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MORPHOTECTONIC AND MOSPHOSTRUCTURES OF
THE SANTA CATARINA FLUORITE DISTRICT, BRAZIL
Juan Antonio Altamirando Flores
Nelson Amoretti Lisboa
Universidade Federal do Rio Grande do Sul - UFRGS
Instituto de Geociéncias - DEMIPE
Av. Bento Gonçalves, 9500
91540-000 - Porto Alegre - RS, Brazil
ISPRS Commission VII / Working Group 4
ABSTRACT
The morphotectonic and morphostructural characterization of the Fluorite District located in the
Southeast of Santa Catarina State, Brazil, has been undertaken through the analysis and interpretation of
remote sensing digital and analogic products from the TM sensor of Landsat 5 satellite. Three
morphotectonic domains are observed, respectively designated Higher Massifs, Circum-denudation Areas
and Plains. The Domain of Higher Massifs is integrated by the process with coarse rugose texture; the
domain is constituted by the crystalline rocks of the Tabuleiro Complex and Subida Intrusive Suite. The
Domain of the Circum-denudation Areas comprises the morphotectonic units of Intermediate Dissecation
of Massifs and Periphericl Depression, showing and erosion process with fine rugose texture; it
comprises the granitic rocks of the Subida Intrusive Suite an Gondwana sedimentary cover. The Domain
of Plains is represented by the unit Coastal and Alluvial Plain with a depositional process reflecting as
smooth texture in the image; it is formed by Tertiary and Quaternary sediments. The morphostructures
cutting the Fluorite District are Grouped in four series, designated Urussanga-type Lineament (N40°E)
and Tubardo-Rio D'Una-type Lineament (N30° E) The first two correspond to Precambrian structural
traces; the other two are related to the rifting and opening of the South Atlantic Ocean. The unit of
Intermediate Dissecation of Massifs contains the major deposits and occurrences of fluorite in the District
whenever associated to the Lineaments of Morro da Fumaga-Pedras Grandes-type and Tubardo-Rio
D'Una-type.
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