@Article{Rossetti:2010:TeCoSt,
author = "Rossetti, Dilce de F{\'a}tima",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Tectonic control on the stratigraphy framework of late pleistocene
and holocene deposits in Maraj{\'o} island, state of Par{\'a},
eastern Amazonia",
journal = "Anais da Academia Brasileira de Ci{\^e}ncias",
year = "2010",
volume = "82",
number = "2",
pages = "439--450",
note = "{DOAJ Directory of Open Access Journals Free}",
keywords = "Amaz{\^o}nia, tect{\^o}nica, Quatern{\'a}rio, arcabou{\c{c}}o
estratigr{\'a}fico, data{\c{c}}{\~a}o radiocarbono,
sedimenta{\c{c}}{\~a}o, tectonics, Quaternary, stratigraphic
framework, radiocarbon dating, sedimentation.",
abstract = "A vis{\~a}o tradicional de que a Amaz{\^o}nia brasileira
localiza-se em ma {\'a}rea tectonicamente est{\'a}vel desde o
Cret{\'a}ceo est{\'a} mudando perante a crescente
documenta{\c{c}}{\~a}o de reativa{\c{c}}{\~o}es de falha,
at{\'e} mesmo durante o Holoceno. Como o registro sedimentar
respondeu a esses eventos {\'e} um tema que permanece por ser
abordado com base em dados de campo. Este trabalho enfatiza a
correla{\c{c}}{\~a}o estratigr{\'a}fica de dep{\'o}sitos
quatern{\'a}rios tardios no leste da Ilha do Maraj{\'o}, com o
objetivo de demonstrar a import{\^a}ncia de
reativa{\c{c}}{\~o}es de falha na origem e
preserva{\c{c}}{\~a}o desses dep{\'o}sitos. Apesar da
localiza{\c{c}}{\~a}o em {\'a}rea de plataforma de uma margem
continental passiva, tr{\^e}s unidades estratigr{\'a}ficas
estudadas mostram significantes rejeitos verticais, que definem
dois depocentros, explicados por deslocamentos tect{\^o}nicos.
Esta interpreta{\c{c}}{\~a}o {\'e} refor{\c{c}}ada por
v{\'a}rias fei{\c{c}}{\~o}es morfoestruturais relacionadas com
falhas localizadas entre os po{\c{c}}os estudados. Sem
influ{\^e}ncia tect{\^o}nica, a preserva{\c{c}}{\~a}o de
sedimentos nesse terreno, caracteristicamente plano, seria
impercept{\'{\i}}vel. Os resultados do presente trabalho motivam
a procurar outras {\'a}reas tectonicamente influenciadas da
Amaz{\^o}nia, que possam ter atuado como s{\'{\i}}tios de
acomoda{\c{c}}{\~a}o de sedimentos durante o Quatern{\'a}rio
tardio. Esses registros sedimentares t{\^e}m grande potencial de
serem fontes de informa{\c{c}}{\~o}es valiosas para auxiliar na
reconstru{\c{c}}{\~a}o de eventos geol{\'o}gicos
quatern{\'a}rios no norte do Brasil. ABSTRACT: The traditional
view that the Brazilian Amazonia is located in a tectonically
stable area since the Cretaceous is changing in front of the
increasing documentation of fault reactivations even during the
Holocene. How the sedimentary record has responded to these events
is an issue that remains to be approached with basis on field
data. This work focuses on the stratigraphic correlation of late
Quaternary deposits from eastern Maraj{\'o} Island, with the goal
of demonstrating the role of fault reactivation on the origin and
preservation of these deposits. Despite the location in a stable
platform of a continental passive margin, three studied
stratigraphic units display significant vertical offsets that
define two depocenters that are better explained through tectonic
displacements. This interpretation is reinforced by several
morphostructural features related to faults that occur between the
studied drills. Without the influence of tectonics, sediment
preservation in this characteristically low-lying terrain would
have been negligible. The results of the present work motivate to
look for other tectonically-influenced areas in Amazonia, which
similarly might have acted as sites for sediment accommodation
during the late Quaternary. These sedimentary records have great
potential to be the source of valuable information for
reconstructing Quaternary geological events in Northern Brazil.",
doi = "10.1590/S0001-37652010000200020",
url = "http://dx.doi.org/10.1590/S0001-37652010000200020",
issn = "0001-3765",
label = "lattes: 0307721738107549 1 Rossetti:2010:TECOST",
language = "en",
targetfile = "20.pdf",
urlaccessdate = "04 maio 2024"
}