FN Archimer Export Format
PT J
TI Quantifying the role of sandy-silty sediments in generating slope failures during earthquakes: example from the Algerian margin
BT 
AF DAN, Gabriela
   SULTAN, Nabil
   SAVOYE, Bruno
   DEVERCHERE, Jacques
   YELLES, Karim
AS 1:1,2;2:1;3:1;4:2,3;5:4;
FF 1:PDG-DOP-DCB-GM-LES;2:PDG-DOP-DCB-GM-LES;3:PDG-DOP-DCB-GM-LES;4:;5:;
C1 IFREMER, Lab Environm Sedimentaires, Plouzane, France.
   Univ Brest, CNRS, Inst Univ Europeeen Mer, UMR Domaines Ocean 6538, F-29280 Plouzane, France.
   Univ Europeenne Bretagne, Brest, France.
   CRAAG, Algiers, Algeria.
C2 IFREMER, FRANCE
   UBO, FRANCE
   UEB, FRANCE
   CRAAG, ALGERIA
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 2.445
TC 23
UR https://archimer.ifremer.fr/doc/2009/publication-6448.pdf
LA English
DT Article
CR MARADJA
   MARADJA/2
   PROGRAMME PRISMA
   SAMRA
BO Le Suroît
   Marion Dufresne
DE ;Earthquakes;Potential of liquefaction;Slope stability;Algerian margin
AB The Algerian margin is a seismically active region, where during the last century, several large magnitude earthquakes took place. This study combines geotechnical and sedimentological data with numerical modelling to quantitatively assess the present-day slope stability of the Algerian margin. Geotechnical laboratory tests, such as cyclic triaxial tests, oedometric tests and vane shear tests were carried out on sediment cores collected on the study area. The liquefaction potential of a sediment column located about 30 km from the BoumerdSs earthquake epicentre of 21st May 2003 was evaluated theoretically for an earthquake of M (w) = 6.8. We show that thin sand and silt beds such as those described on recovered sediment cores are the main cause of sediment deformation and liquefaction during earthquakes. Numerical calculations showed that the slope failure may occur during an earthquake characterised by a PGA in excess of 0.1g, and also that, under a PGA of 0.2g liquefaction could be triggered in shallow silty-sandy deposits. Moreover, comparison of the predicted slope failure with failure geometries inferred from seafloor morphology showed that earthquakes and subsequent mass movements could explain the present-day morphology of the study area.
PY 2009
PD JUL
SO International Journal of Earth Sciences
SN 1437-3254
PU Springer
VL 98
IS 4
UT 000266496600005
BP 769
EP 789
DI 10.1007/s00531-008-0373-5
ID 6448
ER

EF