We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Finite-frequency tomography reveals a variety of plumes in the mantle.
- Authors
Montelli, Raffaella; Nolet, Guust; Dahlen, F A; Masters, Guy; Engdahl, E Robert; Hung, Shu-Huei
- Abstract
We present tomographic evidence for the existence of deep-mantle thermal convection plumes. P-wave velocity images show at least six well-resolved plumes that extend into the lowermost mantle: Ascension, Azores, Canary, Easter, Samoa, and Tahiti. Other less well-resolved plumes, including Hawaii, may also reach the lowermost mantle. We also see several plumes that are mostly confined to the upper mantle, suggesting that convection may be partially separated into two depth regimes. All of the observed plumes have diameters of several hundred kilometers, indicating that plumes convey a substantial fraction of the internal heat escaping from Earth.
- Publication
Science (New York, N.Y.), 2004, Vol 303, Issue 5656, p338
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1092485