对大西洋中脊ＴＡＧ（Ｔｒａｎｓ－Ａｔｌａｎｔｉｃ Ｇｅｏｔｒａｖｅｒｓｅ）热液区硫化物中流体包裹体的 Ｈｅ， Ｎｅ和 Ａｒ同位素组成进行了测定，流体包裹体的~3Ｈｅ／~4Ｈｅ比值为 ２．２～１３．３ Ｒａ，均值 为７．２Ｒａ，与该区喷口热液流体（~３Ｈｅ／~４Ｈｅ＝７．５～８．２Ｒａ）和ＭＯＲＢ（~３Ｈｅ／~４Ｈｅ＝６～１１Ｒａ）相比， 其变化范围明显较大．~（２０）Ｎｅ／~（２２）Ｎｅ比值为 １０．２～１１．４，明显高于大气值（９．８）．而~（４０）Ａｒ／~（３６）Ａｒ比 值的变化范围从２８７到 ３５９，接近大气值（２９５．５）．这些结果表明，热液硫化物中流体包 裹体的稀有气体是地幔和海水端员混合的产物，热液流体捕获的地慢源稀有气体中有 部分可能来自下地幔，且流体包裹体中的Ｈｅ主要来自上地慢，Ｎｅ和Ａｒ主要来自海水． The He, Ne and Ar isotopic compositions of fluid inclusions in the hydrothermal sulfide zone of the Trans-Atlantic Geotraverse (TAG) of the mid-Atlantic ridge were determined. The ~ 3He / ~ 4He ratios of fluid inclusions ranged from 2.2 to 13.3 Ra, with a mean value of 7.2 Ra. Compared with the hydrothermal fluids (~ 3He / ~ 4He = 7.5 ~ 8.2Ra) and MORB (~ 3He / ~ 4He = 6 ~ 11Ra) Larger. The Ne ~ ~ (22) Ne ratio of ~ (20) is 10.2 ~ 11.4, which is obviously higher than the atmospheric value (9.8). The ~ (40) Ar / ~ (36) Ar ratio varied from 287 to 359, which was close to the atmospheric value (295.5). These results indicate that the rare gas of fluid inclusions in hydrothermal sulphide is the product of the mixing of the mantle and the seawater end-member. Some of the slow-source rare gas captured by hydrothermal fluids may come from the lower mantle, and the He Mainly from the slow, Ne and Ar are mainly from the sea.