Journal cover Journal topic
Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.182 IF 1.182
  • IF 5-year value: 1.437 IF 5-year
    1.437
  • CiteScore value: 3.0 CiteScore
    3.0
  • SNIP value: 0.686 SNIP 0.686
  • IPP value: 1.36 IPP 1.36
  • SJR value: 0.538 SJR 0.538
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 11 Scimago H
    index 11
  • h5-index value: 13 h5-index 13
Volume 4, issue 1
Geosci. Instrum. Method. Data Syst., 4, 111–119, 2015
https://doi.org/10.5194/gi-4-111-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Geosci. Instrum. Method. Data Syst., 4, 111–119, 2015
https://doi.org/10.5194/gi-4-111-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 27 May 2015

Research article | 27 May 2015

Real-time setup to measure radon emission during rock deformation: implications for geochemical surveillance

P. Tuccimei1, S. Mollo2, M. Soligo1, P. Scarlato2, and M. Castelluccio1 P. Tuccimei et al.
  • 1Università "Roma Tre", Dipartimento di Scienze, Largo S. L. Murialdo 1, 00146 Roma, Italy
  • 2Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 60, 00143 Roma, Italy

Abstract. Laboratory experiments can represent a valid approach to unravel the complex interplay between the geochemical behaviour of radon and rock deformation mechanisms. In light of this, we present a new real-time experimental setup for analysing in continuum the alpha-emitting 222Rn and 220Rn daughters over variable stress–strain regimes. The most innovative segment of this setup consists of the radon accumulation chamber obtained from a tough and durable material that can host large cylindrical rock samples. The accumulation chamber is connected, in a closed-loop configuration, to a gas-drying unit and to a RAD7 radon monitor. A recirculating pump moves the gas from the rock sample to a solid-state detector for alpha counting of radon and thoron progeny. The measured radon signal is enhanced by surrounding the accumulation chamber with a digitally controlled heating belt. As the temperature is increased, the number of effective collisions of radon atoms increases favouring the diffusion of radon through the material and reducing the analytical uncertainty. The accumulation chamber containing the sample is then placed into a uniaxial testing apparatus where the axial deformation is measured throughout a linear variable displacement transducer. A dedicated software allows obtaining a variety of stress–strain regimes from fast deformation rates to long-term creep tests. Experiments conducted with this new real-time setup have important ramifications for the interpretation of geochemical anomalies recorded prior to volcanic eruptions or earthquakes.

Publications Copernicus
Download
Short summary
We present a new real-time experimental setup for analysing in continuum radon emissions over variable stress-strain regimes. The setup consists of a radon accumulation chamber that can host large cylindrical rock samples and is connected to a RAD7 radon monitor. The radon signal is enhanced using a heating system. The accumulation chamber is then placed into a uniaxial testing apparatus that allows obtaining a variety of deformation conditions.
We present a new real-time experimental setup for analysing in continuum radon emissions over...
Citation