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THE STRUCTURAL AND TECTONIC SIGNIFICANCE OF THE LINEAMENTS 
SURROUNDING TUCANO BASIN, NORTHEAST BAHIA, BRAZIL 
C.C Liu 
R. Almeida Filho 
F. P. Miranda 
C. M. Bentz 
Instituto Nacional de Pesquisas Espaciais - INPE 
Divisäo de Sensoriamento Remoto e Meteorologia Espacial - DSM 
Caixa Postal 515 
12201-970 - Säo José dos Campos - SP 
ISPRS Commission VII / Working Group 4 
ABSTRACT 
The work presents the interpretative results in structural geology from SLAR imagery. The study area 
includes the north part of the Tucano basin and Precambrian complex in its west and east borders. 
Topographic and tonal features of the SLAR imagery permitted to extract and classify a great number of 
diverse structural lineaments. By analytical classification, the structural and tectonic significance of the 
lineaments and their geochronologic sequence can be inferred. Thus, circular and are segment features of 
various sizes in the basement are interpreted as the oldest structures, generated in a deepest level. Lineaments 
associated to greenstone belt in the southeast part of the study area may represent folded foliation and 
bedding, fractures and faults. The Pernambuco transcurrent fault zone is revealed in the SLAR imagery as a 
belt of lineaments running across the north part of the study area. In the study area, two system of lineaments 
in N7OW and N7OE directions may be a pair of unbalanced conjugation of shearing, caused by the warping 
of the Pernambuco wrench faulting. Another two system lineaments in NSOW and N5OE, well concentrated 
in narrow belts with anostomosing pattern, are inferred as a pair of conjugate shear cause by an extensive 
stress, an thus a series of pull-appart sedimentary basins were formed. These two system of lineaments may 
be of particular interest in petroleum exploration. The other two systems of lineaments in N2OW and N2OE 
are considered as the youngest structural features, and interpreted as a pair of conjugate joints or minor faults 
in superficial level caused by a more recent rejuvenation event. 
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