A study of the deformation characteristics of the ductile shear zone in the Wulonggou gold ore concentration area, East Kunlun, Qinghai

Field structural analysis and microstructural analysis show that Wulonggou area has experienced a long-term structural evolution, characterized tectonically by multi-level and multi-storeyed products. Its can be broadly divided into the ductile deformation that occurred in early Triassic(240 Ma ±) and its previous period, late Indosinian-early Yanshanian(235-197 Ma)brittle-ductile deformation; brittle deformation that occurred after late Yanshanian period, especially in the early-middle Himalayan period(51-21 Ma). Late Triassic-Early Yanshanian brittle-ductile deformation was accompanied by orogenic uplift, and its performance was exhibited by the folding and faulting of the pre-existing metamorphic core on the northeast wing of thetectonites, which laid the foundation of the NWW-trending main tectonic line in the Wulonggou area, i.e., a number of formal NWW-trending ductile shear zones exhibit parallel distribution, with the tectonic activities developed in order of left-handed positive sliding-left-handed thrusting →right-handed positive sliding.