Application of diffuse degassing measurements to map permeable fault structures across geothermal systems

The project is based on a Memorandum of Understanding that was signed 09/2015 between GFZ and GNS Science. The objective of this project is to improve fault zone analysis for the exploration of geothermal systems. It combines two technical approaches of diffuse degassing and emanation measurements at the Earth’s surface. Both approaches were independently developed over the past few years by the GFZ and GNS Science.

In the frame of field tests, existing technologies will be compared and improved for their applicability in exploration of geothermal systems. New Zealand’s TVZ, with its high-enthalpy geothermal systems, is an ideal study region for further improvement and adaptation of these approaches. Geothermal energy contributes ca. 17% of New Zealand’s electricity generation, and is a key strategic national asset. This collaborative project will contribute to better understanding of these resources and elsewhere.


Mazot, A., Rae, A., Jentsch, A., 2014. Detecting diffuse CO2 emissions along Ngapouri Fault using a Tunable Diode Laser. Proceedings 36th NZ geothermal workshop, 24.-26. November 2014, Auckland, New Zealand.

  • Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences
  • GNS

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