@Article{BolognaEgbPadPádVit:2017:3DInCo,
author = "Bologna, Mauricio S. and Egbert, Gary D. and Padilha, Antonio
Lopes and P{\'a}dua, Marcelo Banik de and Vitorello,
{\'{\I}}caro",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Oregon State
University} and {Instituto Nacional de Pesquisas Espaciais (INPE)}
and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "3-D inversion of complex magnetotelluric data from an
Archean-Proterozoic terrain in northeastern S{\~a}o Francisco
Craton, Brazil",
journal = "Geophysical Journal International",
year = "2017",
volume = "210",
pages = "1545--1559",
note = "{Setores de Atividade: Pesquisa e desenvolvimento
cient{\'{\i}}fico.}",
keywords = "Indu{\c{c}}{\~a}o Eletromagn{\'e}tica Terrestre, Invers{\~a}o
3-D, Cr{\'a}ton do S{\~a}o Francisco, Bloco Serrinha.",
abstract = "We present a magnetotelluric (MT) study in the northeastern part
of the S{\~a}o Francisco Craton that encompasses an
Archean-Proterozoic terrain, the Serrinha Block, breached by a
rift basin developed mostly in Early Cretaceous times during the
opening of the South Atlantic Ocean. Even though the MT sites are
regularly spaced, the profiles have different orientations from
one another, making the data distribution over the area highly
uneven and therefore non-ideal for 3-D modeling. However, the data
set is very complex, with dimensionality analysis indicating
prevalence of 3-D geoelectric structure. Results from 3-D
inversion are evaluated for robustness and potentiality for
yielding tectonic information. At upper crustal depths, the
resulting 3-D model is coherent with surface geology, whereas at
mid and lower crustal depths more cryptic structures are revealed,
likely of Palaeoproterozoic age. The most striking features in the
model are several strong (\∼1 \Ω\⋅m) crustal
conductors beneath the central part of the Serrinha Block, which
we attribute to a Palaeoproterozoic oceanic plate subduction and
arc-continent collision event involving the Rio Itapicuru
Greenstone Belt and the basement of the Serrinha Block. The
west-dipping geometry of these conductors provides a constraint on
subduction polarity and gives support to tectonic evolutionary
models proposing that the Rio Itapicuru Belt was formed in an
island arc environment.",
doi = "10.1093/gji/ggx261",
url = "http://dx.doi.org/10.1093/gji/ggx261",
issn = "0956-540X",
label = "lattes: 0842543237562135 3 BolognaEgbPadP{\'a}dVit:2017:3DInCo",
language = "en",
targetfile = "bologna_3d.pdf",
urlaccessdate = "27 abr. 2024"
}