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通过对南大别碧溪岭和横冲两地超高压榴辉岩中多硅白云母和绿辉石的Ar Ar同位素年代学研究 ,揭示出多硅白云母过剩氩的含量高达 ( 0 .4～ 1 .3)× 1 0 -8mol·g-1,进而提出 ,超高压条件下游离Ar从介质向矿物的反向扩散是产生过剩氩的重要条件 .绿辉石Ar Ar年龄谱难以支持加里东期和前加里东期超高压变质的观点 .
Ar Ar isotopic dating of palygorskites and omphacites in the ultrahigh-pressure eclogites from the Bixi Ridge and Hengchong of the Southern Dabieshan revealed that the excess argon content of the pilicas reaches as high as (0.4 ~ 1 .3) × 10 ~ 8mol · g-1, and then proposed under the conditions of ultra-high pressure free Ar from the medium to the reverse diffusion of minerals is an important condition for the production of excess argon. ArAr age spectrum is difficult to support Caledonian Period and pre-Caledonian UHP metamorphism point of view.