FN Archimer Export Format
PT J
TI Propagation of back-arc extension into the arc lithosphere in the southern New Hebrides volcanic arc
BT 
AF PATRIAT, Martin
   COLLOT, Julien
   DANYUSHEVSKY, L.
   FABRE, M.
   MEFFRE, S.
   FALLOON, T.
   ROUILLARD, P.
   PELLETIER, B.
   ROACH, M.
   FOURNIER, M.
AS 1:1,2;2:2;3:3;4:1,2;5:3;6:4;7:5;8:6;9:3;10:7;
FF 1:PDG-REM-GM-LGG;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 IFREMER, Noumea, New Caledonia.
   Serv Geol Nouvelle Caledonie, Noumea, New Caledonia.
   Univ Tasmania, ARC Ctr Excellence Ore Deposits, Hobart, Tas, Australia.
   Univ Tasmania, Sch Phys Sci, Hobart, Tas, Australia.
   ADECAL Technopole, ZoNeCo Res Program, Noumea, New Caledonia.
   IRD, Noumea, New Caledonia.
   Univ Paris 06, Inst Sci Terre Paris, CNRS, UMR 7193, Paris, France.
C2 IFREMER, FRANCE
   SERV GEOL NOUVELLE CALEDONIE, FRANCE
   UNIV TASMANIA, AUSTRALIA
   UNIV TASMANIA, AUSTRALIA
   ADECAL TECHNOPOLE, FRANCE
   IRD, FRANCE
   UNIV PARIS 06, FRANCE
SI NOUMEA
SE PDG-REM-GM-LGG
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-univ-france
   copubli-int-hors-europe
IF 2.993
TC 30
UR https://archimer.ifremer.fr/doc/00280/39110/37663.pdf
LA English
DT Article
AB New geophysical data acquired during three expeditions of the R/V Southern Surveyor in the southern part of the North Fiji Basin allow us to characterize the deformation of the upper plate at the southern termination of the New Hebrides subduction zone, where it bends eastward along the Hunter Ridge. Unlike the northern end of the Tonga subduction zone, on the other side of the North Fiji Basin, the 90° bend does not correspond to the transition from a subduction zone to a transform fault, but it is due to the progressive retreat of the New Hebrides trench. The subduction trench retreat is accommodated in the upper plate by the migration toward the southwest of the New Hebrides arc and toward the south of the Hunter Ridge, so that the direction of convergence remains everywhere orthogonal to the trench. In the back-arc domain, the active deformation is characterized by propagation of the back-arc spreading ridge into the Hunter volcanic arc. The N-S spreading axis propagates southward and penetrates in the arc, where it connects to a sinistral strike-slip zone via an oblique rift. The collision of the Loyalty Ridge with the New Hebrides arc, less than two million years ago, likely initiated this deformation pattern and the fragmentation of the upper plate. In this particular geodynamic setting, with an oceanic lithosphere subducting beneath a highly sheared volcanic arc, a wide range of primitive subduction-related magmas has been produced including adakites, island arc tholeiites, back-arc basin basalts, and medium-K subduction-related lavas.
PY 2015
PD SEP
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 16
IS 9
UT 000365039400024
BP 3142
EP 3159
DI 10.1002/2015GC005717
ID 39110
ER

EF