2 documents found, page 1 of 1
Crustal Imaging of Portugal Mainland Using Magnetotelluric Data
Baltazar‐Soares, P.; Martínez‐Moreno, F. J.; Ribeiro, J. Alves; Monteiro Santos, F. A.; Ribeiro, P.; Pais, M. A.; Mateus, A.; Pous, J.The comprehensive mapping of resistivities in depth and its interpretation is of great importance to unravel the electrical properties of deep-seated rocks, providing significant insights into the structure of the crust. The first 3D resistivity model for Portugal mainland is here reported using data from 31 broadband MT soundings spaced 50 × 50 km apart. The model shows large crustal volumes with contrasting r...
Investigating collapse structures in oceanic islands using magnetotelluric surv...
Martínez-Moreno, F.J.; Monteiro Santos, Fernando Acácio; Madeira, José; Pous, J.; Bernardo, I.; Soares, A.; Esteves, M.; Adão, F.; Ribeiro, J.One of the most remarkable natural events on Earth are the large lateral flank collapses of oceanic volcanoes, involving volumes of rock exceeding tens of km3. These collapses are relatively frequent in recent geological times as supported by evidence found in the geomorphology of volcanic island edifices and associated debris flows deposited on the proximal ocean floor. The Island of Fogo in the Cape Verde arc...