Abstract
Radon (222Em) emanation measurements in soil gases are reported in connection with the 1982 eruptions of El Chichón Volcano.222Em detection is performed with LR-115 cellulose nitrate track detectors. Results show a general decreasing pattern of222Em concentration in soil with time after the eruptions. Activity measurements of radon daughters in ashes show that a large amount of222Em and220Em was released from magma degassing during the eruptions, and that only a fraction of the degassed magma was erupted. An important fluid interaction between the magma chamber and the surrounding sedimentary rock is also suggested.
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De la Cruz-Reyna, S., Mena, M., Segovia, N. et al. Radon emanometry in soil gases and activity in ashes from El Chichon Volcano. PAGEOPH 123, 407–421 (1985). https://doi.org/10.1007/BF00880740
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DOI: https://doi.org/10.1007/BF00880740