Low atmospheric oxygen levels during the mid-Proterozoic were occasionally interrupted by transienthigh oxygen levels. The cause of mid-Proterozoic ocean redox variability remains unclear. Here weinvestigate mercury chemostratigraphy across the Jixian section of North China Craton through twooxygenation intervals. Abnormal spikes in mercury concentration and excursions of mercury isotopesare observed in the Dahongyu and Hongshuizhuang formations, which occur just below the twooxygenation intervals, respectively. These mercury anomalies suggest that the two oxygenationevents were preceded by subaerial volcanism. Furthermore, the two oxygenation intervals showincreased nutrient concentrations and negative shifts in mercury isotopes, indicating that enhancedweathering and terrestrial nutrient influx occurred during oxygenation intervals. We infer that in thebreakup setting of the Columbia supercontinent, large igneous province volcanism and its efficientlow-latitude weathering could rapidly increase terrestrial nutrient influx into the ocean, promotingoceanic productivity and a pulsed rise in oxygen levels.