FN Archimer Export Format
PT J
TI Tectonic-sedimentary architecture of surficial deposits along the continental slope offshore Romania (North of the Viteaz Canyon, Western Black Sea): Impact on sediment instabilities
BT 
AF Marsset, Tania
   Ballas, Gregory
   Munteanu, I.
   Aiken, Chastity
   Ion, G.
   Pitel-Roudaut, Mathilde
   Dupont, Pauline
AS 1:1;2:2;3:3;4:1;5:4;6:1;7:1;
FF 1:PDG-REM-GM-LGS;2:;3:;4:PDG-REM-GM-LAD;5:;6:PDG-REM-GM-CTDI;7:PDG-REM-GM-LAD;
C1 Ifremer (Institut Français de Recherche pour l'Exploitation de la Mer), REM-GM, BP 70 29290 Plouzané, France
   Géosciences Montpellier, Université de Montpellier, CNRS, France
   Faculty of Geology and Geophysics, University of Bucharest, 6 Traian Vuia St., Bucharest, Romania
   National Research and Development Institute for Marine Marine Geology and Geo-ecology - GeoEcoMar, 23-25, Dimitrie Onciul, Bucharest, Romania
C2 IFREMER, FRANCE
   UNIV MONTPELLIER, FRANCE
   UNIV BUCHAREST, ROMANIA
   GEOECOMAR, ROMANIA
SI BREST
SE PDG-REM-GM-LGS
   PDG-REM-GM-LAD
   PDG-REM-GM-CTDI
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.9
TC 0
UR https://archimer.ifremer.fr/doc/00736/84786/89814.pdf
LA English
DT Article
CR GHASS
BO Pourquoi pas ?
DE ;Romanian continental slope;Gas;gas hydrates;Turbidite systems;Sedimentary instabilities;Gravitational faults
AB The upper continental slope offshore Romania is a complex area hosting turbidite deposits, multiple types and ages of deep-seated faults, gas hydrates, gas-escape features, and numerous Mass Transport Deposits (MTDs). Multi-scale seismic data sets (2D-high-resolution and near-bottom very high-resolution) were used to study the interaction between such disparate geological features and determine their impact on slope stability. At least five main paleo-valleys have been identified in the north of the Viteaz (Danube) canyon/valley. The most recent channelized systems linked to these valleys formed over a basal layer of MTDs. These MTDs are associated with an unconformity corresponding to the Base Neoeuxinian Sequence Boundary formed during the last major sea-level fall. This erosional surface shows scarp alignments that coincide with underlying faults. We argue that gravity-driven fault reactivation, with possible upward gas/fluid migration along these faults, is a determinant factor controlling sedimentary instabilities. Numerous MTDs are also observed during channel-levees building and reveal local sediment instabilities related to localized erosional process in the canyon. Finally, MTDs recorded within the upper draping unit, suggest that sediment instability also occurred during recent sea level highstand. Sediment pulse, seismicity, and gas hydrate dynamics can also play a determinant role in sediment instability throughout the sediment record. 
PY 2022
PD JAN
SO Global And Planetary Change
SN 0921-8181
PU Elsevier BV
VL 208
UT 000740506800003
DI 10.1016/j.gloplacha.2021.103708
ID 84786
ER

EF