@InProceedings{PadilhaVitoPaulFuck:2019:GeCoNo,
               author = "Padilha, Ant{\^o}nio Lopes and Vitorello, {\'{\I}}caro and 
                         Paula, Marcelo Banik de and Fuck, Reinhardt A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade de Bras{\'{\i}}lia 
                         (UnB)}",
                title = "Geoelectric Complexity of the Northern S{\~a}o Francisco Cratonic 
                         Lithosphere, Central South America, Revealed by Magnetotellurics",
                 year = "2019",
         organization = "AGU Fall Meeting",
             abstract = "In the northern S{\~a}o Francisco Craton, central South America, 
                         extensive Proterozoic and Phanerozoic sedimentary cover and lack 
                         of deep-probing geophysical surveys have prevented to establish 
                         unequivocally the cratonic character of the 
                         Archean-Paleoproterozoic lithosphere. Broadband and long period 
                         magnetotelluric (MT) soundings were conducted along a 580 km long 
                         east-west profile in this region of the craton. 2D and 3D 
                         inversions show extensive upper crustal horizontal conductors 
                         beneath the intracratonic Irec{\^e} Basin and the Rio Preto 
                         marginal belt, interpreted as associated with a combination of 
                         high porosity and high fluid salinity in the sedimentary package 
                         and fractured metasedimentary rocks at the top of the craton 
                         basement during the Neoproterozoic marginal collision, 
                         respectively. The deepest part of the crust presents pronounced 
                         electrical complexity and heterogeneity, an indication that the 
                         cratonic lithosphere was multiply reworked in the past by 
                         tectonothermal events. Lithospheric resistive blocks bounded by 
                         subvertical major conductive zones are identified. Constrained by 
                         geochemical and isotopic data, these conductive interfaces are 
                         interpreted as cryptic suture zones related to the large-scale 
                         fusion of continents and microcontinents during the 
                         Paleoproterozoic craton assembly. At upper mantle depths, high 
                         conductivities are observed below most of the profile and 
                         interpreted as effects of metasomatism or refertilization 
                         processes with incompatible elements during Paleoproterozoic 
                         subduction processes and subsequent 
                         Mesoproterozoic-to-Neoproterozoic upwelling of deep fluids and 
                         melts.",
  conference-location = "San Francisco, CA",
      conference-year = "09-13 dec.",
             language = "en",
           targetfile = "padilha_geoelectric.pdf",
        urlaccessdate = "24 abr. 2024"
}