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昆仑山垭口多年冻土区钻孔气体组分分析

Keywords: 昆仑山垭口,气体组分,多年冻土区

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Abstract:

?昆仑山垭口多年冻土区2个钻孔的气体组分和同位素数据显示,钻孔气体中烃类气体以ch4为主,含微量的c2h6、c3h8和c4h10.钻孔-1泥浆气体的c1/(c2+c3)值介于163~1642之间;钻孔-2岩心和泥浆气体主要为ch4气体组分,未检出c2h6等气体组分,同时δ13cch4<-60‰,属于微生物成因气。2个钻孔的co2含量低于15%,而且δ13cco2值介于-26.8‰~-20‰之间,小于-10‰,说明其为有机成因气。

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