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"Shallow crustal density distribution and its evolution at the Krafla volcanic system"
This project was carried out as part of the IMPROVE (ETN) and focused on 3 main objectives:
1) Modelling the shallow subsurface density distribution.
2) Investigating the short- and long-term evolution of the Krafla volcanic system.
3) Developing a Finite Element Model of the magmatic system during the Krafla Fires.
I conducted three static and dynamic gravity campaings across the Krafla volcanic system and compiled them with over 50 years of legacy gravity measurements.
This dataset enabled the development of a new high-resolution 3D model of the magmatic and hydrothermal system architecture within the upper 3 km of the crust. It also allowed us to reconstruct the evolution of the magmatic and hydrothermal systems over the past five decades, providing new insights into the active shallow magmatic processes associated with the Krafla Fires.
Krafla caldera density contrast model. Horizontal sections extend from the surface to 3 km bsl. Profiles I-III traverse vertical sections extending N-S, W-E, and oblique profiles across the IDDP-1 well. Derivative analysis of the Second Vertical Derivative (SVD) and the Total Horizontal Derivative (THDR) follows the II-II' profile in a W-E orientation.
Publications:
Martinez‐Garcia, A., Gottsmann, J., Wookey, J., Rust, A., Gudmundsson, M. T., & Lavallée, Y. (2025). 3D model of the shallow crustal density distribution of the Krafla volcanic system in iceland. Journal of Geophysical Research: Solid Earth, 130(7), e2025JB031670.
Martinez-Garcia, A., Gottsmann, J., Wookey, J., Rust, A., Yang, Y., Sigmundsson, F., & Gudmundsson, M.T. (2025). Structural and Magmatic Characterization of the Krafla Volcanic System with Finite-Element Modelling. (Manuscript in preparation)
Martinez-Garcia, A., Gottsmann, J., Wookey, J., Rust, A. (2025). Long-term impact of geothermal exploitation and reinjection in the Krafla Volcanic System. Geothermics. (Manuscript in preparation)
Status: completed
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