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Volume 17 Issue 3
Sep.  2006
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A Preliminary Report on Yong’anpu Tectonic Window in Suizhong County , Western Liaoning Province

  • Received Date: 2018-07-19
  • 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 Yong’anpu(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 stronglycontractional deformationin the Yanshan belt after the eruption of EarlyCretaceousZhangjiakouvolcanic rocks. On the basisof mappingand research, it is concluded that the published official geological mapshave failed toidentify the major structural features of the Yanshan belt.
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通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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

  • 1. Key Laboratory of Isotope Geochronology and Geochemistry , Guangzhou Institute of Geochemistry , Chinese Academy of Sciences, Guangzhou 510640, China

Abstract: 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 Yong’anpu(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 stronglycontractional deformationin the Yanshan belt after the eruption of EarlyCretaceousZhangjiakouvolcanic rocks. On the basisof mappingand research, it is concluded that the published official geological mapshave failed toidentify the major structural features of the Yanshan belt.

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