Galapagos rift at 86/sup 0/W: Morphological wave forms; evidence for a propagating rift
Journal Article
·
· J. Geophys. Res.; (United States)
A combination of near-bottom and multibeam surveys of the N--S spreading Galapagos Rift reveals periodic morphological transitions from highs to lows along fault scarps with amplitudes of 90--140 m and wavelengths of 24--30 km. ALl fault scarps reflect similar wave forms, yet the highs and lows are offset by a consistent phase shift with each successive increment of time. Fault scarp morphology realigns approximately every 0.33 m.y. This progression along strike, distance, and time infers either postemplacement tectonics resulting from antisymmetric distribution of stresses in young crust, oscillating volcanism, or propagation of a magma chamber(s) along the axis of the spreading center.
- Research Organization:
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution Woods Hole, Massachusetts 02543
- OSTI ID:
- 5701007
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 84:B10; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Mon Sep 10 00:00:00 EDT 1979
· J. Geophys. Res.; (United States)
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OSTI ID:5701171
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Tue Feb 09 23:00:00 EST 1982
· J. Geophys. Res.; (United States)
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OSTI ID:5545756
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Conference
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Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6454315