The Correlation of Liquefied Vein Structures Caused by Earthquake in Different Geological Periods in the Yishu Fault Zone and Its Vicinity

In the Yishu fault zone and its surrounding area,seismites have been discovered in four horizons,i.e.Sinian Shiwangzhuang Formation,Cambrian Mantou Formation,Paleogene Zhubidian Formation and Shahejie Formation.All of Seismites are seismo-depositional layers with the liquefied vein structure and other seismogenesis intra-layer structures.Through some correlation and analysis in many ways,it is confirmed that liquefied vein structures of different horizons possess some alike or common features,which reflects that the origin of liquefied vein structures is identical in different geological periods.It is considered that Precambrian"molar tooth structure" with common features of liquefied vein structures is called "liquefied vein structure of micritesparry limestone"best.