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根据泉(池)水中气体的组分和同位素组成,讨论了我国黑龙江省五大连池火山区气体的来源和运移。1997年8月从五大连池火山区泉(池)中采集了9个气、水样品,同年9月测定了游离气和水溶气的气体组分,氦同位素比值和二氧化碳的δ~(13)C值。气体以CO_2为主,多数样品的CO_2浓度大于80％。He和CH_4的浓度变比范围大,分别为(0.7～380)×10~(-6)和(4～180)×10~(-6)。~3He/~4He值分布在(1.05～3.2)Ra(Ra=1.4×10~(-6))。~4He/~(20)Ne值均大于大气中的值,分布在0.45～1011之间。CO_2的δ~(13)C值与地幔或岩浆CO_2的值一致,为-9.6％～-4.2％(PDB)。这些地球化学资料表明泉水为渗入地下的大
According to the composition and isotopic compositions of the gas in spring (pool), the origin and migration of gas in the Wudalianchi volcanic area in Heilongjiang Province of China are discussed. In August 1997, nine samples of gas and water were collected from the volcanic area of Wudalianchi volcano. In September of the same year, the gas composition, the ratio of helium isotope and the δ ~ (13) C value of carbon dioxide . The main gas is CO 2, most of the samples have a CO 2 concentration greater than 80%. The concentrations of He and CH_4 varied from 0.7 to 380 × 10 -6 and 4 to 180 × 10 -6, respectively. ~ 3He / ~ 4He values ranged from (1.05 ~ 3.2) Ra (Ra = 1.4 × 10 ~ (-6)). ~ 4He / ~ (20) Ne values are greater than the value of the atmosphere, distributed between 0.45 ~ 1011. The δ ~ (13) C value of CO_2 is consistent with the value of mantle or magma CO_2, which is -9.6% -4.2% (PDB). These geochemical data show that the spring water is infiltrated underground