Variation in styles of rifting in the Gulf of California

Daniel Lizarralde (), Gary J. Axen, Hillary E. Brown, John M. Fletcher, Antonio González-Fernández, Alistair J. Harding, W. Steven Holbrook, Graham M. Kent, Pedro Paramo, Fiona Sutherland and Paul J. Umhoefer
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Daniel Lizarralde: Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
Gary J. Axen: New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA
Hillary E. Brown: University of Wyoming, Laramie, Wyoming 82071, USA
John M. Fletcher: Centro de Invest. Científica y de Educación Superior de Ensenada, Ensenada C.P. 22860, Mexico
Antonio González-Fernández: Centro de Invest. Científica y de Educación Superior de Ensenada, Ensenada C.P. 22860, Mexico
Alistair J. Harding: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92037, USA
W. Steven Holbrook: University of Wyoming, Laramie, Wyoming 82071, USA
Graham M. Kent: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92037, USA
Pedro Paramo: University of Wyoming, Laramie, Wyoming 82071, USA
Fiona Sutherland: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92037, USA
Paul J. Umhoefer: Northern Arizona University, Flagstaff, Arizona 86011, USA

Nature, 2007, vol. 448, issue 7152, 466-469

Abstract: Fertile ground for rifting Results from the PESCADOR seismic experiment in the Gulf of California provide new insight into rifting — the process that ruptures continents and forms new ocean basins. Unpredicted variations in magmatic activity in continental rifts are commonly attributed to variations in mantle temperature, but such thermal variations tend to occur over large length scales. The new results reveal large differences in rifting style and magmatism over short lateral distances. This suggests that the observed range in magmatism is caused not by variation in temperature, but rather by variability in mantle composition and fertility — the intrinsic capacity of the underlying mantle to produce melt.

Date: 2007
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DOI: 10.1038/nature06035

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