| Title | Geothermal Exploration in Arskogsstrond, N-Iceland |
|---|---|
| Authors | Olafur G. Flovenz, Rogna Karlsdottir, Kristjan Saemundsson, Ragna Karlsdottir, Omar Bjarki Smarason, Hjalmar Eysteinsson, Grimur Bjornsson, Magnus Olafsson and Thornsteinn Bjornsso |
| Year | 2000 |
| Conference | World Geothermal Congress |
| Keywords | Exploration, seismicity, fracture mapping, magnetic measurements, temperature gradient. |
| Abstract | Arskogsstrond is a small fishing society in N-Iceland, consisting of two small villages and a service centre. The distance between these places is 2-4 km. No known geothermal resource was sufficiently close to the villages to allow for the building of an economical geothermal district heating service. In 1996-97 geothermal prospecting was carried out within 5 km radius of the villages. Analysis of microseismic activity in the area and lineaments on aerial photos, led to the discovery of an active NNW trending fracture system crossing the prospect area. Furthermore, shallow geothermal gradient wells and a ground magnetic survey indicated a geothermal system, where a NNE trending dyke swarm intersects with the NNW striking fracture system. Drilling of a 430m deep well, reached a feed zone below 400m depth which yields about 40 l/s of 74?C water, suitable for direct use, with few meters drawdown and in aquifer pressure. |