FN Archimer Export Format
PT J
TI Identification of Shear Zones and Their Causal Mechanisms Using a Combination of Cone Penetration Tests and Seismic Data in the Eastern Niger Delta
BT 
AF GARZIGLIA, Sebastien
   SULTAN, Nabil
   CATTANEO, Antonio
   KER, Stephan
   MARSSET, Bruno
   RIBOULOT, Vincent
   VOISSET, Michel
   ADAMY, J.
   UNTERSEH, S.
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:1;8:2;9:2;
FF 1:PDG-REM-GM-LES;2:PDG-REM-GM-LES;3:PDG-REM-GM-LES;4:PDG-REM-GM-LGG;5:PDG-REM-GM-LGG;6:PDG-REM-GM-LES;7:PDG-REM-GM-CTDI;8:;9:;
C1 IFREMER, F-29280 Plouzane, France.
   Total, France
C2 IFREMER, FRANCE
   TOTAL, FRANCE
SI BREST
SE PDG-REM-GM-LES
   PDG-REM-GM-LGG
   PDG-REM-GM-CTDI
IN WOS Ifremer jusqu'en 2018
   copubli-france
TC 11
UR https://archimer.ifremer.fr/doc/00105/21662/19695.pdf
LA English
DT Article
CR ERIG 3D
BO Pourquoi pas ?
DE ;Cone penetration tests;shear zone;3D seismic data;ultrahigh-resolution 2D seismic;mass-transport complex;slope stability
AB In a site investigation of the eastern part of the offshore Niger delta, cone penetration tests (CPTU) showed significant drops in tip resistance, associated with decreases in sleeve friction and induced excess pore pressures at the interface between superficial sediments and the underlying deposits of a mass-transport complex (MTC) called NG1. Such signature characteristics of weakened zones are clearly expressed at three sites where the drop in tip resistance reaches more than 40% over 2-3 m-thick intervals. Correlations between CPTU profiles and both 3D and ultrahigh-resolution 2D seismic data suggest that the weakened zones surround syndepositional the within the frontal part of NG1. Hence, weakening appears associated with the remobilization of thrust faults, inducing localized plastic shear. Relatively recent, deep-seated structural movements affecting NG1 are suspected to have remobilized these thrusts faults. When considering the sole influence of gravity, the fact that shear strength is mobilized within scattered, limited zones along steeply dipping syndepositional faults is not favorable for the further development of a continuous slope-parallel failure surface above NC1.
PY 2010
SO Advances in Natural and Technological Hazards Research
SN 1878-9897
PU Springer
VL 28
UT 000277840800005
BP 55
EP 65
DI 10.1007/978-90-481-3071-9_5
ID 21662
ER

EF