@Article{PadilhaSaBaViPáFu:2021:MaEvRh,
               author = "Padilha, Antonio Lopes and Santos Matos, Andrea Cristina Lima dos 
                         and Batista, Joelson C. and Vitorello, {\'{\I}}caro and 
                         P{\'a}dua, Marcelo Banik de and Fuck, Reinhardt A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal 
                         da Bahia (UFBA)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade de Bras{\'{\i}}lia (UnB)}",
                title = "Magnetotelluric evidence for a Rhyacian suture zone hidden 
                         underneath the Serid{\'o} belt, Borborema Province, Northeastern 
                         Brazil",
              journal = "Precambrian Research",
                 year = "2021",
               volume = "365",
                pages = "e106413",
                month = "Oct.",
             keywords = "Borborema Province, Magnetotellurics, Rhyacian orogenic event, 
                         Serid{\'o} belt, Suture zone.",
             abstract = "The Borborema Province is a complex orogenic system in northeast 
                         Brazil, whose current structural configuration is associated with 
                         the late Neoproterozoic-early Phanerozoic Brasiliano/Pan-African 
                         Orogeny. Magnetotelluric (MT) data were collected along four 
                         linear profiles across the northeastern corner of the province to 
                         assess the regional deep electrical resistivity structure. The 
                         site distribution is non-ideal for 3-D modeling, but 
                         dimensionality analysis showed that the data are dominated by 3-D 
                         effects. The model resulting from the 3-D inversion was critically 
                         evaluated for robustness and was found to provide a coherent view 
                         of the regional structure. A major crustal conductivity anomaly 
                         was modeled beneath Neoproterozoic supracrustal rocks of the 
                         Serid{\'o} belt and this anomaly deepens to upper mantle depths 
                         in the northwest direction. Considering independent geophysical 
                         information and the geometry and location of the conductor, it 
                         likely reflects remnants of a northwest-directed subduction zone 
                         with enhanced conductivity associated with interconnected 
                         magnetite along the suture/shear zone. Constrained by geochemical 
                         data, it is proposed that subduction occurred during the Rhyacian 
                         orogenic event and since then became a key pre-existing 
                         intra-basement mechanical weakness, prone to concentrate 
                         tectonomagmatic events. Its reactivation during several episodes 
                         of extension and compression in the Borborema Province was linked 
                         to the nucleation of the original Serid{\'o} rift basin 
                         (pre-Brasiliano), emplacement of mineralized bodies and crustal 
                         deformation in the Serid{\'o} belt (Brasiliano), and tectonic 
                         control for volcanics erupted during the Cenozoic 
                         (post-Brasiliano). All these processes after the Rhyacian 
                         collision in this sector of the province took place in an 
                         intracontinental setting.",
                  doi = "10.1016/j.precamres.2021.106413",
                  url = "http://dx.doi.org/10.1016/j.precamres.2021.106413",
                 issn = "0301-9268",
             language = "en",
           targetfile = "padilha_magnetotelluric.pdf",
        urlaccessdate = "31 maio 2024"
}