Coupled Basin‐Mountain Data Record the Permian‐Triassic Tectonic Transition Along the Eastern Margin of Eurasia

Abstract The eastern margin of Eurasia records complex tectonic events from its interaction with the Paleo‐Asian, Mongol‐Okhotsk, and Paleo‐Pacific Ocean plates during the late Paleozoic to early Mesozoic. However, the subduction histories remain controversial. We employed detrital zircon U‐Pb geochronology and trace element analyses to investigate the provenance of strata of this age within the Jiamusi Massif of NE China. To mitigate age bias from variations in zircon fertility, we compiled zirconium concentrations from 338 granitoid samples across the massif, grouped into four categories: Neoproterozoic (996–722 Ma), early Paleozoic (538–446 Ma), late Paleozoic‐early Mesozoic (338–209 Ma), and Cretaceous (112–92 Ma). Applying the zircon fertility factors (ZFFs) revealed no difference between the early Paleozoic and late Paleozoic‐early Mesozoic suites, which we combined, resulting in values of 1.58, 1.45, and 1.0, respectively. After correcting detrital zircon age spectra using these ZFFs, a sediment provenance shift was evident from active magmatic arcs along the eastern margin of the Jiamusi Massif during the early Permian, to collisional orogenesis between the Jiamusi and Songliao massifs in the Late Triassic along the western margin. Integration with regional tectonic data defines a transition in geodynamics from subduction of the Mongol‐Okhotsk Ocean in the early Permian to combined subduction and collision related to the Paleo‐Pacific domain in the Late Triassic. This study improves the accuracy of interpreting provenance evolution through multi‐dimensional provenance analysis using ZFF correction procedures and offers a reproducible methodology for refining tectonic reconstructions of accretionary orogens and other tectonically complex regions worldwide.