Deep mantle seismic modeling and imaging

Thorne Lay, Edward Garnero

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Detailed seismic modeling and imaging of Earth's deep interior is providing key information about lower-mantle structures and processes, including heat flow across the core-mantle boundary, the configuration of mantle upwellings and downwellings, phase equilibria and transport properties of deep mantle materials, and mechanisms of core-mantle coupling. Multichannel seismic wave analysis methods that provide the highest-resolution deep mantle structural information include network waveform modeling and stacking, array processing, and 3D migrations of P- and S-wave seismograms. These methods detect and identify weak signals from structures that cannot be resolved by global seismic tomography. Some methods are adapted from oil exploration seismology, but all are constrained by the source and receiver distributions, long travel paths, and strong attenuation experienced by seismic waves that penetrate to the deep mantle. Large- and small-scale structures, with velocity variations ranging from a fraction of a percent to tens of percent, have been detected and are guiding geophysicists to new perspectives of thermochemical mantle convection and evolution.

Original languageEnglish (US)
Pages (from-to)91-123
Number of pages33
JournalAnnual Review of Earth and Planetary Sciences
Volume39
DOIs
StatePublished - May 30 2011

Fingerprint

Earth mantle
mantle
seismic wave
modeling
mantle process
seismic waves
mantle structure
core-mantle boundary
mantle convection
seismic tomography
seismology
downwelling
phase equilibrium
lower mantle
seismogram
stacking
heat flow
P-wave
S-wave
oil exploration

Keywords

  • core-mantle boundary
  • D′
  • lower-mantle structure
  • superplumes
  • thermochemical anomalies
  • ultralow-velocity zones

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Deep mantle seismic modeling and imaging. / Lay, Thorne; Garnero, Edward.

In: Annual Review of Earth and Planetary Sciences, Vol. 39, 30.05.2011, p. 91-123.

Research output: Contribution to journalArticle

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