Late Quaternary Activities and Paleoearthquakes at Quba Along Middle Segment of Gyaring Co Fault in Central Tibet
WANG Duo
CHEN Lichun
LI Yanbao
DU Jinhua
JIA Yongshun
XUE Keyi
WANG Xulong
YIN Gongming
Abstract：The study of Late Quaternary paleoearthquakes of the Gyaring Co Fault is a key link in understanding the tectonic deformation and seismic hazard assessment in the Central Tibet.This paper conducted field investigations,unmanned aerial vehicle photogrammetry,trench excavation,optically stimulated luminescence(OSL)dating,and radiocarbon dating at Quba along the middle segment of the Gyaring Co Fault.Five paleoearthquakes were identified:E1(59.0±2.1 ka BP),E2(57.1±2.2 ka BP),E3(30.2±1.4 ka BP),E4(12.5±0.6 ka BP),and E5(2.2-3.2 ka BP).The results reveal that the elapsed time of the latest event is over 2.2±0.3 ka,which approaches the estimated recurrence interval of the MW 7.4 earthquake.It indicates strong seismic risk along the middle segment of the Gyaring Co Fault.
Keywords：Tibet PlateauGyaring Co FaultLate QuaternaryPaleoearthquakeOSL dating
Publication Date：2024-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )