Geochemical peculiarities of the carbonate constructions formed during microbial oxidation of methane under anaerobic conditions

被引：30

作者：

Lein, AY

Ivanov, MV

Pimenov, NV

Gulin, MB

机构：

[1] Russian Acad Sci, PP Shirshov Oceanol Inst, Moscow 117851, Russia

[2] Russian Acad Sci, Inst Microbiol, Moscow 117312, Russia

[3] Natl Acad Sci Ukraine, Inst Biol So Seas, Sevastopol, Ukraine

来源：

MICROBIOLOGY | 2002年 / 71卷 / 01期

关键词：

carbonate constructions; isotopic composition anaerobic methane oxidation;

D O I：

10.1023/A:1017906501726

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

The aragonite constructions of the Black Sea are formed in a stable anaerobic zone and are a perfect object to study the natural mechanism of anaerobic methane oxidation. The most probable pathway of methane oxidation is its methanogen-mediated reaction with bicarbonates, dissolved in seawater, with the formation of water and acetate, which is then consumed by other components of the anaerobic community. Comparison of the delta(13)C values of carbonate minerals and organic matter once more demonstrated that the formation of the organic matter of biomass is accompanied by intense fractionation of carbon isotopes, as a result of which the total organic matter of biomass acquires an extremely light isotopic composition, characterized by delta(13)C values as low as -83.8parts per thousand.

引用

页码：78 / 90

页数：13

共 28 条

[21] Highly isotopically depleted isoprenoids: Molecular markers for ancient methane venting [J].