Cryogenesis as a factor of methane distribution in layers of permafrost
Cryogenesis as a factor of methane distribution in layers of permafrost
复制标题
低温成因是永久冻土层中甲烷分布的一个因素
作者：
G. Kraev;E. Schultze;E. Rivkina
科雷马低地的天然气渗漏与永久冻土中的甲烷包裹体有关。这些包裹体是由甲烷饱和矿床的表生冻结挤压而成。甲烷的生物成因、同位素数据以及天然气渗漏中甲烷的放射性碳年龄低于宿主矿床的放射性碳年龄证明了这一点。冻土带甲烷分布的实验数据和观测结果表明，冻土带地层中甲烷的分布是冻岩形成过程中甲烷运移的结果。甲烷在沉积物中的分布规律和甲烷包裹体的形成可能会改变冻土退化后温室气体向大气排放的性质和量的观念。
The gas seeps in Kolyma lowland are associated with methane inclusions in permafrost. These inclusions are formed by methane squeezed by epigenetic freezing of methane saturated deposits. This is proved by the biological genesis of the methane, by the isotopic data and the lower radiocarbon age of the methane from the gas seep in comparison with the radiocarbon age of the host deposits. The experimental data and observations of methane distribution in permafrost indicate that the methane distribution in the stratum of frozen deposits is a result of methane migration during cryolithogenesis. The regularities of methane distribution in the deposits and formation of methane inclusions may change the idea of the character and volumes of emission of greenhouse gases into the atmosphere upon degradation of permafrost.