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dc.contributor.authorParnell-Turner, Ross  Concept link
dc.contributor.authorSchouten, Hans A.  Concept link
dc.contributor.authorSmith, Deborah K.  Concept link
dc.date.accessioned2017-01-04T16:49:48Z
dc.date.available2017-04-22T08:05:16Z
dc.date.issued2016-10-22
dc.identifier.citationGeochemistry, Geophysics, Geosystems 17 (2016): 3993–4010en_US
dc.identifier.urihttps://hdl.handle.net/1912/8641
dc.descriptionAuthor Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry, Geophysics, Geosystems 17 (2016): 3993–4010, doi:10.1002/2016GC006514.en_US
dc.description.abstractThe 16°30'N area of the Mid-Atlantic Ridge represents an area of present-day detachment faulting. Here we present shipboard bathymetric, magnetic and gravity data acquired up to 65 km from the ridge axis that reveal a varied tectonic history of this region. Magnetic data are used to calculate spreading rates and examine spreading rate variability along and across the axis. Bathymetric and gravity data are used to infer the crustal structure. A central magnetic anomaly 40% narrower than expected is observed along much of the study area. Misalignment between modern-day spreading center and magnetic anomalies indicates tectonic reorganization of the axis within the past 780 ka. Observed magnetic anomalies show a pattern of anomalous skewness consistent with rotation of magnetic vectors probably associated with detachment faulting. Relatively thin crust north of a small (∼7 km) nontransform offset coincides with a weakly magmatic spreading axis. In contrast, to the south a robust axial volcanic ridge is underlain by thicker crust. Variations in crustal structure perpendicular to the axis occur over tens of kilometers, indicating processes which occur over timescales of 1–2 Ma.en_US
dc.description.sponsorshipNational Science Foundation Grant Number: OCE-1155650en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2016GC006514
dc.subjectMid-Ocean Ridgeen_US
dc.subjectOceanic detachment faulten_US
dc.subjectCrustal accretionen_US
dc.subjectGravity anomaliesen_US
dc.subjectMagnetic anomaliesen_US
dc.titleTectonic structure of the Mid-Atlantic Ridge near 16°30′Nen_US
dc.typeArticleen_US
dc.description.embargo2017-04-22en_US
dc.identifier.doi10.1002/2016GC006514


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