|
Science 10 September 1999:
Vol. 285. no. 5434, pp. 1711 - 1715
DOI: 10.1126/science.285.5434.1711
|
|
Reports
Lower Mantle Lateral Heterogeneity Beneath the Caribbean Sea
Ileana Madalina Tibuleac,
Eugene Herrin
Seismic wave reflections from Earth's core recorded at seismic
arrays in North America from events in the Caribbean Islands, Venezuela, and the Mid-Atlantic Ridge have observed slownesses more
than 64 percent greater than predicted by the IASPEI91 standard Earth
model. P waves turning in the lowermost mantle beneath the same region also have anomalous slowness. The slowness anomalies are
not accompanied by significant travel time residuals and appear to be
caused by lateral inhomogeneities in the velocity structure of the
lower mantle.
Department of Geological Sciences, Southern Methodist University,
Dallas, TX 75275-0395, USA. E-mail: (for I.M.T.)
ileana{at}passion.isem.smu.edu; (for E.H.) herrin{at}passion.isem.smu.edu
Read the Full Text
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
- Large Teleseismic P Wavefront Deflections Observed with Broadband Arrays.
- (2003)
Bulletin of the Seismological Society of America
93, 747-756
