The need to reduce greenhouse gas emissions is an important issue facing society at present. Appropriately designed, district-scale geothermal heating systems can satisfy society’s “energy trilemma”, by providing a secure energy supply that is economical and environmentally sustainable. The ability to use geothermal resources to generate heat in urban areas where the demand is greatest has the potential to significantly reduce our reliance on fossil fuels, and to support national and EU sustainable energy policies. Potential deep geothermal resources in challenging, lower-enthalpy EU settings remain poorly understood and largely untapped.
The GEO-URBAN project aims to explore the potential for low enthalpy geothermal energy in urban environments. The project will focus on two target locations – Dublin, Ireland and Vallès, Catalonia, Spain – and will provide a feasibility analysis for the commercial development of deep geothermal resources in these regions.
GEO-URBAN will evaluate novel geophysical exploration and modelling techniques for urban areas, which will be applied at both test locations. Geophysical data collected during GEO-URBAN will feed into a commercialisation strategy for the exploitation of deep geothermal resources in challenging urban environments, which will draw upon existing knowledge and experience from partners in Denmark, where the deep geothermal heat industry is more established. This knowledge transfer will be reciprocated by the cross-transfer of detailed geological and hydrological data on fractured limestone lithologies in Ireland, which are of interest as ultra-deep geothermal targets in Denmark and elsewhere in Europe.
PACIFIC is a research project in the field of mineral exploration. The project aims at developing new exploration techniques that respect the environment and incur relatively low costs. Launched in June 2018, the project has received a funding of €3.2 million from the European Union’s Horizon 2020 research and innovation programme. It is set to run for 36 months and is coordinated by Université Grenoble Alpes (UGA).
The Geophysics Section at the Dublin Institute for Advanced Studies (DIAS): (i) plays a role in the development of new methods for the extraction of reflected waves
(ii) plays a role in the extraction, processing and interpretation of reflected phases from the passive experiment at Marathon
(iii) undertakes full wavefield numerical simulations for testing new methodologies in body wave extraction.
For more infomation go to https://www.pacific-h2020.eu/
The European Network of Observatories and Research Infrastructures for Volcanology (EUROVOLC) is a H2020 Research and Innovation Project of the European Commission. It will construct an integrated and harmonized European volcanological community able to fully support, exploit and build-upon existing and emerging national and pan-European research infrastructures, including e-Infrastructures of the European Supersite volcanoes. The harmonization includes linking scientists and stakeholders and connecting still isolated volcanological infrastructures located at in situ volcano observatories (VO) and volcanological research institutions (VRIs). For more information please click here.
DIAS is a full partner of the EUROVOLC project.
During Autumn 2018, the SEA-SEIS (Structure, Evolution And Seismicity of the Irish offshore) project recently deployed 18 Ocean Bottom Seismometers in the North Atlantic. Led by Prof. Sergei Lebedev, his research group intend to build cutting edge tomographic images of the geology beneath the North Atlantic to gain a better understanding of the geological structure and its evolution. For more info www.sea-seis.ie
iMARL the “Insitu Marine Laboratory for Geosystems Research” is a network of various types of ocean floor located sensors, hosted by DIAS Geophysics. It comprises broadband Ocean Bottom Seismographs (OBS), broadband acoustic sensors, and sensors for measuring absolute water pressure & temperature at the ocean floor. A system capable of detecting tsunamis also forms part of the infrastructure. The sensor pool is largely mobile and can, in principle, be deployed around the world. However the current focus is on the NE Atlantic, offshore Ireland. One instrument will be fixed and will ultimately become a real-time sensing offshore element of the Irish National Seismic Network (www.insn.ie). Through an award to the Dublin Institute for Advanced Studies (DIAS) the iMARL infrastructure is funded by Science Foundation Ireland (SFI) with support from the Geological Survey, Ireland. For more info www.imarl.ie
Magnetotelluric (MT) fieldwork on Sao Miguel, Azores (Portugal)
During September 2018, the electromagnetic group of DIAS Geophysics completed a large scale field campaign on Fogo Volcano and Furnas Volcano on Sao Miguel to investigate the geo-electrical structure beneath both volcanic systems as a way of understanding their formation and current processes and also assessing the geothermal potential of the island.
This international project led by DIAS Geophysics collaborated with the University of Azores, University of Frankfurt and University of Lisbon.
