| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Mass-transport deposits on the Algerian margin (Algiers area): morphology, lithology and sedimentary processes
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| Autores: |
Dan, Gabriela
Sultan, Nabil
Cattaneo, Antonio
Deverchere, J
Yelles, K
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| Data: |
2009-11-11
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| Ano: |
2009
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| Palavras-chave: |
Triggering mechanism
Morphology
Mass transport deposit
Algeria
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| Resumo: |
On 21st May 2003, a damaging earthquake of Mw: 6.9 struck the region of Boumerdès 40 km east of Algiers in northern Algeria. The seismic shocks had devastating effects in the offshore area between the cities of Algiers and Dellys, where numerous cable breaks were observed. The submarine area encompassing the 2003 Boumerdès epicenter (central Algerian margin) was recently investigated using geophysical and sampling tools. It has been observed that small-size slides and mass-transport deposits occur across this area. Thus, a detailed analysis was performed on 25 submarine slides identified in water depth from 500 m to 2700 m, by measuring different morphological parameters (i.e. surface, head-scarp height, slope in the source area and in adjacent areas).Various deposits consisting of matrix supported mud-clast, distorted stratified sediments and sandturbidite beds were observed in gravity cores near and within the most significant-size slide. Based on this work and previous studies it can be presumed that the recurrent seismic activity can be considered as the main triggering factor for failure in the central Algerian margin.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2009/acte-6453.pdf
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| Editor: |
" 4th International Symposium " Austin, Texas, November 8-11, 2009
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| Relação: |
http://archimer.ifremer.fr/doc/00000/6453/
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| Formato: |
application/pdf
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| Direitos: |
2009 Bureau of Economic Geology, Jackson School of Geosciences in Austin
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