@Article{PadilhaTrivVitoCost:1991:GeCoTe,
               author = "Padilha, Antonio Lopes and Trivedi, Nalin Babulal and Vitorello, 
                         Icaro and Costa, Jos{\'e} Marques da",
                title = "Geophysical contraints on tectonic models of the Taubate Basin 
                         southeastern Brazil",
              journal = "Tectonophysics",
                 year = "1991",
               volume = "196",
               number = "1-2",
                pages = "157--172",
                month = "Set.",
             keywords = "GEOFISICA ESPACIAL.",
             abstract = "Magnetotelluric, gravity and geothermal flux data are analysed to 
                         constrain the tectonic evolution of the Taubate Basin, a SW-NE 20 
                         km wide and 170 km long rift-like Tertiary basin in southeastern 
                         Brazil. The basin is characterized by half-grabens and contains up 
                         to 1000 m of sediments cut by normal faults. The magnetotelluric 
                         measurements show the presence of two layers: an upper highly 
                         conductive one (less than 10 omega m from 1-D inversions), 
                         associated with Tertiary sediments, and an extremely resistive 
                         (more than 10 000 omega m) lower layer, related to the crystalline 
                         basement. Gravity anomalies in the region are ascribed to both 
                         near-surface sources, sediments and granites, and a deep-seated 
                         source associated with crustal thinning towards the continental 
                         margin. Available geothermal flux values within the basin are 
                         anomalously high; however, they have probably been affected by 
                         convective transport because they were determined in water 
                         boreholes. These results suggest a stable thermal regime at 
                         present and, viewed together with the absence of magmatism and 
                         thermal subsidence, indicate that the mechanism related to the 
                         basin formation did not originate a deep-seated thermal anomaly in 
                         the region. The event can be seen as a shallow one, involving a 
                         small area in the upper part of the crust. The region can be 
                         characterized typically as a strike-slip mobile zone, with 
                         horizontal displacements between juxtaposed blocks. A 
                         transtensional model is suggested for the Taubate Basin to explain 
                         some of its principal geological features.",
                 issn = "0040-1951 and 1879-3266",
                label = "7202",
           targetfile = "1991_padilha.pdf",
        urlaccessdate = "27 abr. 2024"
}