Geologic Process of the Sibao Cycle in the Liaodong Peninsula and Its Tectonic Significance: A Case Study of the Yushulazi Formation in Eastern Liaoning Province

• 责任者：Yu Haifeng (Liaoning Institute of Geological Exploration ; Dalian 116100 ; China) ; Dong Wande
• 刊名：Geology and Resources
• 出版年：2010
• 卷期：19(3)
• 关键词：地质作用 ; geologic process ; 构造演化 ; structural evolution ; 辽东半岛 ; Liaodong Peninsula
• 页码：p.224-229
• 图表：4 illus., 1 table, 7 refs.
• 分类号：0300
• issnNo：ISSN1671-1947
• isbnNo：CN21-1458/P

The study on the rock association, metamorphism, deformation and isotopic geochronology shows that the Yushulazi Formation in Eastern Liaoning Province is a single terrigenous clastic iron formation with metamorphism of greenschist facies. Its age belongs to Mesoproterozoic. The Yushulazi Formation underwent the tectonic deformation of Sibao Cycle during the period between the folding of the underlying Liaohe Group and the sedimentation of overlying Yongning Formation. The Yushulazi Formation, together with Yongning Formation, which quickly accumulated in the end of Sibao Cycle, formed the middle structural layer, making the three-layered structure of the crust in Eastern Liaoning region.