Data from: Determining the age of Guadalupian extinction by in situ uranium–lead geochronology in regard to middle Permian giant bivalve Alatoconchidae fossils in the Northwest Margin of the South China Plate

This dataset covers three core modules: geochronological data, geochemical data, and petrological and sedimentary environment data. The data of each module are interrelated and jointly support the research conclusion on the relationship between the extinction of Alatoconchidae in the Middle Permian and the volcanic activity of the Emeishan Large Igneous Province (ELIP).