Paleoproterozoic polymetallic (U-Th-Pb-Nb-Ta-REE) mineralized pegmatite system within the Daqingshan terrane along the northern margin of the North China Craton (NCC), China. approximately 30 m wide and over 2000 m long, with a clear boundary from the surrounding rocks. Along the transition from the outer zone towards the core of the pegmatite, four non-mineralized granitic pegmatite (GP) samples, namely GP1, GP2, GP3, and GP4, were collected sequentially. These four samples are flesh-colored K-feldspathic graphic granitic pegmatites, primarily composed of K-feldspar, plagioclase, and quartz, exhibiting a typical graphic texture. From GP1 to GP4, the content of K-feldspar increases, accompanied by abnormal elevations in uranium and rare metal elements. Additionally, two mineralized pegmatite (MP) samples, MP1 and MP2, were collected from the intermediate zone of the pegmatite dike. These two samples are mineralized dark flesh-colored K-feldspathic pegmatites, mainly composed of K-feldspar megacrysts and large dark-colored uranium-rare earth minerals, with minor quartz and plagioclase. Detailed petrographic, mineralogical, major and trace element geochemical analyses, as well as zircon LA–ICP–MS U-Pb dating and electron probe micro-analyzer (EPMA) U–Th–PbTotal dating of uraninite, were conducted on the collected samples.

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