Geometric Structural Features of the F5 in Tanlu Fault Zone Revealed by Drilling Joint Profile in High-Tech District of Xinyi City,Jiangsu Province
PAN Rongqing
CHEN Lichun
LI Yanbao
CAO Jun
WANG Hongda
WANG Wenchao
Abstract：The Anqiu-Juxian Fault(F5)in the Tanlu Fault Zone is the seismogenic fault of the Tancheng M81/2 earthquake in 1668.The surface rupture caused by this earthquake may have extended to the area of South Maling Mountain,south of Xinyi City center.The results of active fault detection in Xinyi City indicate that F5 passes through Xinyi City in the form of a concealed fracture,which is a Holocene active fault.On this basis,this paper carried out the precise positioning and comprehensive analysis of the joint profiles of multiple drillholes in terms of the spatial distribution and Late Quaternary activity of F5 in the high-tech zone,revealing that the fault is divided into the east and west branches,with the east branch being a Late Pleistocene fault and the west branch being a Holocene fault,showing a discontinuous right-ordered diagonal lineup,which is not a simple shear tensile order area.The results provide new information and understanding for the future seismic hazard evaluation of the Tanlu Fault Zone and the earthquake fortification of Xinyi City.
Keywords：Tanlu faultAnqiu-Juxian faultActive faultLate QuaternaryDrilling joint profile
Publication Date：2024-09-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 11-22 )