Himalayan uplift impacts on methane flares

喜马拉雅隆起对甲烷耀斑的影响

• 批准号: 15F15029
• 负责人: 川幡 穂高
• 金额: $ 1.47万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2015
• 资助国家: 日本
• 起止时间: 2015-10-09 至 2018-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15F15029/
• 关键词: organic carbon; organic matter; total nitrogen; shrubs; woody plants; herbaceous plants; バングラデシュ; ヒマラヤ; 風化; 河川; 堆積物; 土壌; 有機物; 無機分析; 有機分析

Sediments from the Bay of Bengal were measured for elemental, n-alkanes, and stable carbon (δ13C) and nitrogen (δ15Ntot) isotopic compositions to examine the gas hydrate reservoir systems in the oceanic region. The TOC, C/N ratio and isotopic compositions of the studied sediments suggest a mixture of marine and terrestrial derived organic matter. The negative δ13C values also indicate gas hydrate deposits of microbial methane dominant. Sediment accumulation rate and TOC are likely controlled by high crustal materials input in response to uplift of the Himalaya.

测定了孟加拉湾沉积物中元素、正构烷烃、稳定碳(δ13C)和氮(δ15Ntot)的同位素组成，以研究大洋区天然气水合物成藏系统。所研究沉积物的有机碳、碳/氮比和同位素组成表明，它们是海相和陆源有机质的混合体。负δ~(13)C值也表明天然气水合物沉积以微生物甲烷为主。沉积物堆积速率和有机碳可能受喜马拉雅隆升时高地壳物质输入的控制。

项目成果

Spatial and Seasonal Variation in Surface Water pCO2 in the Ganges, Brahmaputra, and Meghna Rivers on the Indian Subcontinent

• DOI: 10.1007/s10498-015-9262-2
• 发表时间: 2015-05
• 期刊: Aquatic Geochemistry
• 影响因子: 1.6
• 作者: Takuya Manaka;H. Ushie;D. Araoka;Souya Otani;A. Inamura;A. Suzuki;H. Zakir Hossain;H. Kawahata

Geochemical characteristics of organic matter in the Andaman Sea sediments: Implications for source, paleovegetation and paleoclimate changes

安达曼海沉积物中有机质的地球化学特征：对来源、古植被和古气候变化的影响

• 发表时间: 2016
• 作者: Hossain H. M.;川幡 穂高;Roser Barry;三瓶 良和;眞中 卓也;大谷 壮矢;Zakir Hossain and Hodaka Kawahata
• 通讯作者: Zakir Hossain and Hodaka Kawahata

Geochemical characteristics of modern river sediments in Myanmar and Thailand: Implications for provenance and weathering

• DOI: 10.1016/j.chemer.2017.07.005
• 发表时间: 2017-09
• 期刊: Chemie Der Erde-geochemistry
• 作者: H. Hossain;H. Kawahata;Barry P. Roser;Y. Sampei;Takuya Manaka;Souya Otani

Geochemical implications of provenance and chemical weathering in the major river sediments of Myanmar and Thailand

缅甸和泰国主要河流沉积物来源和化学风化的地球化学意义

• 发表时间: 2017
• 作者: Hossain H. M.;川幡 穂高;Roser Barry;三瓶 良和;眞中 卓也;大谷 壮矢
• 通讯作者: 大谷 壮矢