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.

为了更好地确定天然烃气体的来源，我们在日本群岛不同类型的泥火山中应用了新的分析技术，即甲烷团块同位素方法。我们进行了多次实地考察，以收集(1)Tokamachi地区（Gamo， Murono和Kusozu）和(2)Goshogake地区的泥火山和/或地表渗出物排放的气体。结合甲烷团块同位素分析和其他地球化学方法，如碳同位素组成、烷烃和CO2的浓度、丙烷的位置特异性同位素分析，我们成功地限制了tokamachi型泥火山微生物活动（生物降解过程）的贡献。这一进展已经在EGU2023会议上发表，并将很快提交给一家国际期刊。在接下来的一年里，我们将重点研究其在goshogake型泥火山中的应用，这些泥火山的烃类被认为是非生物来源的。

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