FN Archimer Export Format
PT J
TI The "lost Inca Plateau": cause of flat subduction beneath Peru?
BT 
AF GUTSCHER, Marc-Andre
   OLIVET, Jean-Louis
   ASLANIAN, Daniel
   EISSEN, JP
   MAURY, Rene
AS 1:1;2:2;3:2;4:3;5:4;
FF 1:;2:PDG-DOP-DCB-GM-LGG;3:;4:;5:;
C1 Univ Montpellier 2, Lab Geophys & Tecton, F-34095 Montpellier 5, France.
   IFREMER, Brest, France.
   IRD, Brest, France.
   Univ Bretagne Occidentale, Brest, France.
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   IRD, FRANCE
   UBO, FRANCE
SI BREST
SE UBO
   PDG-DOP-DCB-GM-LGG
IF 2.882
TC 148
UR https://archimer.ifremer.fr/doc/1999/publication-360.pdf
LA English
DT Article
DE ;Nazca Plate;subduction;Nazca Ridge;Peru;reconstruction
AB Since flat subduction of the Nazca Plate beneath Peru was first recognized in the 1970s and 1980s a satisfactory explanation has eluded researchers. We present evidence that a lost oceanic plateau (Inca Plateau) has subducted beneath northern Peru and propose that the combined buoyancy of Inca Plateau and Nazca Ridge in southern Peru supports a 1500 km long segment of the downgoing slab and shuts off arc volcanism. This conclusion is based on an analysis of the seismicity of the subducting Nazca Plate, the structure and geochemistry of the Marquesas Plateau as well as tectonic reconstructions of the Pacific¿Farallon spreading center 34 to 43 Ma. These restore three sub¿parallel Pacific oceanic plateaus; the Austral, Tuamotu and Marquesas, to two Farallon Plate counterparts; the Iquique and Nazca Ridges. Inca Plateau is apparently the sixth and missing piece in an ensemble of 'V-shaped' hotspot tracks formed at on-axis positions. We argue the mirror image of the Inca Plateau, the Marquesas Plateau, is an ancient edifice overprinted by recent volcanism, in disagreement with the widely accepted young (<5 Ma) hotspot model for plateau formation. 
PY 1999
PD SEP
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 171
IS 3
UT 000082374200004
BP 335
EP 341
DI 10.1016/S0012-821X(99)00153-3
ID 360
ER

EF