论文部分内容阅读
狼山地区色尔腾山岩群的研究对探讨华北板块北缘西段晚太古代的构造演化及指导该区铁、铜等矿产勘查具有重要意义。通过对尚德—明路一带色尔腾山岩群的地球化学特征及构造环境研究发现,研究区色尔腾山岩群岩石中富钠贫钾,轻稀土富集,Eu略微亏损;总体富集微量元素;原岩建造为泥质碎屑岩—中基性火山岩和碳酸盐岩建造特点,形成环境为滨海相—浅海相,伴随有小规模的岛弧型火山喷发,晚太古代古蒙古洋开始闭合;同时较厚的碳酸盐岩的沉积说明尚德—明路一带海水较深,不利于含铁、铜的物质沉积。
The study of the Serteng rock mass in the Langshan area is of great significance to the study of the tectonic evolution of the Late Archean in the western section of the northern margin of the North China Plate and to guide the exploration of iron, copper and other minerals in this area. Based on the geochemical characteristics and tectonic setting of the Serteng rock group in the area of Suntech - Minglu, it is found that the rocks in the Sertour rock group are rich in sodium and potassium, light rare earth and slightly depleted in Eu. The overall enrichment of trace Element; the original rock was built as a muddy clastic - a basic volcanic rock and carbonate rock construction characteristics, the formation of the environment for the coastal phase - shallow marine, accompanied by small island arc volcanic eruptions, late Archean ancient Mongolia Began to close; at the same time, the deposition of thicker carbonate shows that the seawater in the area of Suntech-Minglu is deep, which is unfavorable to the deposition of iron and copper.