HERSK (HEkla Real-time Seismic monitoring networK)
An innovative, real-time monitoring system for Hekla Volcano in Iceland was installed by DIAS Geophysics in 2018 with the Iceland Met Office (IMO) as the local key partner. Hekla is one of the most active and dangerous volcanoes in Iceland and currently erupts about every 10 years. The next Hekla eruption is considered overdue and could be hazardous to air travel.
Hekla is seismically surprisingly quiet, resulting so far in a dangerously short pre-eruption warning time of only around one hour. The extreme weather environment has been a barrier to year-round real-time measurements, here we have developed a new cabled system concept to year-round real-time monitoring. This will lower the detection threshold of seismic events significantly. The result will be a better scientific understanding of the processes driving the evolution of pre-eruptive seismicity at Hekla and a substantial improvement in early warning capability.
The HERSK project is lead by Martin Möllhoff in collaboration with Chris Bean and has been awarded internationally peer reviewed Geological Survey Ireland (GSI) funding.
A poster about the HERSK project can be accessed at http://dx.doi.org/10.13140/RG.2.2.27536.25600
Integrated geophysical and geological study of the Porcupine Basin
Researchers at DIAS Geophysics Section currently focuses on the evolution of the Porcupine Seabight and Rockall Plateau in the Irish Atlantic offshore The researchers use geophysical (wide angle and multichannel seismic data, magnetics, gravity) and geological (borehole) data to image rocks below the seafloor (second image below) and understand how these areas formed through geological time. This includes looking at the petrological nature of the crust and uppermost mantle, the sedimentation patterns of offshore basins and the distribution of volcanism in the Irish offshore. This research helps evaluate hydrocarbon potential in the region and hence contributes to the future energy security and economic well-being of Ireland.
IGUANA: Investigating Geophysical Unrest At Sierra Negra
Sierra Negra volcano is one of the most active volcanoes on the Galapagos Islands, approximately 1,000 km west of continental Ecuador. The Galapagos Islands are the manifestation of a mantle hot spot under the eastward-moving Nazca plate. Active volcanism is concentrated on the island of Isabela, where Sierra Negra volcano is located. Since March 2017, an increase of seismicity was recorded at one of the permanent seismic stations in the network of IGEPN in Ecuador. The increase ended on the 26th June 2018 when the volcano erupted. This sequence of events was recorded by the local network of 14 broadband seismic stations that we installed as part of the IGUANA project. Three stations are located inside the caldera to record near-field effects of the seismic waves, the other stations are located around the caldera.
The main aims of the project are:
- to investigate the triggering response to dynamic stress perturbations
- to provide a high-resolution spatio-temporal distribution of volcano-tectonic events
- to determine what mechanisms caused the tremor observed preceding the eruption
The project is funded by the UK Natural Environment Research Council (NERC) and is a collaboration between the School of GeoSciences, University of Edinburgh, the Dublin Institute for Advanced Studies (DIAS), the Instituto Geofisico at the Escuela Politecnica Nacional (IGEPN) in Quito, Ecuador, and the Galapagos National Park.
Ocean and Tidal Modelling
Oceans play an important role in the Earth system. At DIAS Geophysics, ongoing research focuses on wind and buoyancy driven circulations as well as tidally driven circulations within our oceans. Collaboration with the European Space Agency (ESA) Swarm satellite mission is investigating the magnetic signatures of the ocean circulation systems. The motivation is that the ocean-induced magnetic field may provide a greater understanding of ocean circulations.
G.O.THERM.3D: a 3D atlas of temperature in Ireland’s subsurface
With the backdrop of climate change and Ireland’s reliance on fossil fuels, the need to exploit Ireland’s potential for secure, reliable and diverse indigenous renewable energy supply is immediate. The contribution of geothermal energy to the required energy transformation of Ireland has fallen behind targets and is far from realising its full potential. The G.O.THERM.3D project at the Dublin Institute for Advanced Studies proposes a novel approach to quantify and map temperature in Ireland’s crust in an integrated approach that simultaneously accounts for multiple geophysical and petrological datasets, where key rock properties are thermodynamically computed based on the temperature and bulk rock composition. Based on this integrative approach a new 3D temperature atlas for Ireland’s crust will be built with the aim of making it publicly available on an interactive online platform. It is envisaged that an interactive 3D temperature model would increase public awareness of geothermal energy, focus and encourage geothermal resource exploration and assist in the development of public policy on geothermal energy exploration, mapping, planning and exploitation.