@MastersThesis{Teruiya:2002:InDiDa,
author = "Teruiya, Rosely Kimie",
title = "Integra{\c{c}}{\~a}o digital de dados multifontes no estudo
geol{\'o}gico do granito cigano, prov{\'{\i}}ncia mineral de
Caraj{\'a}s - PA",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2002",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2002-10-14",
keywords = "pesquisa geol{\'o}gica, imageamento por radar,
geof{\'{\i}}sica, granito, integra{\c{c}}{\~a}o de dados,
Caraj{\'a}s (PA), geological surveys, imaging radar, geophysics,
granite, data integration.",
abstract = "Produtos digitais integrados de sensoriamento remoto e
geof{\'{\i}}sica foram avaliados no intuito de gerar um mapa
geol{\'o}gico do Granito Cigano e seu entorno, localizado na
Prov{\'{\i}}ncia Mineral de Caraj{\'a}s, estado do Par{\'a}.
Os granitos anorog{\^e}nicos, como o Cigano, constituem um dos
principais representantes da evolu{\c{c}}{\~a}o
proteroz{\'o}ica da regi{\~a}o de Caraj{\'a}s, como
consequ{\^e}ncia do regime distensivo que afetou toda a
Amaz{\^o}nia Oriental. Este granito apresenta forma
grosseiramente el{\'{\i}}ptica e homogeneidade composicional,
muito pouco explorado na literatura, sendo este o primeiro
trabalho a enfocar t{\'e}cnicas de sensoriamento remoto em seu
mapeamento. Foram analisados produtos integrados SAR Wide
(SAREX'92)/TM-Landsat, RADARSAT Standard/TM-Landsat e SAR Wide/
Gama (canais Contagem Total, Pot{\'a}ssio, T{\'o}rio e
Ur{\^a}nio). Para a gera{\c{c}}{\~a}o destes produtos foram
realizadas rigorosas corre{\c{c}}{\~o}es geom{\'e}tricas nas
imagens e utilizadas t{\'e}cnicas de realce de contraste e
transforma{\c{c}}{\~o}es IHS, j{\'a} difundidas com sucesso em
aplica{\c{c}}{\~o}es geol{\'o}gicas. Com a
fotointerpreta{\c{c}}{\~a}o dos produtos, juntamente com dados
de campo e trabalhos anteriores, foi poss{\'{\i}}vel discriminar
seis f{\'a}cies no granito, relacionadas a diferen{\c{c}}as
composicionais e evolu{\c{c}}{\~a}o magm{\'a}tica do corpo.
V{\'a}rios litotipos relacionados {\`a}s rochas encaixantes
tamb{\'e}m foram identificados, principalmente devido {\`a}
combina{\c{c}}{\~a}o de relevo e resposta
gamaespectrom{\'e}trica caracter{\'{\i}}stica de cada unidade.
Diferentes dire{\c{c}}{\~o}es de fraturamento foram mapeadas
dentro do granito e estruturas tect{\^o}nicas foram reconhecidas
no entorno, como representantes das fases de
movimenta{\c{c}}{\~a}o ocorrida no Cintur{\~a}o de Cisalhamento
Itacai{\'u}nas. Os resultados obtidos confirmam a efic{\'a}cia
na utiliza{\c{c}}{\~a}o das t{\'e}cnicas de
integra{\c{c}}{\~a}o de dados para mapeamento geol{\'o}gico ou
programas de explora{\c{c}}{\~a}o mineral em ambientes de
dif{\'{\i}}cil acesso e com densa cobertura vegetal. ABSTRACT:
Remote sensing and geophysics integrated digital products were
evaluated in order to generate a geologic map of Cigano Granite
and its country rocks, located in the Caraj{\'a}s Mineral
Province, Par{\'a} State, North of Brazil. The anorogenic
granites, like Cigano, are amongst the main representatives of the
Caraj{\'a}s region protherozoic evolution, being the result of a
distensive system that affected all Eastern Amazon. This granite,
of roughly elliptical shape and homogeneous composition, has so
far barely been explored in the expert literature, what renders
the current research a pioneer work in the mapping through remote
sensing-based techniques. For this end, integrated products have
been analyzed, such as SAR Wide (SAREX'92)/TM-Landsat, RADARSAT
Standard/TM-Landsat e SAR Wide/Gamma-ray (Total Counting,
Potassium, Thorium, and Uranium channels). For the generation of
such products, accurate geometric corrections have been carried
out in each of the sensors images, followed by contrast
enhancement operations and IHS transformations, successfully
applied in alike geological studies. By means of the
photointerpretation of these products along with field
observations and previous scientific works on this matter, six
facies were assessed in the Cigano Granite, related both to
differences in its composition and to its magmatic evolution.
Several other lithotypes associated with the country rocks were
identified, mainly because of the peculiar combination of the
gamaspectrometric behavior and relief of each unit. Different
fracture directions were mapped inside the Cigano Granite and
tectonic structures were recognized in its surroundings, as
consequences of the motion phases occurred in the Itacai{\'u}nas
Shear Belt. The results obtained confirm the efficiency of the
techniques based on Remote Sensing and Geophysics data integration
for geological mapping or mineral exploration programs undertaken
in places of difficult access and dense vegetation.",
committee = "Almeida Filho, Raimundo (presidente) and Paradella, Waldir Renato
(orientador) and Santos, Athos Ribeiro dos (orientador) and
Veneziani, Paulo and Agnol, Roberto Dall'",
copyholder = "SID/SCD",
englishtitle = "Digital integration of multisources data on geological studies at
cigano granite, Caraj{\'a}s Mineral Province - Par{\'a} State,
Brazil",
label = "10584",
language = "pt",
pages = "137",
ibi = "6qtX3pFwXQZsFDuKxG/xKK99",
url = "http://urlib.net/ibi/6qtX3pFwXQZsFDuKxG/xKK99",
targetfile = "publicacao.pdf",
urlaccessdate = "29 abr. 2024"
}