【摘要】 大别山北部鹿吐石铺含石榴子石斜长角闪岩早期经历了榴辉岩相及随后的麻粒岩相退变质阶段，现主要表现为角闪岩相矿物组合特征。它的全岩＋角闪石Rb－Sr等时线年龄为172±3Ma(I=0.706095)，代表了角闪岩相阶段的退变质年龄。更多还原

【Abstract】 The garnet－ bearing amphibolite at Lutushipu of the Northern Dabie Mountains suffered early eclogite facies and the following granulite facies retrogressive metamorphism .It is characterized by an mineral assemblage(hornblende,plagioclase and magnetite)of amphibolite facies with a few orthopyroxenes and diopsides.Its Rb－ Sr age of whole rock plus hornblende is 172± 3Ma (with I=0.706095)， representing a retrogressive metamorphic age of amphibolite facies.更多还原