Open AccessNear real-time field measurements of δ13C in CO2 from volcanoes
Author(s) -
John Stix,
G. Lucic,
K. Malowany
Publication year - 2017
Publication title -
bulletin of volcanology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.945
H-Index - 93
eISSN - 1432-0819
pISSN - 0258-8900
DOI - 10.1007/s00445-017-1144-6
Subject(s) - volcano , caldera , plume , geology , atmosphere (unit) , δ13c , carbon dioxide , volcanic gases , spectrometer , trace gas , mineralogy , atmospheric sciences , earth science , environmental science , stable isotope ratio , geochemistry , meteorology , chemistry , optics , physics , nuclear physics , organic chemistry
This paper describes the operation and application of a portable cavity ring-downspectrometer (CRDS) designed to measure the isotopic composition of carbon dioxide.The instrument is capable of measuring δ13C for CO2 concentrations ranging fromatmospheric (400 ppm) to 100%, at precisions and accuracies that are comparable tolaboratory-based gas source mass spectrometers. This flexibility and portability are ideal for applications on active volcanoes, and it is now possible to obtain isotopicmeasurements on a near real-time basis. We show applications of the CRDS for soilgases on volcanoes and in calderas, for characterizing the isotopic composition of avolcanic plume, and for measuring the temporal variability of δ13C in the atmosphere.Future directions hold the potential to use volcanic gas isotopes for monitoring purposes, and to combine different isotopic systems to reveal the source or sources of gas
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