Application of methane clumped isotope approach in natural abiotic methane reservoirs

甲烷团簇同位素方法在天然非生物甲烷储层中的应用

• 批准号: 22K14134
• 负责人: 張 乃忠
• 金额: $ 2.83万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K14134/
• 关键词: Biodegradation; Abiotic methane; Mud volcano; Clumped isotope; methane; clumped isotope; mud volcano; serpentinization

To better constrain the origins of natural hydrocarbon gases, we have applied the novel analytical technique, i.e., methane clumped isotope approach, in different types of mud volcanos across the Japanese archipelago. We have conducted multiple field trips to collected emitted gases from mud volcanos and/or surface seeps in (1) Tokamachi area (Gamo, Murono and Kusozu), and (2) Goshogake area.By combination of methane clumped isotope analysis and other geochemical approaches, such as bulk carbon isotope compositions and concentrations of alkanes and CO2, position specific isotope analysis of propane, we have successfully constrained the contribution of microbial activity (biodegradation process) in Tokamachi-type mud volcanos. The progresses have been presented at EGU2023 conference and will be submitted to an international journal soon.In the coming year, we will mainly focus on its application in Goshogake-type mud volcanos, in which hydrocarbons have been assumed as considerately contributed from abiotic source.

为了更好地限制天然烃类气体的来源，我们应用了新的分析技术，即，甲烷聚集同位素的方法，在不同类型的泥火山在日本列岛。我们进行了多次实地考察，收集了（1）十日町地区泥火山和/或地表渗漏的排放气体（2）Goshogake地区。通过甲烷团簇同位素分析和其他地球化学方法的结合，如烷烃和CO2的体碳同位素组成和浓度，丙烷的位置特异性同位素分析，我们已经成功地限制了微生物活动（生物降解过程）在十日町型泥火山的贡献。该研究成果已在EGU 2023会议上发表，并即将提交国际期刊。明年，我们将重点关注其在五所岳型泥火山中的应用，其中碳氢化合物被认为是非生物来源的贡献。

项目成果

Understanding the sources and sinks of methane using paired clumped isotope approach

使用成对簇同位素方法了解甲烷的来源和汇

• 发表时间: 2022
• 作者: 張 乃忠;関根康人;中川 麻悠子;ジルベルト アレキシー;松本 良;吉田 尚弘
• 通讯作者: 吉田 尚弘

Microbial activity at different types of mud volcanos in Japan: an insight from methane clumped isotope signatures

日本不同类型泥火山的微生物活动：来自甲烷聚集同位素特征的见解

• 发表时间: 2022
• 作者: Naizhong Zhang;Alexis Gilbert;Mayuko Nakagawa;Koudai Taguchi;Keita Yamada
• 通讯作者: Keita Yamada

Abiotic methane formation in nature: information from clumped isotope analysis of laboratory synthesized methane

自然界中非生物甲烷的形成：实验室合成甲烷的簇同位素分析信息

• 发表时间: 2022
• 作者: Naizhong Zhang;Yasuhito Sekine;Keita Yamada;Alexis Gilbert;Mayuko Nakagawa and Naohiro Yoshida
• 通讯作者: Mayuko Nakagawa and Naohiro Yoshida

Methane clumped isotope signatures and microbial activity: a case study from two mud volcanos in central Japan

甲烷聚集同位素特征和微生物活动：日本中部两座泥火山的案例研究

• 发表时间: 2022
• 作者: Naizhong Zhang;Alexis Gilbert;Mayuko Nakagawa;Koudai Taguchi and Keita Yamada
• 通讯作者: Koudai Taguchi and Keita Yamada