论文部分内容阅读
The Karakorum Fault zone(KFZ)plays an important role in understanding the formation,evolvement and deformation of the Tibetan Plateau.The high-T dextral shearing metamorphic rocks,e.g.,mylonites or mylonitized gneisses-granites,locally crop out along the southeastern part of the KFZ in the Ayila Ri’gyüRange area.The SHRIMP U-Pb dating of the syn-kinematic crystallized zircons indicates that the initial age of the KFZ is~27 Ma,~10 Ma older than previous results.The extensive high-T dextral shearing along the KFZ started at least at 27-20 Ma,accompanied by the syn-kinematic emplacement of leuco-granites.Deformation and concomitant fluid circulation during shearing most likely occurred as early as at 25-13 Ma.The KFZ probably grew from southeast to northwest along the fault as a result of continuous convergence between the India plate and Eurasia plate.
The Karakorum Fault zone (KFZ) plays an important role in understanding the formation, evolvement and deformation of the Tibetan Plateau. High-T dextral shearing metamorphic rocks, eg, mylonites or mylonitized gneisses-granites, locally crop out along the southeastern part of the KFZ in the Ayila Ri’gyüRange area. The SHRIMP U-Pb dating of the syn-kinematic crystallized zircons that the initial age of the KFZ is ~ 27 Ma, ~ 10 Ma older than previous results. extensive high-T dextral shearing along the KFZ started at least at 27-20 Ma, accompanied by the syn-kinematic emplacement of leuco-granites. Information and concomitant fluid circulation at shearing most likely occurred as early as at 25-13 Ma. KFZ probably grew from southeast to northwest along the fault as a result of continuous convergence between the India plate and Eurasia plate.