Gas hydrate accumulation in the subsurface sediments of Lake Baikal (Eastern Siberia)

Matveeva, T.; Mazurenko, L.; Soloviev, V. A.; Klerkx, J.; Kaulio, V. V.; Prasolov, E. M.

doi:10.1007/s00367-003-0144-z

Cited by 43 publications

(12 citation statements)

References 18 publications

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“…Numerous sources of methane seeps including deep-sea marine margins where methane hydrates occur (Valentine 2002;Valentine and Reeburgh 2000) and terrestrial thermokarst lakes (Anthony et al 2010;Isaksen et al 2011;Matveeva et al 2003) are known to exist and have been described in both Arctic and sub-Arctic regions, however, the microbial communities have rarely been explored. Our initial microbial characterization of LH spring sediments revealed a novel low diversity, low biomass microbial community capable of metabolic activity at in situ subzero, saline conditions.…”

Section: Introductionmentioning

confidence: 99%

Microbial diversity and activity in hypersaline high Arctic spring channels

et al. 2012

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Lost Hammer (LH) spring is a unique hypersaline, subzero, perennial high Arctic spring arising through thick permafrost. In the present study, the microbial and geochemical characteristics of the LH outflow channels, which remain unfrozen at C-18°C and are more aerobic/ less reducing than the spring source were examined and compared to the previously characterized spring source environment. LH channel sediments contained greater microbial biomass (*100-fold) and greater microbial diversity reflected by the 16S rRNA clone libraries. Phylotypes related to methanogenesis, methanotrophy, sulfur reduction and oxidation were detected in the bacterial clone libraries while the archaeal community was dominated by phylotypes most closely related to THE ammonia-oxidizing Thaumarchaeota. The cumulative percent recovery of 14 Cacetate mineralization in channel sediment microcosms exceeded *30% and *10% at 5 and -5°C, respectively, but sharply decreased at -10°C( B1%). Most bacterial isolates (Marinobacter, Planococcus, and Nesterenkonia spp.) were psychrotrophic, halotolerant, and capable of growth at -5°C. Overall, the hypersaline, subzero LH spring channel has higher microbial diversity and activity than the source, and supports a variety of niches reflecting the more dynamic and heterogeneous channel environment.

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Section: Introductionmentioning

confidence: 99%

Microbial diversity and activity in hypersaline high Arctic spring channels

et al. 2012

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“…Because of this, the structures (which were then named Bol'shoi , Malen'kii , Malyutka , and Staryi ) were classed as seeps [6]. In March of 2000, the first bottom methane hydrates were separated from the surface sediments of seep Malen'kii [6][7][8][9]. The occurrence of Pliocene diatoms in Holocene sediments from this structure suggests that they were brought to the surface together with methane fluid from depths of >300 m [8].…”

Section: Introductionmentioning

confidence: 99%

Crystallization of authigenic carbonates in mud volcanoes at Lake Baikal

et al. 2008

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-This paper presents data on authigenic siderite first found in surface sediments from mud volcanoes in the Central (K-2) and Southern (Malen'kii) basins of Lake Baikal. Ca is the predominant cation, which substitutes Fe in the crystalline lattice of siderite. The enrichment of the carbonates in the 13 ë isotope (from +3.3 to +6.8‰ for the Malen'kii volcano and from +17.7 to +21.9‰ for K-2) results from the crystallization of the carbonates during methane generation via the bacterial destruction of organic matter (acetate). The overall depletion of the carbonates in 18 O is mainly inherited from the isotopic composition of Baikal water.

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“…Coarse-grained sediments such as gravels or breccias generally contain sheets or massive hydrates, while sand, silt and ash generally contain hydrate in the form of cement (Clennell et al, 1999;Harrison and Curiale, 1982;Milkov et al, 2004b;Shipboard Scientific Party (leg 67), 1982;Shipboard Scientific Party (leg 66), 1982a, b, c;von Huene et al, 1982). Fractured bedrock and impermeable sediments such as mud and clay often contain hydrate nodules, layers, and fracture-and vein-infillings (Brooks et al, 1991(Brooks et al, , 1994Clennell et al, 1999;Ginsburg et al, 1993Ginsburg et al, , 1999Kvenvolden and McDonald, 1985;Mathews and von Huene, 1984;Matveeva et al, 2003;Milkov et al, 2004b;Sassen et al, 2004;Shipboard Scientific Party, 1982). The formation of these specific habits is due to hydrate formation either in large pore spaces, existing fractures in bedrock, or through the creation of new fractures in impermeable sediments when pore fluid (liquid and gas) pressure below exceeds the strength of the sediment above, effectively venting the gas and liquid pressure from below (Flemings et al, 2003).…”

Section: Field Observationsmentioning

confidence: 98%