Abstract: This paper deals with the data of chemical analysis of 27 samples collected from the region of Junan and Rizhao, Shandong province, among them 8 are eclogites, 2 pyro-xenites, 11 clinopyroxenes and 6 garnets.Based upon their mineralogical and petrochemical characteristics, two types of eclogites can be recognized, e. g. basic and ultrabasic. They are closely related to the ult-rabasic intrusions emplaced in Precambrian metamorphics.Judging from the P-T conditions estimated by Fe⁺⁺-Mg being distributed between coexisting clinopyroxenes and garnets in eclogites as well as the average thermal gradient of Precambrian shield it is concluded that the basic eclogite might have originatedat a depth of 100km. whereas the ultrabasic eclogite at a depth of 40-60km.

摘要： 本文提供了有关莒南、日照地区榴辉岩类的地质产状、岩石矿物特征以及岩石和矿物的化学分析结果。根据所得资料将榴辉岩分成两类并估计了它们的形成条件和来源。