Magmatic plumbing systems are the subterranean roots of any volcanic systems on Earth and other planets. They are built through the succession of magma transfer within the lithosphere and correspond to intricate 3D networks of magmatic intrusions, ranging from horizontal sills to vertical dikes. Monogenetic basaltic volcanism expresses this definition extremely well. In addition to have the formation of a new volcanic edifice during each new eruption within their field, their plumbing systems show a large occurrence of sills within the crust' subsurface. Basaltic magmas are believed to be controlled by the orientation of the stress field, however the physical and structural controls affecting such stress field and therefore the propagation direction of magmas remains to date a matter of debate. Using analogue and numerical models informed from field data and remote sensing analyses, I quantified how pre-existing fractures and volcanic eruptive activity act on the reorientation of magmas within the crust. These results provide new insights into our understanding of the development of monogenetic volcanic fields and volcanic plumbing systems.

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