Modification of the magnetic mineralogy in basalts due to fluid-rock interactions in a high-temperature geothermal system (Krafla, Iceland)

• Published in: Geophysical Journal International
• Main Authors: Oliva-Urcia, Belén, Kontny, Agnes, Vahle, Carsten, Schleicher, Anja M.
• Format: Text
• Language: English
• Published: Oxford University Press 2011
• Subjects: Geomagnetism; Rock Magnetism and Palaeomagnetism; Krafla; Iceland
• Online Access: http://gji.oxfordjournals.org/cgi/content/short/186/1/155; https://doi.org/10.1111/j.1365-246X.2011.05029.x

Active high-temperature (>150 °C) geothermal areas like the Krafla caldera, NE-Iceland, often show distinct magnetic lows in aeromagnetic anomaly maps suggesting a destruction of magnetic minerals by hydrothermal activity. The main alteration processes in such an environment are low-temperature o...