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大别造山带东段南、北大别两类不同产状的柯石英榴辉岩同位素地质年代学对比研究表明:(1)石马榴辉岩超高压变质事件发生于471±2Ma前,并受到海西斯热事件(榴辉岩重结晶)的迭加;(2)碧溪岭与超镁铁质岩共生的榴辉岩是晚元古代北大别古岛弧(镁铁—超镁铁质堆晶岩系)超高压变质作用的产物,镁铁—超镁铁质堆晶岩系可能形成于914±56Ma;(3)大别地区东部加里东期和印支期超高压变质带并置,反映了造山带形成多期“开”“合”的复杂演化史.
A comparative study of isotopic geochronology of two types of coesite eclogites in the eastern part of the Dabie orogenic belt shows that: (1) the UHPM metamorphic events of the Shimat eclogite occur before 471 ± 2Ma and are influenced by Hercynian (2) the eclogite coexisting with the ultramafic rocks in the Baili Mountains is the Late Proterozoic North Dabie ancient island arc (mafic-ultramafic heap (3) the eastern Caledonian and Indosinian UHP metamorphic belts in the eastern part of the Dabie area are juxtaposed, reflecting the formation of the mafic-ultramafic intrusive rocks. The orogenic belt formed a multi-period “open” “complex” evolutionary history.