Evidence for deep mantle circulation from global tomography
Seismic tomography based on P-wave travel times and improved earthquake locations provides further evidence for mantle-wide convective flow. The use of body waves makes it possible to resolve long, narrow structures in the lower mantle some of which can be followed to sites of present-day plate oonvergence at the Earth's surface. The transition from subduction-related linear structures in the mid-mantle to long-wavelength hetorogeneity near the core-mantle boundary remains enigmatic, but at least some slab segments seem to sink to the bottom of the mantle.
Citation Information
Publication Year | 1997 |
---|---|
Title | Evidence for deep mantle circulation from global tomography |
DOI | 10.1038/386578a0 |
Authors | R. D. Van Der Hilst, S. Widiyantoro, E.R. Engdahl |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Nature |
Index ID | 70019882 |
Record Source | USGS Publications Warehouse |