Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet

Volcanic eruptions can release a large amount of volatiles, including sulfur dioxide and carbon dioxide, into the atmosphere trigger regional and/or global perturbations climate environment. However, potential effect Linzizong volcanism, most intense widespread magmatism in southern Tibet, is not yet known. Here, systematic results fieldwork, spatial distribution analysis (area volume), zircon UPb age dating 54 samples are reported from volcanic rocks (Dianzhong, Nianbo Pana Formations) Linzhou Pangduo basins, Tibet. Our new ages 40 compilations previous data indicated that Formation erupted rapidly ca. 52–50 Ma, consistent with coeval “flare-up” (?51 Ma) Gangdese batholith. The average eruption fluxes lower (Dianzhong Formation), middle (Nianbo upper (Pana Formation) parts sequence 11.8, 1.44, 3994 km3/Ma, respectively. Evidence high flux (3994 km3/Ma), magnitude (M = 8.80), Explosivity Index (VEI 8) basins suggests this may represent “supereruption” event Early Eocene. rapid was pervasive across Tibetan Plateau potentially extends to Sumatra, Southeast Asia, consequences for CO2 could drive Eocene Climatic Optimum (EECO).