This article conducts petrological，geochemical，zircon U–Pb geochronology，and Hf isotope studies on the widely exposed granitic rocks in the Yuka ultra–high pressure metamorphic terrane in the Northern Qaidam basin．The zircon U–Pb dating results indicate that the granitic rocks in the Yuka ultra–high pressure metamorphic terrane have obtained metamorphic ages of 929 ± 6 Ma，magmatic crystallization ages of 915 ± 6 Ma to 904 ± 5 Ma，and early Paleozoic magma crystallization ages of 420 ± 3 Ma to 402 ± 4 Ma．The geochemical characteristics of the rocks show that the K2O / Na2O ratio of the Yukahe and Kaipinggou gneiss like diorite granite is 1.53 to 2.60，which is a high potassium calcium alkaline potassium basalt series and has a low zircon εHf(t) value（- 12.86～- 0.76）indicates that the source rock is metasedimentary rock or metamorphic greywacke．Caishigou and Xigou Asbestos mine granite gneiss have K2O / Na2O < 1，belonging to the medium potassium calcium alkaline series．Compared with the Yukahe and Kaipinggou gneiss like diorite granite，the Eu anomaly is not obvious and has a Sr positive anomaly．The source rock has characteristics of amphibolite or quartz diorite source area．The granite gneiss of the Xigou asbestos mine εHf(t) value ranges from - 5.21 to + 15.52，indicating the heterogeneity of the material composition in the source area of the granite gneiss in the Xigou asbestos mine．The source area may be mainly composed of basic new crustal material，with some contamination of ancient crustal material．The samples obtained in this article have a relatively high zirconium saturation temperature（732 ℃～809 ℃）．Combined with geochemical characteristics，it is shown that the source rocks of the granite rocks in the Yuka terrane are metamorphic sedimentary rocks and metamorphic basic rocks，mainly composed of muscovite and hornblende dehydrated and melted．Combined with regional geological data，the granitic rocks in the Yuka terrane about 915～904 Ma were formed in the post–collision tectonic setting．The Xigou asbestos mine granite gneiss records metamorphic fluid transformation events of the Neoproterozoic crust at 420～400 Ma，which may be related to the melting event during the reentry process of the deep subduction continental crust．The granite rocks in the Yuka ultra–high pressure metamorphic terrane in the Northern Qaidam basin have recorded multiple melting / metamorphic fluid transformation events during the orogenic processes of the Neoproterozoic and Early Paleozoic．