The Reykholt and Húsafell Geothermal fields in Borgarfjördur- a Geochemical Study

Several highly active geothermal fields are located in the Borgarfjordur region, W Iceland. Among them is the largest low-temperature field in Iceland, the Reykholt geothermal field yielding over 400 l/s of boiling water or at temperatures near to boiling. The reservoir temperatures at depth range up to 150 °C. The adjacent Husafell geothermal field is cooler, with reservoir temperatures about 80 °C. Several geochemical exploration campaigns have been performed in the area during the last sixty years giving exellent opportunity to review changes in an area where the utilization has been exclusively from free flowing springs and wells. In the present campaign about 30 trace elements, stable isotopes, 14 C and Rn have been measured in addition to the main element concentration