka 支线上发育，观察到了甲烷渗漏和天然气水合物。麻点不活动，部分被泥土掩埋，这意味着过去曾发生过极其剧烈的甲烷渗漏。6。我们还在西北部的下北半岛进行了天然气水合物巡航。太平洋 JAMSTEC 的“Tansei-maru” 我们无法识别甲烷渗漏或羽流，但强烈且不寻常的 BSR 似乎表明地下天然气水合物的发育。甲烷的产生。

项目成果

Evolution of a gas hydrate system as precorded by oxygen and hydrogen isotopes of the interstitial waters of the JAPEX

由 JAPEX 间隙水的氧和氢同位素记录的天然气水合物系统的演化

• 发表时间: 2005
• 期刊: JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well. G.S.C. Bull. 585
• 作者: Tomaru;H.;Matsumoto;R.;Chen;Y.;Lu;H.;and Clark;I.D.
• 通讯作者: I.D.

Methane seeps and Methane hydrate : Example from off Naoetsu in Japan Sea

甲烷渗漏和甲烷水合物：日本海直江津附近的例子

• 发表时间: 2005
• 期刊: Earth Monthly no. 318
• 作者: Kumamoto;T.;Hamada;Y.;仁科 健;R. Matsumoto
• 通讯作者: R. Matsumoto

Geochemistry of the Interstitial waters of th JAPEX

JAPEX 间隙水的地球化学

• 发表时间: 2005
• 期刊: JNOC/GSC, et. al. Mallik 5L-38 gas hydrate production research well. G. S. C. Bull. 585
• 作者: Matsumoto;R.;Tomaru;H.;Chen;Y.;Lu;H.;Clark;I. D.
• 通讯作者: I. D.

Search for methane hydrate in Japan Sea

在日本海寻找甲烷水合物

• 发表时间: 2005
• 期刊: Ships&Ocean Newsletter 131
• 作者: 木内 虹平;李 恩兒;原田 和弘;高泉 佳苗;中村 好男;藤田利治;R. Matsumoto
• 通讯作者: R. Matsumoto

メタンシープとメタンハイドレート:日本海・直江津沖の例-総論-

甲烷羊和甲烷水合物：来自日本海和直江津海岸的示例 - 总体概述 -

• 发表时间: 2005
• 期刊: 月刊地球 318号
• 作者: 大城直人;猿渡康文;神田 嘉延;松本 良
• 通讯作者: 松本 良