Publication Date:
2022-05-25
Description:
Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Geology 315-318 (2012): 58-63, doi:10.1016/j.margeo.2012.06.001.
Description:
Morphology of four spreading segments on the southern Chile Rise is described based on
multi-beam bathymetric data collected along the axial zones. The distribution of axial volcanoes,
the character of rift valley scarps, and the average depths vary between Segment 1 in the south,
terminating at the Chile Triple Junction, and Segment 4 in the north, which are separated by
three intervening transform faults. Despite this general variability, there is a consistent pattern of
clockwise rotation of the southern-most axial volcanic ridge within each of Segments 2, 3, and 4,
relative to the overall trend of the rift valley. A combination of local ridge-transform intersection
stresses and regional tectonics may influence spreading axis evolution in this sense.
Description:
This work was
supported by NOAA/OE grant NA08OAR4600757 and University of California Ship Funds.
Keywords:
Chile Rise
;
Mid-ocean ridge
;
Oceanic spreading center
;
Axial morphology
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
application/pdf
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