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论述了石榴石和绿辉石的氦、氩同位素地球化学特征,并讨论了大别山榴辉岩的成因。测得3 He/4He 值为(1-19 ～4-63) ×10 - 7 ,40Ar/36Ar 值为1209 ～4416 ,4 He/40Ar 值分布在0-07 ～1-39 范围内,3 He/36 Ar 值的变化范围为(0-59 ～2-85) ×10 - 4 。大别山榴辉岩中保留了原始的稀有气体同位素, 但是退变质作用使氦同位素优先丢失。氦、氩同位素地球化学资料表明,榴辉岩可能形成于亏损的地幔或者是一种亏损型“地幔岩”中。
The geochemical characteristics of the helium and argon isotopes of garnet and omphacite are discussed, and the genesis of the eclogite in the Dabie Mountains is discussed. The measured values of 3 He / 4He were (1-19 ~ 4-63) × 10-7, the value of 40Ar / 36Ar was 1209-4416, the value of 4 He / 40Ar was in the range of 0-07- 1-39, and the value of 3 He The value of / 36 Ar varies from (0-59 ~ 2-85) × 10 - 4. The original rare gas isotopes are retained in the Dabie eclogite, but the degeneracy effect preferentially removes helium isotopes. Helium and argon isotope geochemistry data indicate that eclogites may be formed in depleted mantle or a depleted “mantle rock”.