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在相山北部首次发现十字石片岩及堇青石片岩。根据随变质作用增强而出现的新变质矿物，将相山变质岩基底划分为绢云母千枚岩带、黑云母片岩带、铁铝榴石片岩带和十字石片岩带。获得相山地区黑云母片岩－十字石片岩的Ｒｂ－Ｓｒ等时线年龄值为７１９Ｍａ，斜长角闪片岩的Ｒｂ－Ｓｒ等时线年龄值为７２６．６Ｍａ，表明相山基底变质岩属新元古期变质岩而不是加里东期变质岩。提出并采用微量元素地球化学比值聚类分析方法，确认相山地区变质岩原岩不属震旦系，而与华夏地块（古陆）的陈蔡群相当。
The first cross-slate and cordierite schists were found in the northern part of the mountain. According to the new metamorphic minerals with the enhancement of metamorphism, the basement of the Xiangshan metamorphic rocks is divided into sericite-phyllite belt, biotite schist belt, armandite schist belt and phonolite schist belt. The Rb-Sr isochron age is 719Ma for the biotite schist-phonolite schist in the Xiangshan area, and the Rb-Sr isochron age for the plagioclase amphibole is 726.6Ma, indicating that the metamorphic rock of the Xiangshan basement is a new Proterozoic metamorphic rocks instead of Caledonian metamorphic rocks. The microelement geochemical ratio clustering analysis method is proposed and used to confirm that the metamorphic rocks in the Xiangshan area are not of Sinian origin but rather equivalent to the Chencai group of the Huaxia block (ancient land).