Tectonic relationships between the Paleozoic basement and the Mesozoic cover succession in the northern Dora-Maira Massif (Susa Valley, Western Alps)

A key insight into the multistage tectonic evolution of orogenic belts emerges from the northern Dora-Maira Massif, specifically within the UNESCO World Heritage Site at Susa. The study reveals that the Bussoleno Detachment Shear Zone, acting as a critical basement-cover interface, likely originated in the Early Triassic and localized deformation, predating Alpine polyphase deformation. This zone, along with the ophiolite-bearing Foresto Shear Zone, was deformed through four main phases (D1 to D4), with the early tectonic setting established during subduction-related D1 phase. The research utilizes a 1:5,000 scale geological map to elucidate these complex tectonic relationships, offering a deeper understanding of how detachment zones influence orogenic processes.

Balestro, G., Gattiglio, M., Roà, M., & Festa, A. (2025). Tectonic relationships between the Paleozoic basement and the Mesozoic cover succession in the northern Dora-Maira Massif (Susa Valley, Western Alps). Journal of Maps, 21(1). https://doi.org/10.1080/17445647.2025.2451785