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Modes of faulting at mid-ocean ridges

Buck, W. Roger and Lavier, Luc L. and Poliakov, Alexei N. B. (2005) Modes of faulting at mid-ocean ridges. Nature, 434 (7034). pp. 719-723. ISSN 0028-0836. doi:10.1038/nature03358. https://resolver.caltech.edu/CaltechAUTHORS:20150319-085050879

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Abstract

Abyssal-hill-bounding faults that pervade the oceanic crust are the most common tectonic feature on the surface of the Earth. The recognition that these faults form at plate spreading centres came with the plate tectonic revolution. Recent observations reveal a large range of fault sizes and orientations; numerical models of plate separation, dyke intrusion and faulting require at least two distinct mechanisms of fault formation at ridges to explain these observations. Plate unbending with distance from the top of an axial high reproduces the observed dip directions and offsets of faults formed at fast-spreading centres. Conversely, plate stretching, with differing amounts of constant-rate magmatic dyke intrusion, can explain the great variety of fault offset seen at slow-spreading ridges. Very-large-offset normal faults only form when about half the plate separation at a ridge is accommodated by dyke intrusion.


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http://dx.doi.org/10.1038/nature03358DOIArticle
http://www.nature.com/nature/journal/v434/n7034/full/nature03358.htmlPublisherArticle
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Additional Information:© 2005 Nature Publishing Group. Received 8 September 2004; accepted 12 January 2005. Work supported by the National Science Foundation. We thank W. Haxby for help with images and J. Karson for comments on the text.
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Issue or Number:7034
DOI:10.1038/nature03358
Record Number:CaltechAUTHORS:20150319-085050879
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150319-085050879
Official Citation:Buck, W. R., Lavier, L. L., & Poliakov, A. N. B. (2005). Modes of faulting at mid-ocean ridges. [10.1038/nature03358]. Nature, 434(7034), 719-723.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55916
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:24 Mar 2015 22:22
Last Modified:10 Nov 2021 20:52

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