Evidence for postglacial signatures in gravity gradients: A clue in lower mantle viscosity
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- 作者：Laurent Mé ; tiviera ; laurent.metivier@ign.fr" class="auth_mail" title="E-mail the corresponding author ; Lambert Caronb ; Marianne Greff-Lefftzb ; Gwendoline Pajot-Mé ; tiviera ; Luce Fleitoutc ; Hé ; lè ; ne Roubya
- 关键词：gravity gradients ; GIA ; mantle viscosity ; deformation modelling ; Laurentia
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 October 2016
- 年：2016
- 卷：452
- 期：Complete
- 页码：146-156
- 全文大小：2809 K
文摘
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Gravity gradients show long-wavelength anomalies across North America.
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Laurentian geoid, gravity and gravity gradient anomalies are mostly caused by GIA.
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These results imply a high viscosity in the lower mantle.
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Thermo-chemical studies of the North American lithosphere should be corrected for GIA.
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Such a change in GIA modelling may affect recent ice melting estimations.