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Diffuse CO2 degassing survey for Hierro and Teide summit cone, El Hierro and Tenerife

July
Number of positions available: 2

internships_08_2018

During repose periods, volcanoes can release large amounts of gas as visible (fumaroles, solfataras, plumes) and non-visible (diffuse degassing) emanations. The surface dynamics of gas emissions are usually controlled by local volcano-tectonics and hydrology, as permeable tectonic structures are the main pathways for the transport of gases to the surface. Because CO2 is the major gas species after water vapour both in volcanic fluids and in magmas and is an effective tracer of subsurface magma degassing, diffuse CO2 emissions at volcanoes have played an important role in volcano monitoring.

The goal of this study is to evaluate 2019 diffuse CO2 emissions from the oceanic active volcanic island of El Hierro and the summit cone of Teide volcano to compare these value to previous data.

The two selected students for this programme will collaborate with field and lab work related to the INVOLCAN’s diffuse volcanic degassing monitoring of El Hierro volcanic system and the summit cone of Teide volcano (Tenerife), Canary Islands.

During this program students will learn how to:

  • perform in-situ soil CO2 efflux measurements
  • collect soil gas samples for chemical and isotopic analysis
  • apply statistical-graphical analysis on the diffuse CO2 degassing survey data
  • estimate the total diffuse CO2 emission from El Hierro volcanic system using Gaussian simulations
  • perform chemical analysis of the collected soil gas samples by means of micro-chromatography (microGC) and quadrupole mass spectrometry (QMS)

This programme begins and ends in Tenerife – GeoTenerife will organise transfers to and from El Hierro during the programme.