Correlated geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the Galápagos Spreading Center

Detrick, R. S.; Sinton, J. M.; Ito, G.; Canales, J. P.; Behn, M.; Blacic, T.; Cushman, B.; Dixon, J. E.; Graham, David W.; Mahoney, J. J.

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/0c483k97d

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Creator	Detrick, R. S. Sinton, J. M. Ito, G. Canales, J. P. Behn, M. Blacic, T. Cushman, B. Dixon, J. E. Graham, David W. Mahoney, J. J.
Abstract	As the Galápagos hot spot is approached from the west along the Galápagos Spreading Center there are systematic increases in crustal thickness and in the K/Ti, Nb/Zr, ³He/⁴He, H₂O, and Na₂O content of lavas recovered from the spreading axis. These increases correlate with progressive transitions from rift valley to axial high morphology along with decreases in average swell depth, residual mantle Bouguer gravity anomaly, magma chamber depth, average lava Mg #, Ca/Al ratio, and the frequency of point-fed versus fissure-fed volcanism. Magma chamber depth and axial morphology display a “threshold” effect in which small changes in magma supply result in large changes in these variables. These correlated variations in geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the western Galápagos Spreading Center reflect the combined effects of changes in mantle temperature and source composition on melt generation processes, and the consequences of these variations on magma supply, axial thermal structure, basalt chemistry, and styles of volcanism. Keywords: hotspots, mid-ocean ridges, Mantle plumes
Resource Type	Article
DOI	https://doi.org/10.1029/2002GC000350
Date Available	2010-05-13T13:08:35+00:00
Date Issued	2002-10-10
Citation	Detrick, R. S., J. M. Sinton, G. Ito, J. P. Canales, M. Behn, T. Blacic, B. Cushman, J. E. Dixon, D. W. Graham, and J. J. Mahoney, Correlated geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the Gala´pagos Spreading Center, Geochem. Geophys. Geosyst., 3(10), 8501, 2002.
Journal Title	Geochemistry, Geophysics, Geosystems
Journal Volume	3
Journal Issue/Number	10
权利声明	Copyright Not Evaluated
Publisher	American Geophysical Union
Language	English [eng]
Replaces	http://hdl.handle.net/1957/15847
ISSN	1525-2027

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Correlated geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the Galápagos Spreading Center

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Correlated geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the Galápagos Spreading Center

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