| DOI: | 10.1016/j.gloplacha.2014.08.014
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| 论文题名: | Record of methane emissions from the West Svalbard continental margin during the last 23.500yrs revealed by δ13C of benthic foraminifera |
| 作者: | Panieri G.; James R.H.; Camerlenghi A.; Westbrook G.K.; Consolaro C.; Cacho I.; Cesari V.; Cervera C.S.
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| ISSN: | 0921-8494
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| 出版年: | 2014
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| 卷: | 122 | | 起始页码: | 151
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| 结束页码: | 160
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| 语种: | 英语
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| 英文关键词: | Benthic foraminifera
; Methane emission
; Stable isotope
; Vestnesa ridge
; West svalbard
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| Scopus关键词: | Biomineralization
; Gas emissions
; Hydration
; Isotopes
; Methane
; Stratigraphy
; Benthic foraminifera
; Methane emissions
; Stable isotopes
; Svalbard
; Vestnesa ridge
; Vestnesa Ridge
; Gas hydrates
; benthic foraminifera
; biomineralization
; carbon emission
; continental margin
; Last Glacial Maximum
; marine sediment
; methane
; seafloor
; sediment core
; biostratigraphy
; carbon isotope
; chronostratigraphy
; gas hydrate
; Holocene
; paleoclimate
; stable isotope
; Arctic
; Svalbard
; Svalbard and Jan Mayen
; Foraminifera
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| 英文摘要: | The values of δ13C in benthic foraminifera have been measured in a gas-hydrate-bearing sediment core collected from an area of active methane venting on the Vestnesa Ridge (West Svalbard continental margin) to reconstruct the local history of methane emissions over the past 23.500yrs BP. The chronostratigraphic framework of the core has been derived from AMS 14C dates and biostratigraphic analysis. While foraminifera from some intervals have δ13C within the normal marine range (0 to -1‰), five intervals are characterized by a much lower δ13C, as low as -17.4‰. These intervals are interpreted to record the incorporation of 13C-depleted carbon in the presence of methane emissions at the seafloor during biomineralization of the carbonate foraminiferal tests and subsequent secondary mineralization. Methane emission events (MEE) occur from the Last Glacial Maximum (LGM) to the Holocene, with the most prominent one, in terms of δ13C depletion, predating the Bølling-Allerød Interstadial (GI-1 in the Greenland ice core record). The lack of correlation between the values of δ13C and δ18O, however, appears to preclude warming of bottom waters as the principal control on methane release. Rather, it seems likely that methane release is a consequence of episodicity in the supply of gas to the hydrate system and in the processes that enable methane gas to migrate through the hydrate stability field to the seabed, or of other geological processes still under debate. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906826750&doi=10.1016%2fj.gloplacha.2014.08.014&partnerID=40&md5=24c1451888a7c311bbd178ce332b5fa1
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11400
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway, Dramsveien 201, N-9037 Tromsø, Norway
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| Recommended Citation: | |
Panieri G.,James R.H.,Camerlenghi A.,et al. Record of methane emissions from the West Svalbard continental margin during the last 23.500yrs revealed by δ13C of benthic foraminifera[J],2014-01-01,122.
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