【作者】 杨明； 张梅生； 李晓波； 王旖旎；

【Author】 YANG Ming,ZHANG Mei-sheng,LI Xiao-bo,WANG Yi-ni (Collage of Earth Science Jilin University,130061 Changchun Jilin China)

【机构】 吉林大学地球科学学院；

【摘要】 本文报道在辽宁兴城夹山地区首次发现的中元古代团山子组顶部古岩溶地质记录,系统描述其风化层、溶蚀裂隙、岩溶角砾岩、填隙物角砾岩等主要的岩溶特征,并将该古岩溶事件的演化过程划分为五个阶段。团山子组沉积之后,地壳抬升,暴露地表,遭受了一定时期的风化剥蚀。该古岩溶事件为讨论"兴城运动"提供了新的素材,且很可能是现知华北地台地质历史中最早的古岩溶,具有重要的构造古地理意义。更多还原

【Abstract】 The Mesoproterozoic Tuanshanzi paleokarst is newly discovered in Xingcheng area,Liaoning. This paper described the weathered layer,corrosion cracks,karst breccias,interstitial material and other major karst characteristics.The evolution of the paleokarst event is divided into five stages.In Xingcheng area,the crust uplifted after the deposition of Tuanshanzi Formation,then,it exposed above surface and underwent weathering erosion for a certain period.The paleokarst event provides a new material on discussing the "Xingcheng movement",and is likely to be the currently known earliest paleokarst in geologic history on the North China platform,thus has important tectonic paleogeographic significance.更多还原