Expressão em superfície do sistema de falhas Poço Verde-caraúbas, Bacia Potiguar
The structural knowledge of the western portion of the Potiguar Basin is still in its infancy, especially these related to NW-trending fault systems. This paper analyzes the Poço Verde-Caraúbas Fault System, which was initially recognized in subsurface. The activities involved in this study correspo...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/18812 |
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| Resumo: | The structural knowledge of the western portion of the Potiguar Basin is still in its
infancy, especially these related to NW-trending fault systems. This paper analyzes the
Poço Verde-Caraúbas Fault System, which was initially recognized in subsurface. The
activities involved in this study correspond to remote-sensing analysis and, in particular,
to the geometric and kinematic analysis of post-rift sequences of the basin. In addition,
the study aimed to determine the stress fields operating in the area. The studies were
carried out in an area of 1,000 km², located in the western portion of Potiguar Basin
along the Poço Verde-Caraúbas Fault System, Rio Grande do Norte State. The remote
sensing imagery indicates a predominance of NW-SE-trending lineaments, consistent
with the fault system under study, followed by the NE-SW, N-S and E-W directions.
The tectonic structures mapped were analyzed only in outcrops of the Jandaíra
Formantion. They are joints (filled or not) in all directions, but with predominance of
the NW-trending joints. Faults are usually N-S-trending normal faults and NW-SE and
NE-SW-trending strike-slip faults. Geodynamic analysis identified two tectonic stress
fields: the first field, "Field 1" is represented by an N-S-trending horizontal compression
and E-W-trending horizontal extension. This field affected the Potiguar Basin at least
until the Miocene. The second field, "Field 2", is represented by an E-W-trending
horizontal compression and N-S-trending horizontal extension. This is the present-day
stress field and has affected the Potiguar basin since the Pliocene |
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