【摘要】 在河北平泉中元古代高于庄组中鉴别出一系列震积岩 ,包括直立板状裂隙、液化泥晶脉、震褶岩及震积砾屑灰岩等 ,这是目前在中国所发现的最低层位的碳酸盐岩震动液化事件。震积岩主要发育于高于庄组一段上部、二段下部及三段中部 ,据此得出地震活跃期之间具有周期长度为 65Ma±的节律 ,认为此地震节律反映的是燕山裂隙槽北部边缘的断裂活动规律 ,这对于研究燕山裂陷槽的构造演化具有重要的意义。更多还原

【Abstract】 Five seismitic rock units are discovered in the Gaoyuzhuang Formation of Mesoproterozoic in Pingquan County,Hebei Province.It is the earliest record of the seismitic event caused by vibrational liquefaction in carbonate rocks found in China up to date.The cycle rhythm of each period shows as 65 Ma±,which reflects regularity of fault activity on the north margin of Yanshan aulacogen.更多还原