NordMin Workshop “On- and Offshore Exploration and Prospecting in Extreme Nordic Environments: Challenges and Benefits of Finding Exploitable Raw Materials" Summary The 3rd NordMin Workshop was held in Reykjavík, Iceland 23–24 March 2015. The title of the workshop was "On- and Offshore Exploration and Prospecting in Extreme Nordic Environments: Challenges and Benefits of Finding Exploitable Raw Materials". The National Energy Authority (Orkustofnun) was responsible for the workshop, with assistance from Iceland GeoSurvey (ÍSOR) and the Faculty of Earth Sciences, University of Iceland. The workshop was attended by 63 participants from all the five Nordic countries, including Greenland and Faroe Islands, and furthermore from United Kingdom and Germany. The participants came from research institutes, universities, industry, administration agencies and ministries. One day field excursion was given prior to the workshop focusing on the Thormodsdalur gold prospect, geothermal power plants and the geological phenomena of the Reykjanes volcanic zone. The following two day workshop emphasized on- and offshore exploration and prospecting in extreme Nordic environments. The first day involved mostly offshore exploration with lectures covering sulfide deposition within geothermal systems and black smokers on the Mid-Atlantic Ridge and metal deposition in the Baltic Sea. On the second day the focus was on onshore exploration in Fennoscandia, Iceland and Greenland. The main purpose of the workshop was networking of the Nordic participants and the formation of research groups that could pursue further research project applications to relevant grant bodies. Two workgroups were established during the workshop to define two pre-proposals on research and innovation projects. Both of these received grants from NordMin in order to work on full applications to appropriate grant bodies. These were: “Modern and ancient VMS-forming hydrothermal systems”, coordinated by the Iceland GeoSurvey (ÍSOR), along with nine research institutes and universities from Norway, Sweden, Denmark- Greenland, Iceland, Finland and Faroe Islands. “Assessment of undiscovered mineral resources in the Nordic countries and Greenland”, coordinated by the Geological Survey of Finland (GTK), along with geological surveys in Denmark-Greenland, Norway, Sweden and Iceland.