Transient to stationary radon (220Rn) emissions from a phonolitic rock exposed to subvolcanic temperatures.

ABSTRACT: Rock substrates beneath active volcanoes are frequently subjected to temperature changes caused by the input of new magma from the depth and/or the intrusion of magma bodies of variable thickness within the subvolcanic rocks. The primary effect of the influx of hot magma is the heating of surrounding host rocks with the consequent modification of their physical and chemical properties. To assess mobilization in subvolcanic thermal regimes, we have performed radon (220Rn) thermal experiments on a phonolitic lava exposed to temperatures in the range of 100-900°C. Results from these experiments indicate that transient Rn signals are not unequivocally related to substrate deformation caused by tectonic stresses, but rather to the temperature-dependent diffusion of radionuclides through the str

SUBMITTER: Mollo S 

PROVIDER: S-EPMC6837235 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature