FN Archimer Export Format
PT J
TI Contractional salt deformation in a recently inverted basin: Miocene to current salt deformation within the central Algerian basin
BT 
AF Blondel, Simon
   BELLUCCI, Massimo
   Evans, Sian
   Del Ben, Anna
   Camerlenghi, Angelo
AS 1:1,2;2:3,4;3:5;4:2;5:1;
FF 1:;2:;3:;4:;5:;
C1 National Institute of Oceanography and Applied Geophysics OGS Trieste, Italy
   Department of Mathematics and Geosciences University of Trieste, Italy
   Ifremer, Department of Marine Geosciences BP 70, 29280 Plouzané, France
   SAIPEM SA, Montigny-le-Bretonneux, France
   University of Oslo Department of Geosciences Oslo ,Norway
C2 OGS, ITALY
   UNIV TRIESTE, ITALY
   IFREMER, FRANCE
   SAIPEM, FRANCE
   UNIV OSLO, NORWAY
SI BREST
SE PDG-REM-GEOOCEAN-GIPS
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-france
   copubli-europe
IF 3.2
TC 5
UR https://archimer.ifremer.fr/doc/00767/87925/93526.pdf
LA English
DT Article
DE ;active margins;Algerian basin;Algero-Balearic basin;contractional salt system;Messinian Salinity Crisis;salt tectonics
AB Field analogues illustrating the early stage of deformation of shortening structures in salt-bearing orogenic fold-and-thrust belts are not yet well illustrated in literature. The relatively young Messinian salt of the Algerian basin could represent a good case example of such systems. The Algerian Basin is a deep-water Miocene back-arc basin including a layer of mobile Messinian evaporites up to 2 km thick. The Messinian salt was deposited in an already inverted basin, after its extensive stage. Its inversion initiated in the Tortonian, with a N-NW shortening induced by the north-westward motion of the African plate. In this study, we use new 2D multichannel seismic data to identify, classify and map salt structures throughout the central Algerian Basin and re-assess its structural style. We interpret contractional salt tectonic structures, such as buckle folds, squeezed diapirs and related salt sheets as evidence of regional thick-skinned shortening episodes. We conclude that horizontal displacement loading has driven salt deformation within the basin since its deposition. We also show spatial variations in the structural style of the central Algerian Basin, both along- and down-dip. We demonstrate that the initial shortening-related salt deformation in the late Messinian was focussed along the Algerian margin and later shifted outward toward the Balearic margin in the Plio-Quaternary. The shifting of the deformation front is interpreted to be a result of the thickening and strengthening of the overburden. The second peak of deformation may have reactivated faults along the Emile-Baudot escarpment with thick-skinned deformation. We also observe a variation in the intensity of the salt deformation along the margin from SW to NE, which may be due to variable tectonic loading applied along the Algerian margin or the pre-shortening distribution of salt. 
PY 2022
PD OCT
SO Basin Research
SN 0950-091X
PU Wiley
VL 34
IS 5
UT 000794047900001
BP 1632
EP 1654
DI 10.1111/bre.12673
ID 87925
ER

EF