The crustal deformation characteristics of typical tectonic region in the western segment of the Jiali fault derived from GPS observations
In order to confirm the pre research conclusion of the coexistence of strike slip and tension crustal deformation characteristics in the western section of the Jiali Fault Zone,this article sets up 5 GPS flow observation stations in key structural areas to obtain the current horizontal velocity field of crustal movement in the region,and quantitatively provides the sliding rates of different faults using the cross fault GPS baseline method.The geodetic observation data obtained through experiments have proven the correctness of the deformation characteristics proposed in geological research,and quantitative analysis has been provided for the sliding rate.The results show that the western section of the Jiali Fault Zone,from Lamuqing to Sangdi,exhibits dextral and compressional movements,with a dextral strike slip rate of 2.7±0.8 mm/a and a compression rate of 1.9±0.6 mm/a;The extensional basin located on the north side of the Jiali main fault has a tensile rate of 2.8±1.0 mm/a,and the tensile rate of the southern extensional basin is 2.1±0.5 mm/a.The research results of this article can better explain the structural deformation characteristics of the western section of the Jiali Fault Zone and provide technical reference for studying the kinematic characteristics of crustal deformation in the Qinghai-Xizang Plateau.
Jiali faultGPS data processingcross-fault baselineslip ratedeformation charac-teristic
NETL
NSTL
万方数据
