Abstract: On the basis of the study of metamorphic rock in the Jiaonan group along the northern Jian-su～southern Shandong area,along with the data of the characteristics of boundary rocks,lateral undiscontinuity,types of rocks,correlation of rocks and the isotopic dating,the authors suggest that the group in question is not for the implication of single strata unit and is embeded between the Wulian-Rongcheng fault and the Haizhou-Siyang fault.The former contains three tectonic levels,its formation being presumably related to the opening／locking of the deep-seated bound-ary faults instead.

Key words: Metamorphic, Tectonic, Deep fractnre, Jiansu, Shaudong, Jiaonan group

摘要： 对苏北～胶南一带胶南群的变质岩系进行研究,其边界特征、横向不连续性、岩石类型及相互关系、同位素年龄等资料表明,胶南群不具有单一地层单元的含义,而是挟于五莲-荣成断裂与海州-泗阳断裂之间的构造岩石组合体,它由上壳岩类和深源岩类组成,前者包括了3个构造位。其形成可能与边界深大断裂的开合作用有关。

关键词: 变质岩, 构造岩, 深大断裂, 江苏, 山东, 胶南群