During the ICC 2014, we had the opportunity to identify mineral scale formation in geothermal pipes, especially calcium carbonate. This mineral is formed inside the pipes because of the high content of calcium and dissolved carbon dioxide in the geothermal fluid. As the geothermal fluid ascents to the surface, the fluid might boil and causes the carbon dioxide partial pressure to decrease, so consequently the fluid might lead to supersaturation and calcite might precipitate.
During our hiking trip, we had also the opportunity to appreciate different minerals, rich in sulphur and iron oxide, as well as pyroclastic deposits from the eruption of the Eyjafjallajokull volcano in 2010.
Here are some pictures to appreciate the diversity of the minerals in Iceland!