Abstract
Abstract We report Pb concentrations and isotopic compositions measured in plume aerosol and Pele's hair (lava) samples collected from Masaya volcano, Nicaragua, to provide the first data pertaining to Pb emissions from the Central American volcanic arc. Lead isotopic compositions, determined by Thermal Ionisation Mass Spectrometry, in the Pele's hair samples were found to be 206 Pb/ 207 Pb∼1.196, 208 Pb/ 207 Pb∼2.46 and 206 Pb/ 204 Pb∼18.6. Mean Pb fluxes from Masaya were calculated to be 1.0 ton Pb yr −1 with a mean plume Pb/S (gas) ratio of 1.3×10 −5 . Also, it was found that the majority of Pb emitted was present in the fine aerosol (
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