FN Archimer Export Format
PT J
TI Deepwater fold-and-thrust belt along New Caledonia's western margin: relation to post-obduction vertical motions
BT 
AF COLLOT, Julien
   PATRIAT, Martin
   ETIENNE, S.
   ROUILLARD, P.
   SOETAERT, F.
   JUAN, C.
   MARCAILLOU, B.
   PALAZZIN, G.
   CLERC, C.
   MAURIZOT, P.
   PATTIER, F
   TOURNADOUR, E.
   SEVIN, B.
   PRIVAT, A.
AS 1:1;2:1,2;3:1,3;4:1,3,4;5:1,2;6:1;7:5;8:6;9:7;10:1;11:1,3;12:1,3;13:1;14:1;
FF 1:;2:PDG-REM-GM-LAD;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;
C1 DIMENC, Serv Geol Nouvelle Caledonie, Noumea, New Caledonia.
   IFREMER, Noumea, New Caledonia.
   ZoNeCo Res Program, ADECAL Technopole, Noumea, New Caledonia.
   Novas Oil & Gas Consulting Ltd, Slough, Berks, England.
   CNRS, Geoazur, IRD, UNSA,OCA,UMR 7329, Noumea, New Caledonia.
   Univ Orleans, ISTO, Orleans, France.
   Univ Nouvelle Caledonie, LIVE, Noumea, New Caledonia.
C2 SERV GEOL NOUVELLE CALEDONIE, FRANCE
   IFREMER, FRANCE
   ADECAL TECHNOPOLE, FRANCE
   NOVAS OIL & GAS CONSULTING LTD, UK
   CNRS, FRANCE
   UNIV ORLEANS, FRANCE
   UNIV NOUVELLE CALEDONIE, FRANCE
SI BREST
SE PDG-REM-GM-LAD
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.583
TC 10
UR https://archimer.ifremer.fr/doc/00405/51614/52162.pdf
   https://archimer.ifremer.fr/doc/00405/51614/52163.pdf
LA English
DT Article
CR IPOD
BO Alis
DE ;deepwater fold-and-thrust belt;obduction;isostasy
AB Classically, deepwater fold-and-thrust belts are classified in two main types, depending if they result from near- or far-field stresses and the understanding of their driving and triggering mechanism is poorly known. We present a geophysical dataset off the western margin of New Caledonia (SW Pacific) that reveals deformed structures of a deepwater fold-and-thrust belt that we interpret as a near-field gravity-driven system, which is not located at a rifted passive margin. The main factor triggering deformation is inferred to be oversteepening of the margin slope by post-obduction isostatic rebound. Onshore erosion of abnormally-dense obducted material, combined with sediment loading in the adjacent basin, has induced vertical motions that have caused oversteepening of the margin. Detailed morpho-bathymetric, seismic stratigraphic and structural analysis reveals that the fold-and-thrust belt extends 200 km along the margin, and 50 km into the New Caledonia Trough. Deformation is rooted at depths greater than 5 km beneath the seafloor, affects an area of 3500 km2, and involves a sediment volume of approximately 13 000 km3. This deformed belt is organized into an imbricate fan system of faults, and one out-of-sequence thrust fault affects the seabed. The thrust faults are deeply rooted in the basin along a low-angle floor thrust and connected to New Caledonia Island along a major detachment. This study not only provides a better knowledge of the New Caledonia margin, but also provides new insight into the mechanisms that trigger deepwater fold-and-thrust belts. 
PY 2017
PD OCT
SO Tectonics
SN 0278-7407
PU Amer Geophysical Union
VL 36
IS 10
UT 000416038200011
BP 2108
EP 2122
DI 10.1002/2017TC004542
ID 51614
ER

EF