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| Detailed Reference Information |
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O'Connor, J.M., Stoffers, P. and Wijbrans, J.R. (2001). En echelon volcanic elongate ridges connecting intraplate Foundation Chain volcanism to the Pacific-Antarctic spreading center (vol 189, pg 93, 2001). Earth and Planetary Science Letters 192(4): 631-+. doi: 10.1016/S0012-821X(01)00461-7. |
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The development of volcanic elongate ridges (VERs) could be controlled in many cases by complex processes related to interaction between mantle plumes and spreading centers. We report here measured ages for the Foundation Chain, SE Pacific, showing that volcanism along morphologically distinct VERs can develop occasionally as rapidly formed continuous lines of coeval volcanism extending from a region of intraplate volcanism to the Pacific-Antarctic spreading center. But a significantly more dominant trend is for coeval, yet structurally disconnected, segments of Foundation Chain VERs to develop in a series of en echelon, NE-SW elongate 'zones' of coeval hotspot volcanism, These elongate zones developed at intervals of approximately 1 Myr while maintaining a basically steady state orientation and size as the Pacific-Antarctic spreading center migrated continually closer to the Foundation plume hotspot. We infer from this new information that Foundation Chain VER development was controlled by an interplay between short-lived, local factors (e.g., location of nearest spreading center segment, lithospheric stress) and long-lived attributes of the Foundation plume hotspot (e.g., size, orientation, periodicity). (C) 2001 Elsevier Science B.V. All rights reserved. |
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| BACKGROUND DATA FILES |
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Abstract |
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Table 1 |
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Table 2A |
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Table 2B |
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Table 2C |
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Table 3 |
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Table 4 |
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Sample Preparation & Analytical Procedure |
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Keywords
spreading centers, hot spots, mantle plumes, pacific-antarctic ridge, ar-40/ar-39, seamount chain, hotspot interaction, mantle, plumes |
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Publisher
Elsevier Science
P.O. Box 211
1000 AE Amsterdam
The Netherlands
(+31) 20 485 3757
(+31) 20 485 3432
nlinfo-f@elsevier.com |
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