Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone
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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2014
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| author | ANA CATARINA A. MOURA |
| author_facet | ANA CATARINA A. MOURA |
| contents | Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone ANA CATARINA A. MOURA PAULO H. S. DE OLIVEIRA JOAQUIM M. FERREIRA FRANCISCO H. R. BEZERRA REINHARDT A. FUCK ADERSON F. DO NASCIMENTO Multidisciplinaria (Ciencias Naturales y Exactas) Meruoca pluton Riacho Fundo fault seismological data Transbrasiliano Lineament A sequence of earthquakes occurred in 2008 in the Meruoca granitic pluton, located in the northwestern part of the Borborema Province, NE Brazil. A seismological study defined the seismic activity occurring along the seismically-defined Riacho Fundo fault, a 081° striking, 8 km deep structure. The objective of this study was to analyze the correlation between this seismic activity and geological structures in the Meruoca granite. We carried out geological mapping in the epicentral area, analyzed the mineralogy of fault rocks, and compared the seismically-defined Riacho Fundo fault with geological data. We concluded that the seismically-defined fault coincides with ~E–W-striking faults observed at outcrop scale and a swarm of Mesozoic basalt dikes. We propose that seismicity reactivated brittle structures in the Meruoca granite. Our study highlights the importance of geological mapping and mineralogical analysis in order to establish the relationships between geological structures and seismicity at a given area. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907007 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| format | Artículo científico |
| id | redalyc_32732907007 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone ANA CATARINA A. MOURA Multidisciplinaria (Ciencias Naturales y Exactas) Meruoca pluton Riacho Fundo fault seismological data Transbrasiliano Lineament Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone ANA CATARINA A. MOURA PAULO H. S. DE OLIVEIRA JOAQUIM M. FERREIRA FRANCISCO H. R. BEZERRA REINHARDT A. FUCK ADERSON F. DO NASCIMENTO Multidisciplinaria (Ciencias Naturales y Exactas) Meruoca pluton Riacho Fundo fault seismological data Transbrasiliano Lineament A sequence of earthquakes occurred in 2008 in the Meruoca granitic pluton, located in the northwestern part of the Borborema Province, NE Brazil. A seismological study defined the seismic activity occurring along the seismically-defined Riacho Fundo fault, a 081° striking, 8 km deep structure. The objective of this study was to analyze the correlation between this seismic activity and geological structures in the Meruoca granite. We carried out geological mapping in the epicentral area, analyzed the mineralogy of fault rocks, and compared the seismically-defined Riacho Fundo fault with geological data. We concluded that the seismically-defined fault coincides with ~E–W-striking faults observed at outcrop scale and a swarm of Mesozoic basalt dikes. We propose that seismicity reactivated brittle structures in the Meruoca granite. Our study highlights the importance of geological mapping and mineralogical analysis in order to establish the relationships between geological structures and seismicity at a given area. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907007 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| title | Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Meruoca pluton Riacho Fundo fault seismological data Transbrasiliano Lineament |
| url | https://www.redalyc.org/articulo.oa?id=32732907007 |