Skip to Main content Skip to Navigation
New interface
Journal articles

A large magmatic sill complex beneath the Toba caldera

Abstract : An understanding of the formation of large magmatic reservoirs is a key issue for the evaluation of possible strong volcanic eruptions in the future. We estimated the size and level of maturity of one of the largest volcanic reservoirs, based on radial seismic anisotropy. We used ambient-noise seismic tomography below the Toba caldera (in northern Sumatra) to observe the anisotropy that we interpret as the expression of a fine-scale layering caused by the presence of many partially molten sills in the crust below 7 kilometers. This result demonstrates that the magmatic reservoirs of present (non-eroded) supervolcanoes can be formed as large sill complexes and supports the concept of the long-term incremental evolution of magma bodies that lead to the largest volcanic eruptions.
Keywords : GEOCHEM PHYS
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03581067
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Saturday, February 19, 2022 - 7:47:39 AM
Last modification on : Friday, October 21, 2022 - 3:32:40 PM

Identifiers

Citation

K. Jaxybulatov, N. M. Shapiro, I. Koulakov, A. Mordret, M. Landès, et al.. A large magmatic sill complex beneath the Toba caldera. Science, 2014, 346, pp.617-619. ⟨10.1126/science.1258582⟩. ⟨insu-03581067⟩

Share

Metrics

Record views

8