@Article{VenezianiSantPara:2004:MoBaDa,
author = "Veneziani, Paulo and Santos, Athos Ribeiro dos and Paradella,
Waldirt Renato",
title = "A Evolu{\c{c}}{\~a}o tectono-estratigr{\'a}fica da
prov{\'{\i}}ncia mineral de Caraj{\'a}s: um modelo com base em
dados de Sensores Remotos Orbitais (SAR-C RADARSAT-1, TM Landsat
-5), Aerogeof{\'{\i}}sica e Dados de Campo",
journal = "Geoci{\^e}ncias",
year = "2004",
volume = "34",
number = "1",
pages = "67--78",
month = "mar.",
keywords = "GEOLOGIA, evolu{\c{c}}{\~a}o, tectono, estratigr{\'a}fia,
Prov{\'{\i}}nvia Mineral de Caraj{\'a}s, radar imageador,
tectonics, stratigraphy, evolution, Caraj{\'a}s Mineral
Province.",
abstract = "Orbital remote sensing images have been used in Caraj{\'a}s
Mineral Province (Brazilian Amazon Region) since the beginning of
the 1990s. The Province, with a heterogeneous relief and almost
totally covered by tropical rainforest, is part of the
Itacai{\'u}nas Shear Belt within the Amazonian Craton. The area
is world-wide known due to its mineral potential. However, from
the tectono-stratigraphic viewpoint it is still problematic due to
several drawbacks such as poor access, physiographic complexity,
and detailed information available only in few isolated sites
(mining, deposits or mineralizations). Spaceborne optical (Landsat
TM) and radar (C-HH RADARSAT-1) imageries and digital integrated
products (RADARSAT-1/Aerialgammaspectrometry) have been
extensively applied for geological mapping purposes in the
Province. Due to their synoptic view coupled with distinct
sensor/terrain geometry allowing the extraction of indirect
geological information, these kinds of remotely sensed products
have been interpreted based on specific morphostructural
criteria., with the following objectives: (1) to integrate
previous and disperse geological data; (2) to explore the
identification of regional structures and distinct
tectonic-stratigraphic regimes on a large mapping scale; (3) to
distinguish different motion phases along the Itacai{\'u}nas
Shear Belt (WNW-ESE trending) and characterize related rock
forming and deformation events. Fieldwork campaigns carried out
along selected profiles have provided new information. These
findings were integrated with previous data and have allowed the
production of a new tectono-stratigraphic map for the Province
(1:250,000 scale). In addition, it was also possible to
characterize three ductile and brittle transpression phases,
locally transtensive, with Archean/Neoproterozoic ages. It was
also observed extensive reactivations with pulses at the end of
the Proterozoic and beginning of the Palaeozoic, at the Mesozoic
and at the Tertiary. Volcanism, sedimentation, granitogenesis,
metamorphism and deformation with distinct intensity are
associated with these phases. The records of these deformations
are clear in orbital remote sensing images and can be used as
diagnostic of the distinct motion/deformation events in the
Province. These orbital images are fundamental tools for
tectono-stratigraphic mapping purposes in the Province.",
copyholder = "SID/SCD",
issn = "0101-9082",
language = "pt",
targetfile = "evolu{\c{c}}{\~a}o tectono.pdf",
urlaccessdate = "2024, May 02"
}