Insights into the caldera cycle of the Torfajökull central volcano, South Iceland ...

• Main Author: Moser, Zoe
• Format: Text
• Language: English
• Published: ETH Zurich 2023
• Subjects: Torfajökull; Caldera; Geochemistry; FOS: Earth and related environmental sciences; U-Th dating; info:eu-repo/classification/ddc/550; Earth sciences; Iceland
• Online Access: https://dx.doi.org/10.3929/ethz-b-000661902; http://hdl.handle.net/20.500.11850/661902

Caldera-forming volcanoes can be associated with the highest volcanic hazards on our planet, but also with areas of potential georesources. Understanding the evolution and activity patterns of these magmatic systems is of great interest, both from a risk and economic perspective. From what is currently known, their large volume magmatic reservoirs tend to evolve along a cyclic progression, involving an incubation period, maturation and fermentation, which can result in a caldera-forming eruption, followed by either the death of the system or its recovery. Testing how this cycle applies to different volcanic systems, understanding what causes the death or recovery of the system and finding ways to verify the current stage of a caldera-forming volcano is an important challenge in volcanology. Here, we approach these aspects on Torfajökull, a silicic caldera volcano in South Iceland. We present a geochronological and petrological dataset encompassing pre-caldera to post-caldera eruptions to better constrain the ...