相山地区变质岩划分为４个变质岩带，由南往北依次分布，构成典型的递增变质带。十字石的出现表明变质作用已达到低角闪岩相。获得十字石云母片岩及斜长角闪片岩ＲｂＳｒ等时年龄分别为７１９．７、７２７．６Ｍａ。首次厘定相山变质岩形成于新元古代，而非加里东期变质。其原岩的成岩时代应为前震旦纪 The metamorphic rocks in the Xiangshan area are divided into four metamorphic rocks, which are distributed in turn from south to north, forming a typical incremental metamorphic belt. The presence of the stalagmites indicates that the metamorphism has reached the low amphibolite facies. Obtained cross-Stony mica schist and plagioclase amphibole Rb  Sr isochronous age were 719.7,727.6Ma. For the first time, it was determined that the Xiangshan metamorphic rocks were formed in the Neoproterozoic, rather than the Caledonian metamorphism. The original rock diagenetic era should be the Pre-Sinian