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中文摘要：
对大别-苏鲁造山带和华北陆块东南缘中生代碰撞后镁铁质岩浆岩进行详细的同位素年代学和地球化学研究，结果显示出弧型微量元素分布特征、富集的Sr-Nd—Pb—Hf同位素组成和异常的锆石δ18O值．尤其特别的是，大别造山带部分镁铁质岩浆岩具有低的锆石占墙。值并含有新元古代和三叠纪u—Pb年龄的残留锆石，这是区分俯冲华南陆块与上覆华北陆块的鉴定性特征．这些特征指示它们来源于造山带岩石圈地幔的部分熔融．在三叠纪大陆碰撞过程中，来源于俯冲华南陆壳的长英质熔体与上覆华北岩石圈地幔橄榄岩反应，形成了富集的造山带岩石圈地幔．根据某些特定的微量元素比值如Ba／Th，Sr／Rb和（La／Yb）N等，可以厘定出卷入大陆俯冲隧道壳幔相互作用的陆壳物质既有俯冲陆壳基底，也有上覆沉积盖层．因此，碰撞造山带以及上覆陆块边缘的碰撞后镁铁质岩浆岩为大陆俯冲带壳幔相互作用提供了岩石学和地球化学记录．
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