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Diffuse CO2 degassing survey, NERZ volcano, Tenerife

June
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 emanations (diffuse degassing). The surface dynamics of gas emissions are usually controlled by local volcano-tectonics and hydrology, as the permeable tectonic structures are the main pathways for the transport of gases to the surface.

After water vapour, CO2 is the major gas species volcanic fluids and magmas. It is therefore an effective tracer of subsurface magma degassing. Diffuse CO2 emission on volcanoes has played an important role in volcano monitoring. The goal of this study is to evaluate 2019 diffuse CO2 emissions from Tenerife NERZ volcano and compare this 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 Tenerife North–East Rift Zone (NERZ) volcano, Canary Islands. The field work will take place from June 10 to 28, and the lab work will take place at our geochemical lab in Tenerife from July 1 to 4.

During this programme 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  the Tenerife North–East Rift Zone (NERZ) volcano using Gaussian simulations
  • perform chemical analysis of the collected soil gas samples by means of micro-chromatography (microGC) and quadrupole mass spectrometry (QMS)