A Preliminary Report on Yong'anpu Tectonic Window in Suizhong County, Western Liaoning Province  

作　　者：汪洋 姬广义 

机构地区：[1]Key Laboratory of Isotope Geochronology and Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences [2]School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China [3]Geological Institute of Beijing Municipality

出　　处：《Journal of China University of Geosciences》2006年第3期231-237,共7页中国地质大学学报（英文版）

基　　金：This paper is financially supported by the National Natural Science Foundation of China (Nos .40572128 ,40376013 ,40104003) .

摘　　要：For understanding the Mesozoic tectonics of Yanshan （燕山 ） belt, the authors took geological mapping in the belt. A large-scale thrust structure was identified in Yonganpu （永安堡） area. in the western part of Suizhong （绥中 ） County, Liaoning （辽宁 ） Province during our recent mapping in the Yanshan belt. The hanging wall of the thrust was composed of Archean gneiss and the overlying Early Cretaceous Zhangjiakou （张家口 ） Formation; meanwhile, the strongly ductile deformed volcanic rocks of Zhangjiakou Formation comprised the footwall in Yong＇anpu tectonic window. This discovery indicates the existence of strongly contractional deformation in the Yanshan belt after the eruption of Early Cretaceous Zhangjiakou volcanic rocks. On the basis of mapping and research, it is concluded that the published official geological maps have failed to identify the major structural features of the Yanshan belt.For understanding the Mesozoic tectonics of Yanshan （燕山 ） belt, the authors took geological mapping in the belt. A large-scale thrust structure was identified in Yonganpu （永安堡） area. in the western part of Suizhong （绥中 ） County, Liaoning （辽宁 ） Province during our recent mapping in the Yanshan belt. The hanging wall of the thrust was composed of Archean gneiss and the overlying Early Cretaceous Zhangjiakou （张家口 ） Formation; meanwhile, the strongly ductile deformed volcanic rocks of Zhangjiakou Formation comprised the footwall in Yong＇anpu tectonic window. This discovery indicates the existence of strongly contractional deformation in the Yanshan belt after the eruption of Early Cretaceous Zhangjiakou volcanic rocks. On the basis of mapping and research, it is concluded that the published official geological maps have failed to identify the major structural features of the Yanshan belt.

关 键 词：thrust structure REFOLDING structural mapping Early Cretaceous Yonganpu. 

分 类 号：P542[天文地球—构造地质学]