@Article{BezerraCMSMRBSN:2020:PoStFi,
author = "Bezerra, Francisco H. and Castro, David L. de and Maia, Rubson P.
and Sousa, Maria O. L. and Moura Lima, Elissandra N. and Rossetti,
Dilce de F{\'a}tima and Bertotti, Giovanni and Souza, Zorano S.
and Nogueira, Francisco C. C.",
affiliation = "{Universidade Federal do Rio Grande do Norte (UFRN)} and
{Universidade Federal do Rio Grande do Norte (UFRN)} and
{Universidade Federal do Cear{\'a} (UFC)} and {Universidade
Federal do Rio Grande do Norte (UFRN)} and {Universidade Federal
de Campina Grande (UFCG)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Delft University of Technology} and
{Universidade Federal do Rio Grande do Norte (UFRN)} and
{Universidade Federal de Campina Grande (UFCG)}",
title = "Postrift stress field inversion in the Potiguar Basin, Brazil –
Implications for petroleum systems and evolution of the equatorial
margin of South America",
journal = "Marine and Petroleum Geology",
year = "2020",
volume = "111",
pages = "88--104",
month = "Jan.",
keywords = "Neotectonics, Basin inversion, Stress field, Equatorial margin,
Tectonic uplift.",
abstract = "Rifting and related normal stress regime in the equatorial
continental margin of Brazil ceased during the Late Cretaceous,
when the stress regimes in eastern South America and West Africa
changed to induce strike-slip or reverse motion. In this study, we
explore the postrift tectonic, geomorphic, magmatic, and
sedimentary responses to stress changes using the Potiguar Basin,
the easternmost basin in the equatorial margin of Brazil, as a
case study. We use field and topographic data, 2D seismic
reflection lines, vertical electric soundings, and
geochronological and borehole data to constrain the stress
evolution of the Potiguar Basin from the Late Cretaceous to the
Quaternary, discussing the role of basin inversion on
sedimentation and landforms. Our results indicate the presence of
two strike-slip stress regimes after rifting. The first stress
field (SF1) occurred from Late Cretaceous to the middle Miocene
and consisted of a N-S-oriented maximum subhorizontal compression
and an E-W-oriented extension. The second stress field (SF2) took
place from the middle Miocene to the present day and included
subhorizontal E-W to NW-SE compression combined with N-S and NE-SW
subhorizontal extension. Emplacement of volcanic rocks occurred
along transtensional faults, with a principal peak during SF1 at
20-30 Ma and a subordinate peak during SF2 at 5-10 Ma, In response
to shortening during SF2, a 70-kin-long and 50-km-wide dome
formed, where marine Miocene strata were uplifted to similar to
250 m asl. This uplift induced the displacement of alluvial
channels away from the dome. Anticlines formed by transpression
along the main NE-SW-striking faults during both SF1 and ST2 acted
as traps in the petroleum system. Similar shifts and stress field
inversions documented in other areas of the Brazilian continental
margin are consistent with the Neogene rise of the Andes and may
have implications for reconstructing the tectonic history of the
Equatorial Atlantic margin of South America.",
doi = "10.1016/j.marpetgeo.2019.08.001",
url = "http://dx.doi.org/10.1016/j.marpetgeo.2019.08.001",
issn = "0264-8172",
language = "en",
targetfile = "bezerra_postrif.pdf",
urlaccessdate = "27 abr. 2024"
}