Preferential detection of the Lehmann discontinuity beneath continents

  • Gu Y
  • Dziewonski A
  • Ekström G
  • 14

    Readers

    Mendeley users who have this article in their library.
  • 55

    Citations

    Citations of this article.

Abstract

We perform a global survey for the presence of the Lehmann discontinuity using similar to 20,000 long-period SS precursors. This data set is highly sensitive to upper mantle reflectors and the coverage is more complete than in previous studies. Our survey indicates that the Lehmann discontinuity is a local feature that is observed under continents more than twice as often as it is observed under oceans. We observe significant variations in travel times and waveforms associated with this shallow mantle reflector, indicating its complexity and lateral depth variations. Little signal is detected on the continent-scale stacks of the SS precursors, which provides further evidence for the intermittent and variable nature of the Lehmann discontinuity.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Yu T. Gu

  • Adam M. Dziewonski

  • Göran Ekström

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free