EGU24-10152, updated on 08 Mar 2024
https://doi.org/10.5194/egusphere-egu24-10152
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Exploring the hydrothermal vent field of Milos Island in Aegean Seausing novel radiation instrumentation

Georgios Siltzovalis1, Ioannis Madesis1, Varvara Lagaki1, Theodoros J. Mertzimekis1, Pavlos Krassakis2, Stavroula Kazana3, and Konstantinos Nikolopoulos4
Georgios Siltzovalis et al.
  • 1Department of Physics, National and Kapodistrian University of Athens, Zografou Campus,15784, Athens, Greece
  • 2Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, 15125, Marousi, Greece
  • 3Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15784, Athens, Greece
  • 4Business School, Durham University, DH1 3LB, Durham, United Kingdom

Radioactivity monitoring in the marine environment exhibits various challenges. First and foremost, the water-induced attenuation substantially limits the detection ability and range of the sensors. Additionally, the harshness and remoteness of underwater locations pose significant obstacles to existing technological solutions towards dense and extended radioactivity mapping of the oceans. The highly ambitious EU FET Proactive Research Programme RAMONES (Radioactivity Monitoring in Ocean Ecosystems) is aiming towards overcoming existing limitations by developing and deploying novel underwater radiation-sensing instruments, enabling direct correlation of marine radioactivity with underwater geological and geochemical processes.

The present study will focus on the analysis of experimental data collected during field experiments conducted in the extended hydrothermal vents of Milos, an island located on the south Aegean Sea that is part of the Hellenic Volcanic Arc. The shallow active hydrothermal system of Milos is associated with calc-alkaline volcanic rocks from basaltic andesites to dacites, and rhyolites that have been deposited over several cycles of volcanic activity. Novel portable γ-detectors based on lightweight CdZnTe crystals, were deployed to acquire in situ measurements from coastal locations at the eastern part of the island. Complementary sediment samples were collected to offer baseline NORM (Naturally Occurring Radioactive Material) levels from Milos Island having attracted a lot of attention recently due to its role as a potential geohazards source. These measurements are used to benchmark the γ spectrometers and prepare them for underwater operation aboard autonomous underwater gliders. Collected data will feed a prototype Risk Information System (RIS) titled as POIS2ON (PrOtotype Information System for SOcioecoNomic stakeholders). POIS2ON database will include datasets accompanied by geoinformation to be visualized though NORM levels heat maps, as well as support detailed Monte Carlo simulations to evaluate the radiation doses on local marine ecosystems.

How to cite: Siltzovalis, G., Madesis, I., Lagaki, V., Mertzimekis, T. J., Krassakis, P., Kazana, S., and Nikolopoulos, K.: Exploring the hydrothermal vent field of Milos Island in Aegean Seausing novel radiation instrumentation, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-10152, https://doi.org/10.5194/egusphere-egu24-10152, 2024.

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