Inversion of gravity anomalies over spreading oceanic ridges


Jacoby W., Cavsak H.

JOURNAL OF GEODYNAMICS, vol.39, no.5, pp.461-474, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 5
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jog.2005.04.011
  • Title of Journal : JOURNAL OF GEODYNAMICS
  • Page Numbers: pp.461-474

Abstract

Models of spreading ocean ridges are derived by Bayesian gravity inversion with geophysical and geodynamic a priori information. The aim is to investigate the influence of spreading rate, plate dynamics and tectonic framework on crust and upper mantle structure by comparing the Mid Atlantic Ridge (MAR), the Indian Ocean Ridge (IND) and the East Pacific Rise (PAC). They differ in mean spreading rate, dynamic settings, as attached slabs, and plume interaction. Topography or bathymetry, gravity, isostasy, seismology and geology, etc. are averaged along the ridges and guide the construction of initial 2D models, including features as mean plumes, i.e. averaged along the ridge. This is a gross simplification, and the results are considered preliminary.