FN Archimer Export Format
PT J
TI New Caledonia obducted Peridotite Nappe: offshore extent and implications for obduction and post-obduction processes
BT 
AF PATRIAT, Martin
   COLLOT, Julien
   ETIENNE, Samuel
   POLI, Sara
   CLERC, Camille
   MORTIMER, Nick
   PATTIER, France
   JUAN, Caroline
   ROEST, Walter
AS 1:1,2;2:2;3:3;4:1,2;5:4;6:5;7:1,2;8:3;9:1;
FF 1:PDG-REM-GM-LAD;2:;3:;4:PDG-REM-GM;5:;6:;7:PDG-REM-GM-LAD;8:;9:PDG-REM-GM-LAD;
C1 IFREMER, Unite Geosci Marines, Plouzane, France.
   DIMENC, Serv Geol Nouvelle Caledonie, Noumea, New Caledonia.
   ZoNeCo Res Program, ADECAL Technopole, Noumea, New Caledonia.
   Univ Nouvelle Caledonie, ISEA, Noumea, New Caledonia.
   GNS Sci, Dunedin, New Zealand.
C2 IFREMER, FRANCE
   DIMENC SERV GEOL NOUVELLE CALEDONIE, FRANCE
   ADECAL TECHNOPOLE, FRANCE
   UNIV NOUVELLE CALEDONIE, FRANCE
   GNS SCI, NEW ZEALAND
SI BREST
   NOUMEA
SE PDG-REM-GM-LAD
   PDG-REM-GM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 3.975
TC 21
UR https://archimer.ifremer.fr/doc/00431/54242/55568.pdf
LA English
DT Article
CR KANACONO
   VESPA
BO Alis
   L'Atalante
AB One of the largest ophiolitic peridotite masses in the world covers a quarter of the island of Grande Terre, New Caledonia. The Peridotite Nappe was obducted during the Eocene, is weakly deformed and corresponds to the highest of a structurally simple pile of thrust nappes. We present new marine seismic data that allows us to track the offshore continuation of the Peridotite Nappe along‐strike for a distance of more than 500 km south of New Caledonia, and to image its pre‐, syn‐ and post‐obduction sedimentary records. Offshore, the Peridotite Nappe underlies a c. 150‐km wide and 2 km‐deep basin. Flat‐topped horsts of peridotite are clearly bounded by major normal faults; in contrast faults are obscure onland. To the east, the Peridotite Nappe roots along the eastern margin of the Félicité Ridge (new name), a c. 300 x 25 km dome‐shaped ridge, which we interpret as being the southern extension of the HP/LT metamorphic core complex observed in New Caledonia. Two alternative tectonic models address the relative timing and relationships between Peridotite Nappe emplacement, uplift of a metamorphic core complex, and extensional tectonics. These models provide new ideas for the understanding the formation of the eastern margin of the Zealandia continent. Our results contribute to an understanding of how oceanic mantle is emplaced onto continental margins. 
PY 2018
PD APR
SO Tectonics
SN 0278-7407
PU Amer Geophysical Union
VL 37
IS 4
UT 000436164900003
BP 1077
EP 1096
DI 10.1002/2017TC004722
ID 54242
ER

EF