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大别—苏鲁地区榴辉岩的~3He/~4He比值大部分位于0.056～0.67 Ra之间,在~3He-~4He图上位于陆壳氦与地幔氦的混合部位。碧溪岭榴辉岩的~3He/~4He比值相对较高,为5.6Ra,具幔源岩石的特点。榴辉岩的~3He含量变化较小,大部分位于1.04×10~(-12)～4.94×10~(-12)cm~3STP/g的范围之内,~4He含量变化相对较大,0.28×10~(-6)～30.47×10~(-6)cm~3STP/g;~3He/~4He值较高的样品,~4He含量相对较低;~3He/~4He值较低的样品,~4He含量相对较高。这表明榴辉岩中放射性成因~4He的积累对其~3He/~4He值有重要的影响;榴辉岩形成时的初始~3He/~4He比值较测量值应更高一些,可能更接近地幔氦的分布范围;榴辉
The ~ 3He / ~ 4He ratios of the eclogites in the Dabie-Sulu region lie mostly between 0.056 and 0.67 Ra, and are located on the ~ 3He- ~ 4He map at the mixing sites of helium and mantle in the continental crust. The ~ 3He / ~ 4He ratio of the Bixiling eclogite is relatively high, 5.6Ra, with mantle-derived rocks. The 3He content of the eclogites changed little, most of them were in the range of 1.04 × 10 ~ (-12) ~ 4.94 × 10 ~ (-12) cm ~ 3STP / g, the content of ~ 4He was relatively large, 0.28 × 10 ~ (-6) ~ 30.47 × 10 ~ (-6) cm ~ 3STP / g; ~ 3He / ~ 4He higher value samples, ~ 4He content is relatively low; ~ 3He / ~ 4He value lower sample , ~ 4He content is relatively high. This indicates that the accumulation of radiogenic 4He in eclogites has an important effect on the 3He / ~ 4He value. The initial ~ 3He / ~ 4He ratio of eclogites should be higher than the measured value and may be closer to the mantle Helium distribution range;