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超高压变质岩因其在岩性与原岩上的多样性,以及其岩块与基质混杂的构造特征而具变质混杂岩属性,其顺时针型P-T轨迹表明,超高压岩石的形成与演化与碰撞造山作用有关,年代学研究表明,峰期超高压变质作用发生于中-晚三叠世,几个不同地点的超高压岩石的P-T-t轨迹已被归纳,并据之计算了超高压岩石的折返速率.计算表明,大别山超高压岩石的折返具多阶段性,即中-晚三叠世的快速折返(3.3～3.6mm/a),早侏罗世的中速折返(0.7～1.1mm/a),以及中侏罗世至早白垩世的极慢速折返(0.15mm/a).以上述资料为约束条件,提出了一个大别山造山带的柱状模型.
Ultrahigh-pressure metamorphic rocks have metamorphic melange properties due to their diversity in lithology and protolith, as well as the structural features of their lithofacies and matrices. Their clockwise PT trajectories indicate that the formation and evolution of ultrahigh-pressure rocks and collisions Orogeny, and chronological studies indicate that the UHP metamorphism occurred in the middle-late Triassic during the peak period. The PTt trajectories of the UHP rocks in several different locations have been summarized, and the rate of reentry of the UHP rocks has been calculated The calculation shows that the reenforcement of the EHV rocks in the Dabie Mountains is multi - stage, that is, the mid - late Triassic rapid reentry (3.3-3.6 mm / a), the middle Jurassic middle reentry (0.7-1.1 mm / a) , And very slow reentry (0.15mm / a) from Middle Jurassic to Early Cretaceous.Using the above data as constraints, a columnar model of the Dabieshan orogenic belt was proposed.