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Detailed Reference Information |
Maia, M., Goslin, J. and Gente, P. (2007). Evolution of the accretion processes along the Mid-Atlantic Ridge north of the Azores since 5.5 Ma: An insight into the interactions between the ridge and the plume. Geochemistry Geophysics Geosystems 8: doi: 10.1029/2006GC001318. issn: 1525-2027. |
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High-resolution bathymetry and gravity data north of the Azores Plateau show that this part of the North Mid-Atlantic Ridge is presently undergoing a phase of weak crustal production and magmatism. Most of the ridge segments are small and short-lived, suggesting a disrupted and highly variable accretion regime since anomaly 3A. The influence of the nearby plume appears to be relatively minor and corresponds more to a weak thermal signal than to any major input of plume material and increased crustal production at the axis. A period of increased magmatism was identified at the southern limit of the study area (near 400N) around anomaly 5. This magmatic "pulse" caused the emplacement of a topographic high, probably underlain by a thickened crust. This pulse probably marks the northernmost and last significant arrival of material from the Azores plume to the MAR axis. |
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Abstract |
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Keywords
Marine Geology and Geophysics, Midocean ridge processes, Marine Geology and Geophysics, Seafloor morphology, geology, and geophysics |
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Journal
Geochemistry Geophysics Geosystems |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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