论文部分内容阅读
对冲绳海槽Jade热液区块状硫化物中流体包裹体的氦、氖和氩同位素组成进行了测定,流体包裹体的~3He/~4He比值为(6.2～10.1)Ra,均值为7.8Ra,与大洋中脊玄武岩一致[~3He/~4He≈(6～11)Ra],~(20)Ne/~(22)Ne比值为10.7～11.3,明显高于大气值(9.8),而~(40)Ar/~(36)Ar比值的变化范围在287～334之间,接近大气值(295.5),这些结果表明,块状硫化物中热液流体捕获的稀有气体是地幔和海水源组分混合的产物,且流体包裹体中的氦主要来自地幔,氖和氩主要来自海水。
The isotopic compositions of helium, neon and argon in fluid inclusions in the Jade hydrothermal zone of the Okinawa Trough were measured. The ~ 3He / ~ 4He ratio of fluid inclusions was (6.2 ~ 10.1) Ra with an average of 7.8 Ra , Which is consistent with mid-oceanic basalts basalt [~ 3He / ~ 4He≈ (6 ~ 11) Ra], ~ (20) Ne / ~ (22) Ne, and is significantly higher than the atmospheric value (9.8) (40) The Ar / ~ (36) Ar ratios range from 287 to 334, close to the atmospheric value (295.5). These results show that the rare gases captured by the hydrothermal fluids in the massive sulphides are the mantle and the seawater source The mixed product, and the fluid inclusions helium mainly from the mantle, neon and argon mainly from seawater.