Variation in styles of rifting in the Gulf of California


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dc.contributor.author Lizarralde, Daniel
dc.contributor.author Axen, Gary J.
dc.contributor.author Brown, Hillary E.
dc.contributor.author Fletcher, John M.
dc.contributor.author Gonzalez-Fernandez, Antonio
dc.contributor.author Harding, Alistair J.
dc.contributor.author Holbrook, W. Steven
dc.contributor.author Kent, Graham M.
dc.contributor.author Paramo, Pedro
dc.contributor.author Sutherland, Fiona
dc.contributor.author Umhoefer, Paul J.
dc.date.accessioned 2007-12-21T20:37:38Z
dc.date.available 2007-12-21T20:37:38Z
dc.date.issued 2007-06-18
dc.identifier.uri http://hdl.handle.net/1912/1940
dc.description Author Posting. © Nature Publishing Group, 2007. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in Nature 448 (2007): 466-469, doi:10.1038/nature06035. en
dc.description.abstract The rifting of continental lithosphere is a fundamental solid-earth process that leads to the formation of rifted continental margins and ocean basins. Understanding of this process comes from observations of the geometry of rifted margins and the magmatism resulting from rifting, which inform us about the strength of the lithosphere, the state of the underlying mantle, and the transition from rifting to seafloor spreading. Here we describe results from the PESCADOR seismic experiment in the southern Gulf of California and present the first crustal-scale images across conjugate margins of multiple segments within a single rift that has reached the stage of oceanic spreading. A surprisingly large variation in rifting style and magmatism is observed between these segments, from wide rifting with minor syn-rift magmatism to narrow rifting in magmatically robust segments. These differences encompass much of the variation observed across nearly all other non-end-member continental margins. The characteristics of magmatic endmember margins are typically explained in terms of mantle temperature. Our explanations for the variation in the Gulf of California, in contrast, invoke mantle depletion to account for wide, magma-poor rifting and mantle fertility and possibly the influence of sediments to account for robust rift and post-rift magmatism in the Gulf of California. These factors may vary laterally over small distances in regions that have transitioned from convergence to extension, as is the case for the Gulf of California and many other rifts. en
dc.description.sponsorship This work was funded by a grant from the U.S. NSF-MARGINS program. en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.uri http://dx.doi.org/10.1038/nature06035
dc.title Variation in styles of rifting in the Gulf of California en
dc.type Preprint en

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