Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar
Fuente:
Redalyc
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Academia Brasileira de Ciências
2003
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1876481132955959296 |
|---|---|
| author | Dilce F. Rossetti |
| author_facet | Dilce F. Rossetti |
| contents | Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar Dilce F. Rossetti Multidisciplinaria (Ciencias Naturales y Exactas) Neogene tectonics sedimentary rocks northeastern Pará State Ground Penetrating Radar The geological characterization of shallow subsurface Neogene deposits in northeastern Pará State using Ground Penetrating Radar (GPR) revealed normal and reverse faults, as well as folds, not yet well documented by field studies. The faults are identified mostly by steeply-dipping reflections that sharply cut the nearby reflections causing bed offsets, drags and rollovers. The folds are recognized by reflections that are highly undulating, configuring broad concave and convex-up features that are up to 50 m wide and 80 to 90 ns deep. These deformation structures are mostly developed within deposits of Miocene age, though some of the faults might continue into younger deposits as well. Although the studied GPR sections show several diffractions caused by trees, differential degrees of moisture, and underground artifacts, the structures recorded here can not be explained by any of these 'noises'. The detailed analysis of the GPR sections reveals that they are attributed to bed distortion caused by brittle deformation and folding. The record of faults and folds are not widespread in the Neogene deposits of the Bragantina area. These GPR data are in agreement with structural models, which have proposed a complex evolution including strike-slip motion for this area from the Miocene to present. 2003 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32775209 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.2 Vol.75 |
| format | Artículo científico |
| id | redalyc_32775209 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar Dilce F. Rossetti Multidisciplinaria (Ciencias Naturales y Exactas) Neogene tectonics sedimentary rocks northeastern Pará State Ground Penetrating Radar Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar Dilce F. Rossetti Multidisciplinaria (Ciencias Naturales y Exactas) Neogene tectonics sedimentary rocks northeastern Pará State Ground Penetrating Radar The geological characterization of shallow subsurface Neogene deposits in northeastern Pará State using Ground Penetrating Radar (GPR) revealed normal and reverse faults, as well as folds, not yet well documented by field studies. The faults are identified mostly by steeply-dipping reflections that sharply cut the nearby reflections causing bed offsets, drags and rollovers. The folds are recognized by reflections that are highly undulating, configuring broad concave and convex-up features that are up to 50 m wide and 80 to 90 ns deep. These deformation structures are mostly developed within deposits of Miocene age, though some of the faults might continue into younger deposits as well. Although the studied GPR sections show several diffractions caused by trees, differential degrees of moisture, and underground artifacts, the structures recorded here can not be explained by any of these 'noises'. The detailed analysis of the GPR sections reveals that they are attributed to bed distortion caused by brittle deformation and folding. The record of faults and folds are not widespread in the Neogene deposits of the Bragantina area. These GPR data are in agreement with structural models, which have proposed a complex evolution including strike-slip motion for this area from the Miocene to present. 2003 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32775209 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.2 Vol.75 |
| title | Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Neogene tectonics sedimentary rocks northeastern Pará State Ground Penetrating Radar |
| url | https://www.redalyc.org/articulo.oa?id=32775209 |