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Authors :
Roger Hekinian
S. Diniega
Jean Francheteau
R. Armijo
J.P. Cogné
Roger Searle
Jacques Girardeau
Fernando Martinez
M. Constantin
David F. Naar
Richard Hey
Source :
Marine Geophysical Researches. 23:1-12
Publication Year :
2002
Publisher :
Springer Science and Business Media LLC, 2002.

Abstract

Several mechanisms have been proposed to account for the rotation of the nearly north-south abyssal hill fabric formed on the East Pacific Rise north of the Easter Microplate to the nearly east-west trends in the northern microplate interior. Proposed mechanisms include rigid microplate rotation, transform fault – parallel shear, and bookshelf faulting during the transfer of lithosphere from the Nazca Plate to the microplate. We used a submersible magnetometer on a NAUTILE dive program to measure the magnetic vector rotation of a pillow basalt and dike spur near Pito Deep, the present location of the tip of the propagating rift system that created the microplate. Our results, although too limited to draw strong conclusions from, suggest clockwise rotations of the seafloor magnetic vectors inconsistent with the transform-parallel shear model, and larger than can be explained solely by rigid microplate rotation.

Details

ISSN :
00253235
Volume :
23
Database :
OpenAIRE
Journal :
Marine Geophysical Researches
Accession number :
edsair.doi...........ee722b1d73d2b87fb68ec653beb8753f
Full Text :
https://doi.org/10.1023/a:1021257915420