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采用激光探针 40 Ar- 39Ar法对大别山碧溪岭榴辉岩样品中的石榴石和绿辉石单颗粒矿物进行原位测定 ,获得了两条等时线年龄。结果表明该区榴辉岩经历了两期构造热事件 :榴辉岩超高压变质作用发生在加里东期 ,燕山期年龄为快速抬升折返的热事件年代记录。
In situ determination of garnet and omphacite monolithic minerals in the Bixi eclogite from the Dabie Mountains by laser probe 40 Ar-39Ar method, two isochron age were obtained. The results show that the eclogites in this area experienced two tectono-thermal events: the EHV metamorphism of the eclogite occurred in the Caledonian and Yanshanian age records of rapid thermal events.