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温泉环斑花岗岩分布于河北省赤城县温泉一带,面积约50km2。在1:25万延庆县幅区域地质调查工作的基础上,笔者研究了该岩体的产出状况、侵入关系等地质特征。结合岩石学、地球化学及同位素年龄等证据,探讨了温泉环斑花岗岩的形成时代。研究表明,该岩体为富钾、过铝、高铁、低钙、低镁A型花岗岩,形成于中元古代,相当于长城纪大红峪期,与北京市密云县沙厂环斑花岗岩可以对比。同时也为华北板块基底的克拉通化时间及其在中元古代发生的裂解事件提供了岩石学及同位素年龄依据。
Hot Springs Ruanban Granite is located in Wencheng, Chicheng County, Hebei Province, with an area of about 50km2. Based on the 1: 25000 Yanqing County Regional Geological Survey, the author studied the geological characteristics of the rock mass such as the output status and intrusive relationship. Combined with the evidences of petrology, geochemistry and isotopic age, the forming age of hot-ring-ringed granite was discussed. The study shows that the rock mass is rich in potassium, aluminum, high iron, low calcium and low magnesium type A granites, formed in the Mesoproterozoic, which is equivalent to the Dahongdian Dahongyu period, which can be compared with that of the Shachang porphyry in Miyun County, Beijing . At the same time, it also provided the petrology and isotopic age basis for the cratonization time of the basement of the North China Plate and its cracking event in the Mesoproterozoic.