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DOI | 10.1002/2017GL075848 |
Glacial Cycles Influence Marine Methane Hydrate Formation | |
Malinverno, A.1; Cook, A. E.2; Daigle, H.3; Oryan, B.1 | |
2018-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:2页码:724-732 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Methane hydrates in fine-grained continental slope sediments often occupy isolated depth intervals surrounded by hydrate-free sediments. As they are not connected to deep gas sources, these hydrate deposits have been interpreted as sourced by in situ microbial methane. We investigate here the hypothesis that these isolated hydrate accumulations form preferentially in sediments deposited during Pleistocene glacial lowstands that contain relatively large amounts of labile particulate organic carbon, leading to enhanced microbial methanogenesis. To test this hypothesis, we apply an advection-diffusion-reaction model with a time-dependent organic carbon deposition controlled by glacioeustatic sea level variations. In the model, hydrate forms in sediments with greater organic carbon content deposited during the penultimate glacial cycle (similar to 120-240 ka). The model predictions match hydrate-bearing intervals detected in three sites drilled on the northern Gulf of Mexico continental slope, supporting the hypothesis of hydrate formation driven by enhanced organic carbon burial during glacial lowstands. Plain Language Summary Natural methane hydrates, ice-like compounds of water and methane, are widespread in continental margin sediments. We show here evidence for the hypothesis that methane hydrates form preferentially in sediments deposited during glacial periods, which contain more organic matter that is converted to methane by microbes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425514300028 |
WOS关键词 | SEDIMENTARY ORGANIC-MATTER ; SEA-DRILLING-PROJECT ; GAS-HYDRATE ; ELECTRICAL ANISOTROPY ; GREEN CANYON ; CARBON ; OXIDATION ; RESERVOIRS ; BASIN ; MINERALIZATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26872 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 2.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA; 3.Univ Texas Austin, Dept Petr & Geosyst Engn, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Malinverno, A.,Cook, A. E.,Daigle, H.,et al. Glacial Cycles Influence Marine Methane Hydrate Formation[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):724-732. |
APA | Malinverno, A.,Cook, A. E.,Daigle, H.,&Oryan, B..(2018).Glacial Cycles Influence Marine Methane Hydrate Formation.GEOPHYSICAL RESEARCH LETTERS,45(2),724-732. |
MLA | Malinverno, A.,et al."Glacial Cycles Influence Marine Methane Hydrate Formation".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):724-732. |
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